want to achieve 1-2 Mbps through BLE.

RE: want to achieve 1-2 Mbps through BLE.

Karl Ylvisaker — Mon, 15 Nov 2021 09:39:12 GMT

We do not provide support in the forums during the weekend. Your other ticket will be assigned to an available engineer sometime later today.

Best regards,
Karl

RE: want to achieve 1-2 Mbps through BLE.

Mohsin khan — Mon, 15 Nov 2021 09:32:19 GMT

https://devzone.nordicsemi.com/f/nordic-q-a/81676/ota-update-in-mesh

i have questioned one more thing please do me a favor
I am not getting any replies

Case ID: 279624

RE: want to achieve 1-2 Mbps through BLE.

Karl Ylvisaker — Mon, 15 Nov 2021 09:17:00 GMT

Thank you for the update - I am glad to hear that you have achieved a transfer rate you are satisfied with. It is still not quite the maximal rate, but if this suffices for your application then we may stop the debugging of this issue here.
If you should want to look into this again in the future we will require a sniffer trace to effectively debug any bottlenecks.

[quote user="Mohsin khan"]Thanks karl for help . [/quote]

It is no problem at all, moshin-khan!

Please do not hesitate to open another ticket if you should encounter any issues or questions in the future.

Good luck with your development!

Best regards,
Karl

RE: want to achieve 1-2 Mbps through BLE.

Mohsin khan — Mon, 15 Nov 2021 07:09:01 GMT

I have encountered the issue
i did 4 things to increase my throughput

I changed min and max interval to 50ms

I have removed scan from my code now it just advertises

void conn_evt_len_ext_set(void)
{
    ret_code_t err_code;
    ble_opt_t  opt;

    memset(&opt, 0x00, sizeof(opt));
    opt.common_opt.conn_evt_ext.enable = 1;

    err_code = sd_ble_opt_set(BLE_COMMON_OPT_CONN_EVT_EXT, &opt);
    APP_ERROR_CHECK(err_code);
}

added this function after ble_scan_init()

and increasing NRF_SDH_BLE_GAP_EVENT_LENGTH in my sdk

It was giving me throughput of 90kBps and i am satisfied with it . Thanks karl for help .

RE: want to achieve 1-2 Mbps through BLE.

Karl Ylvisaker — Tue, 02 Nov 2021 09:39:53 GMT

Hello again,

As mentioned before, the easiest thing you can do to increase your throughput is to reduce the number of useless characters you are transferring, such as g_x\ and g_y\ etc. These formatting characters serve no real purpose, since you know the length of each value field, and thus you know their index in the received raw byte value array that you receive if you remove the formatting.
Removing all these formatting characters and sending just the valuable data characters will drastically increase your throughput. This is my first and foremost advice for increasing your throughput.

If you want this particular formatting on the central side you can add that after having received just the data bytes from the peripheral.

Best regards,
Karl

RE: want to achieve 1-2 Mbps through BLE.

Mohsin khan — Thu, 28 Oct 2021 12:03:20 GMT

Hello again karl ,

Issue remains the same I am not getting my desirable throughput , Throughput is still 90KBPS , I want to achieve 150KBPS but having no luck I am uploading my all code important parameter to have a look and give me some good suggestion .

This is main code which i want to use .

ret_code_t err_code;
  static FATFS fs;
  static DIR dir;
  static FILINFO fno;
  ble_gatts_hvx_params_t hvx_params;
  DSTATUS disk_state = STA_NOINIT;
  

  // Initialize FATFS disk I/O interface by providing the block device.
  static diskio_blkdev_t drives[] =
      {
          DISKIO_BLOCKDEV_CONFIG(NRF_BLOCKDEV_BASE_ADDR(m_block_dev_sdc, block_dev), NULL)};

  diskio_blockdev_register(drives, ARRAY_SIZE(drives));

  NRF_LOG_INFO("Initializing disk 0 (SDC)...");
  for (uint32_t retries = 3; retries && disk_state; --retries) {
    disk_state = disk_initialize(0);
  }
  if (disk_state) {
    NRF_LOG_INFO("Disk initialization failed.");
    return;
  }

  uint32_t blocks_per_mb = (1024uL * 1024uL) / m_block_dev_sdc.block_dev.p_ops->geometry(&m_block_dev_sdc.block_dev)->blk_size;
  uint32_t capacity = m_block_dev_sdc.block_dev.p_ops->geometry(&m_block_dev_sdc.block_dev)->blk_count / blocks_per_mb;
  NRF_LOG_INFO("Capacity: %d MB", capacity);

  NRF_LOG_INFO("Mounting volume...");
  ff_result = f_mount(&fs, "", 1);
  if (ff_result) {
    NRF_LOG_INFO("Mount failed.");
    return;
  }

  NRF_LOG_INFO("\r\n Listing directory: /");
  ff_result = f_opendir(&dir, "/");
  if (ff_result) {
    NRF_LOG_INFO("Directory listing failed!");
    return;
  }

  do {
    ff_result = f_readdir(&dir, &fno);
    if (ff_result != FR_OK) {
      NRF_LOG_INFO("Directory read failed.");
      return;
    }

    if (fno.fname[0]) {
      if (fno.fattrib & AM_DIR) {
        NRF_LOG_RAW_INFO("   <DIR>   %s", (uint32_t)fno.fname);
      } else {
        NRF_LOG_RAW_INFO("%9lu  %s", fno.fsize, (uint32_t)fno.fname);
      }
    }
  } while (fno.fname[0]);
  NRF_LOG_RAW_INFO("");
  uint8_t string[15];
  NRF_LOG_INFO(string);
  NRF_LOG_INFO("Writing to file " FILE_NAME "...");
  ff_result = f_open(&file, FILE_NAME, FA_READ);
  if (ff_result != FR_OK) {
    NRF_LOG_INFO("Unable to open or create file: " FILE_NAME ".");
    return;
  }
  uint64_t size;
  size = f_size(&file);
   char * data = NULL;
        data = malloc(size); /* allocate memory to store image data */
        NRF_LOG_INFO("data size: %d bytes", data);
        NRF_LOG_INFO("File size: %d bytes", size);
        int b=86;
        int counter=0;
        char string1[150];
    for(int a=1 ;a<2000000;a=a+150)
    {
    counter++;
    
        f_lseek(&file,b);
    ff_result = f_read(&file, string1, 150, (UINT *) &bytes_written);
    if (ff_result != FR_OK)
    {
        NRF_LOG_INFO("read failed\r\n.");
    }
    else
    {
        //NRF_LOG_INFO("%d bytes read.", bytes_written);
    }
    NRF_LOG_HEXDUMP_DEBUG(string1, 0);
                    do
                    {

                    
                        uint16_t length = (uint16_t)150;
                        err_code = ble_nus_data_send(&m_nus, string1, &length, m_conn_handle);
                       
                        
                        
                        if ((err_code != NRF_ERROR_INVALID_STATE) &&
                            (err_code != NRF_ERROR_RESOURCES) &&
                            (err_code != NRF_ERROR_NOT_FOUND))
                        {
                          APP_ERROR_CHECK(err_code);
                        }
                    } while (err_code == NRF_ERROR_RESOURCES);
                    b=b+150;
    
    }
    (void) f_close(&file);
    NRF_LOG_INFO("%d",counter);
    NRF_LOG_INFO("done");

These are list of some parameters which needed for BLE .

#define MIN_CONN_INTERVAL                    (uint16_t)(MSEC_TO_UNITS(50, UNIT_1_25_MS)) 
#define MAX_CONN_INTERVAL                    (uint16_t)(MSEC_TO_UNITS(50, UNIT_1_25_MS))    /**< Maximum acceptable connection interval (75 ms), Connection interval uses 1.25 ms units. */
#define SLAVE_LATENCY 0                                      /**< Slave latency. */
#define CONN_SUP_TIMEOUT MSEC_TO_UNITS(4000, UNIT_10_MS)     /**< Connection supervisory timeout (4 seconds), Supervision Timeout uses 10 ms units. */
#define FIRST_CONN_PARAMS_UPDATE_DELAY APP_TIMER_TICKS(5000) /**< Time from initiating event (connect or start of notification) to first time sd_ble_gap_conn_param_update is called (5 seconds). */
#define NEXT_CONN_PARAMS_UPDATE_DELAY APP_TIMER_TICKS(30000) /**< Time between each call to sd_ble_gap_conn_param_update after the first call (30 seconds). */
#define MAX_CONN_PARAMS_UPDATE_COUNT 3

This is some code of BLE_gatts.h which we needed in BLE .

#ifndef NRF_SDH_BLE_GAP_DATA_LENGTH
#define NRF_SDH_BLE_GAP_DATA_LENGTH 251
#endif

// <o> NRF_SDH_BLE_PERIPHERAL_LINK_COUNT - Maximum number of peripheral links. 
#ifndef NRF_SDH_BLE_PERIPHERAL_LINK_COUNT
#define NRF_SDH_BLE_PERIPHERAL_LINK_COUNT 1
#endif

// <o> NRF_SDH_BLE_CENTRAL_LINK_COUNT - Maximum number of central links. 
#ifndef NRF_SDH_BLE_CENTRAL_LINK_COUNT
#define NRF_SDH_BLE_CENTRAL_LINK_COUNT 1 //2
#endif

// <o> NRF_SDH_BLE_TOTAL_LINK_COUNT - Total link count. 
// <i> Maximum number of total concurrent connections using the default configuration.

#ifndef NRF_SDH_BLE_TOTAL_LINK_COUNT
#define NRF_SDH_BLE_TOTAL_LINK_COUNT 1 //3
#endif

// <o> NRF_SDH_BLE_GAP_EVENT_LENGTH - GAP event length. 
// <i> The time set aside for this connection on every connection interval in 1.25 ms units.

#ifndef NRF_SDH_BLE_GAP_EVENT_LENGTH
#define NRF_SDH_BLE_GAP_EVENT_LENGTH 400
#endif

// <o> NRF_SDH_BLE_GATT_MAX_MTU_SIZE - Static maximum MTU size. 
#ifndef NRF_SDH_BLE_GATT_MAX_MTU_SIZE
#define NRF_SDH_BLE_GATT_MAX_MTU_SIZE 247
#endif

// <o> NRF_SDH_BLE_GATTS_ATTR_TAB_SIZE - Attribute Table size in bytes. The size must be a multiple of 4. 
#ifndef NRF_SDH_BLE_GATTS_ATTR_TAB_SIZE
#define NRF_SDH_BLE_GATTS_ATTR_TAB_SIZE 1408
#endif

This is code event on BLE peripheral .

So check these parameters , I know only these are important but i think i can give you code of anything is missing .

/**
 * Copyright (c) 2014 - 2020, Nordic Semiconductor ASA
 *
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without modification,
 * are permitted provided that the following conditions are met:
 *
 * 1. Redistributions of source code must retain the above copyright notice, this
 *    list of conditions and the following disclaimer.
 *
 * 2. Redistributions in binary form, except as embedded into a Nordic
 *    Semiconductor ASA integrated circuit in a product or a software update for
 *    such product, must reproduce the above copyright notice, this list of
 *    conditions and the following disclaimer in the documentation and/or other
 *    materials provided with the distribution.
 *
 * 3. Neither the name of Nordic Semiconductor ASA nor the names of its
 *    contributors may be used to endorse or promote products derived from this
 *    software without specific prior written permission.
 *
 * 4. This software, with or without modification, must only be used with a
 *    Nordic Semiconductor ASA integrated circuit.
 *
 * 5. Any software provided in binary form under this license must not be reverse
 *    engineered, decompiled, modified and/or disassembled.
 *
 * THIS SOFTWARE IS PROVIDED BY NORDIC SEMICONDUCTOR ASA "AS IS" AND ANY EXPRESS
 * OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
 * OF MERCHANTABILITY, NONINFRINGEMENT, AND FITNESS FOR A PARTICULAR PURPOSE ARE
 * DISCLAIMED. IN NO EVENT SHALL NORDIC SEMICONDUCTOR ASA OR CONTRIBUTORS BE
 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE
 * GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
 * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 *
 */
/**
 * @brief BLE Heart Rate Collector application main file.
 *
 * This file contains the source code for a sample heart rate collector.
 */

#include <stdbool.h>
#include <stdint.h>
#include <stdio.h>
#include <string.h>

#include "bsp.h"
#include "diskio_blkdev.h"
#include "ff.h"
#include "nrf.h"
#include "nrf_block_dev_sdc.h"
#include "nrf_delay.h"
#include "nrf_drv_gpiote.h"
#include "nrf_drv_timer.h"

#include "app_uart.h"
#include "ble_advdata.h"
#include "ble_advertising.h"
#include "ble_conn_params.h"
#include "ble_nus.h"
#include "nrf_ble_qwr.h"
#include "ble_gatts.h"

#include "app_error.h"
#include "app_timer.h"
#include "app_util.h"
#include "ble.h"
#include "ble_bas_c.h"
#include "ble_conn_state.h"
#include "ble_db_discovery.h"
#include "ble_hci.h"
#include "ble_hrs_c.h"
#include "ble_srv_common.h"
#include "bsp_btn_ble.h"
#include "fds.h"
#include "nordic_common.h"
#include "nrf_ble_gatt.h"
#include "nrf_ble_lesc.h"
#include "nrf_ble_scan.h"
#include "nrf_fstorage.h"
#include "nrf_log.h"
#include "nrf_log_ctrl.h"
#include "nrf_log_default_backends.h"
#include "nrf_pwr_mgmt.h"
#include "nrf_sdh.h"
#include "nrf_sdh_ble.h"
#include "nrf_sdh_soc.h"
#include "nrf_sdm.h"
#include "peer_manager.h"
#include "peer_manager_handler.h"

#if defined(UART_PRESENT)
#include "nrf_uart.h"
#endif
#if defined(UARTE_PRESENT)
#include "nrf_uarte.h"
#endif

#define FILE_NAME "hr.CSV"
#define TEST_STRING "SD card example."

#define NUS_SERVICE_UUID_TYPE BLE_UUID_TYPE_VENDOR_BEGIN

#ifdef BSP_BUTTON_0
#define PIN_IN BSP_BUTTON_0
#endif
#ifndef PIN_IN
#error "Please indicate input pin"
#endif

#ifdef BSP_LED_1
#define PIN_OUT BSP_LED_1
#endif
#ifndef PIN_OUT
#error "Please indicate output pin"
#endif /**< Context for the Queued Write module.*/

BLE_ADVERTISING_DEF(m_advertising);
BLE_NUS_DEF(m_nus, 6);
NRF_BLE_QWRS_DEF(m_qwr, 6);
static ble_uuid_t m_adv_uuids[] = /**< Universally unique service identifier. */
    {
        {BLE_UUID_NUS_SERVICE, NUS_SERVICE_UUID_TYPE}};

#define APP_ADV_INTERVAL 64 /**< The advertising interval (in units of 0.625 ms. This value corresponds to 40 ms). */

#define APP_ADV_DURATION 18000

volatile uint8_t button_pressed = 0;

volatile int timer_call = 0;
FRESULT ff_result;
static FIL file;

uint16_t heart_rate;
char s_heartrate[4];
volatile uint8_t c;
uint32_t bytes_written;
const nrf_drv_timer_t TIMER_LED = NRF_DRV_TIMER_INSTANCE(1);
#define SDC_SCK_PIN ARDUINO_13_PIN  ///< SDC serial clock (SCK) pin.
#define SDC_MOSI_PIN ARDUINO_11_PIN ///< SDC serial data in (DI) pin.
#define SDC_MISO_PIN ARDUINO_12_PIN ///< SDC serial data out (DO) pin.
#define SDC_CS_PIN ARDUINO_10_PIN   ///< SDC chip select (CS) pin.

#define MIN_CONN_INTERVAL                    (uint16_t)(MSEC_TO_UNITS(50, UNIT_1_25_MS)) 
#define MAX_CONN_INTERVAL                    (uint16_t)(MSEC_TO_UNITS(50, UNIT_1_25_MS))    /**< Maximum acceptable connection interval (75 ms), Connection interval uses 1.25 ms units. */
#define SLAVE_LATENCY 0                                      /**< Slave latency. */
#define CONN_SUP_TIMEOUT MSEC_TO_UNITS(4000, UNIT_10_MS)     /**< Connection supervisory timeout (4 seconds), Supervision Timeout uses 10 ms units. */
#define FIRST_CONN_PARAMS_UPDATE_DELAY APP_TIMER_TICKS(5000) /**< Time from initiating event (connect or start of notification) to first time sd_ble_gap_conn_param_update is called (5 seconds). */
#define NEXT_CONN_PARAMS_UPDATE_DELAY APP_TIMER_TICKS(30000) /**< Time between each call to sd_ble_gap_conn_param_update after the first call (30 seconds). */
#define MAX_CONN_PARAMS_UPDATE_COUNT 3

#define DEVICE_NAME "SPORTS TRACKER"
static uint16_t m_ble_nus_max_data_len = BLE_GATT_ATT_MTU_DEFAULT - 3;
#define APP_BLE_CONN_CFG_TAG 1 /**< A tag identifying the SoftDevice BLE configuration. */

#define APP_BLE_OBSERVER_PRIO 3 /**< Application's BLE observer priority. You shouldn't need to modify this value. */
#define APP_SOC_OBSERVER_PRIO 1 /**< Applications' SoC observer priority. You shouldn't need to modify this value. */

#define LESC_DEBUG_MODE 0 /**< Set to 1 to use LESC debug keys, allows you to use a sniffer to inspect traffic. */

#define SEC_PARAM_BOND 1                               /**< Perform bonding. */
#define SEC_PARAM_MITM 0                               /**< Man In The Middle protection not required. */
#define SEC_PARAM_LESC 1                               /**< LE Secure Connections enabled. */
#define SEC_PARAM_KEYPRESS 0                           /**< Keypress notifications not enabled. */
#define SEC_PARAM_IO_CAPABILITIES BLE_GAP_IO_CAPS_NONE /**< No I/O capabilities. */
#define SEC_PARAM_OOB 0                                /**< Out Of Band data not available. */
#define SEC_PARAM_MIN_KEY_SIZE 7                       /**< Minimum encryption key size in octets. */
#define SEC_PARAM_MAX_KEY_SIZE 16                      /**< Maximum encryption key size in octets. */

#define SCAN_DURATION_WITELIST 3000 /**< Duration of the scanning in units of 10 milliseconds. */
#define HART_RATE_SERVICE_UUID_IDX 0
#define TARGET_UUID BLE_UUID_HEART_RATE_SERVICE                /**< Target device uuid that application is looking for. */
static uint16_t m_conn_handle_hrs_c = BLE_CONN_HANDLE_INVALID; /**< Connection handle for the HRS central application */
static uint16_t m_conn_handle_rscs_c = BLE_CONN_HANDLE_INVALID;
char init[] = "Long,Lat,Alt,Accelx,Accely,Accelz,GYROx,GYROy,GYROz,Magx,Magy,Magz,Heartrate,Bat %  ";
char data[] = "2221";

/**@brief Macro to unpack 16bit unsigned UUID from octet stream. */
#define UUID16_EXTRACT(DST, SRC) \
  do {                           \
    (*(DST)) = (SRC)[1];         \
    (*(DST)) <<= 8;              \
    (*(DST)) |= (SRC)[0];        \
  } while (0)

NRF_BLE_GQ_DEF(m_ble_gatt_queue, /**< BLE GATT Queue instance. */
    NRF_SDH_BLE_CENTRAL_LINK_COUNT,
    NRF_BLE_GQ_QUEUE_SIZE);

BLE_HRS_C_DEF(m_hrs_c);                   /**< Structure used to identify the heart rate client module. */
BLE_BAS_C_DEF(m_bas_c);                   /**< Structure used to identify the Battery Service client module. */
NRF_BLE_GATT_DEF(m_gatt);                 /**< GATT module instance. */
BLE_DB_DISCOVERY_ARRAY_DEF(m_db_disc, 2); /**< Database discovery module instances. */
NRF_BLE_SCAN_DEF(m_scan);                 /**< DB discovery module instance. */
                                          /**< Scanning module instance. */

static uint16_t m_conn_handle;           /**< Current connection handle. */
static bool m_whitelist_disabled;        /**< True if whitelist has been temporarily disabled. */
static bool m_memory_access_in_progress; /**< Flag to keep track of ongoing operations on persistent memory. */

void in_pin_handler(nrf_drv_gpiote_pin_t pin, nrf_gpiote_polarity_t action) {
  c = 1;
}

NRF_BLOCK_DEV_SDC_DEFINE(
    m_block_dev_sdc,
    NRF_BLOCK_DEV_SDC_CONFIG(
        SDC_SECTOR_SIZE,
        APP_SDCARD_CONFIG(SDC_MOSI_PIN, SDC_MISO_PIN, SDC_SCK_PIN, SDC_CS_PIN)),
    NFR_BLOCK_DEV_INFO_CONFIG("Nordic", "SDC", "1.00"));

void timer_led_event_handler(nrf_timer_event_t event_type, void *p_context) {
  switch (event_type) {
  case NRF_TIMER_EVENT_COMPARE0:
  timer_call = 1;
    break;

  default:
    //Do nothing.
    break;
  }
}

static void fatfs_example() {
ret_code_t err_code;
  static FATFS fs;
  static DIR dir;
  static FILINFO fno;
  ble_gatts_hvx_params_t hvx_params;
  DSTATUS disk_state = STA_NOINIT;
  

  // Initialize FATFS disk I/O interface by providing the block device.
  static diskio_blkdev_t drives[] =
      {
          DISKIO_BLOCKDEV_CONFIG(NRF_BLOCKDEV_BASE_ADDR(m_block_dev_sdc, block_dev), NULL)};

  diskio_blockdev_register(drives, ARRAY_SIZE(drives));

  NRF_LOG_INFO("Initializing disk 0 (SDC)...");
  for (uint32_t retries = 3; retries && disk_state; --retries) {
    disk_state = disk_initialize(0);
  }
  if (disk_state) {
    NRF_LOG_INFO("Disk initialization failed.");
    return;
  }

  uint32_t blocks_per_mb = (1024uL * 1024uL) / m_block_dev_sdc.block_dev.p_ops->geometry(&m_block_dev_sdc.block_dev)->blk_size;
  uint32_t capacity = m_block_dev_sdc.block_dev.p_ops->geometry(&m_block_dev_sdc.block_dev)->blk_count / blocks_per_mb;
  NRF_LOG_INFO("Capacity: %d MB", capacity);

  NRF_LOG_INFO("Mounting volume...");
  ff_result = f_mount(&fs, "", 1);
  if (ff_result) {
    NRF_LOG_INFO("Mount failed.");
    return;
  }

  NRF_LOG_INFO("\r\n Listing directory: /");
  ff_result = f_opendir(&dir, "/");
  if (ff_result) {
    NRF_LOG_INFO("Directory listing failed!");
    return;
  }

  do {
    ff_result = f_readdir(&dir, &fno);
    if (ff_result != FR_OK) {
      NRF_LOG_INFO("Directory read failed.");
      return;
    }

    if (fno.fname[0]) {
      if (fno.fattrib & AM_DIR) {
        NRF_LOG_RAW_INFO("   <DIR>   %s", (uint32_t)fno.fname);
      } else {
        NRF_LOG_RAW_INFO("%9lu  %s", fno.fsize, (uint32_t)fno.fname);
      }
    }
  } while (fno.fname[0]);
  NRF_LOG_RAW_INFO("");
  uint8_t string[15];
  NRF_LOG_INFO(string);
  NRF_LOG_INFO("Writing to file " FILE_NAME "...");
  ff_result = f_open(&file, FILE_NAME, FA_READ);
  if (ff_result != FR_OK) {
    NRF_LOG_INFO("Unable to open or create file: " FILE_NAME ".");
    return;
  }
  uint64_t size;
  size = f_size(&file);
   char * data = NULL;
        data = malloc(size); /* allocate memory to store image data */
        NRF_LOG_INFO("data size: %d bytes", data);
        NRF_LOG_INFO("File size: %d bytes", size);
        int b=86;
        int counter=0;
        char string1[150];
    for(int a=1 ;a<2000000;a=a+150)
    {
    counter++;
    
        f_lseek(&file,b);
    ff_result = f_read(&file, string1, 150, (UINT *) &bytes_written);
    if (ff_result != FR_OK)
    {
        NRF_LOG_INFO("read failed\r\n.");
    }
    else
    {
        //NRF_LOG_INFO("%d bytes read.", bytes_written);
    }
    NRF_LOG_HEXDUMP_DEBUG(string1, 0);
                    do
                    {

                    
                        uint16_t length = (uint16_t)150;
                        err_code = ble_nus_data_send(&m_nus, string1, &length, m_conn_handle);
                       
                        
                        
                        if ((err_code != NRF_ERROR_INVALID_STATE) &&
                            (err_code != NRF_ERROR_RESOURCES) &&
                            (err_code != NRF_ERROR_NOT_FOUND))
                        {
                          APP_ERROR_CHECK(err_code);
                        }
                    } while (err_code == NRF_ERROR_RESOURCES);
                    b=b+150;
    
    }
    (void) f_close(&file);
    NRF_LOG_INFO("%d",counter);
    NRF_LOG_INFO("done");

  
}
/**< Scan parameters requested for scanning and connection. */
static ble_gap_scan_params_t const m_scan_param =
    {
        .active = 0x01,
#if (NRF_SD_BLE_API_VERSION > 7)
        .interval_us = NRF_BLE_SCAN_SCAN_INTERVAL * UNIT_0_625_MS,
        .window_us = NRF_BLE_SCAN_SCAN_WINDOW * UNIT_0_625_MS,
#else
        .interval = NRF_BLE_SCAN_SCAN_INTERVAL,
        .window = NRF_BLE_SCAN_SCAN_WINDOW,
#endif
        .filter_policy = BLE_GAP_SCAN_FP_ACCEPT_ALL,
        .timeout = SCAN_DURATION_WITELIST,
        .scan_phys =  BLE_GAP_PHY_1MBPS ,
        .extended = true,

};

/**@brief Names which the central applications will scan for, and which will be advertised by the peripherals.
 *  if these are set to empty strings, the UUIDs defined below will be used
 */
static char const m_target_periph_name[] = ""; /**< If you want to connect to a peripheral using a given advertising name, type its name here. */
static bool is_connect_per_addr = true;        /**< If you want to connect to a peripheral with a given address, set this to true and put the correct address in the variable below. */

static ble_gap_addr_t const m_target_periph_addr =
    {
        /* Possible values for addr_type:
       BLE_GAP_ADDR_TYPE_PUBLIC,
       BLE_GAP_ADDR_TYPE_RANDOM_STATIC,
       BLE_GAP_ADDR_TYPE_RANDOM_PRIVATE_RESOLVABLE,
       BLE_GAP_ADDR_TYPE_RANDOM_PRIVATE_NON_RESOLVABLE. */
        .addr_type = BLE_GAP_ADDR_TYPE_RANDOM_STATIC,
        .addr = {0x8D, 0xFE, 0x23, 0x86, 0x77, 0xD9}};

static void scan_start(void);

/**@brief Function for asserts in the SoftDevice.
 *
 * @details This function will be called in case of an assert in the SoftDevice.
 *
 * @warning This handler is an example only and does not fit a final product. You need to analyze
 *          how your product is supposed to react in case of Assert.
 * @warning On assert from the SoftDevice, the system can only recover on reset.
 *
 * @param[in] line_num     Line number of the failing ASSERT call.
 * @param[in] p_file_name  File name of the failing ASSERT call.
 */
void assert_nrf_callback(uint16_t line_num, const uint8_t *p_file_name) {
  app_error_handler(0xDEADBEEF, line_num, p_file_name);
}

/**@brief Function for handling the Heart Rate Service Client and Battery Service Client errors.
 *
 * @param[in]   nrf_error   Error code containing information about what went wrong.
 */
static void service_error_handler(uint32_t nrf_error) {
  APP_ERROR_HANDLER(nrf_error);
}

/**@brief Function for handling database discovery events.
 *
 * @details This function is callback function to handle events from the database discovery module.
 *          Depending on the UUIDs that are discovered, this function should forward the events
 *          to their respective services.
 *
 * @param[in] p_event  Pointer to the database discovery event.
 */
static void db_disc_handler(ble_db_discovery_evt_t *p_evt) {
  ble_hrs_on_db_disc_evt(&m_hrs_c, p_evt);
  ble_bas_on_db_disc_evt(&m_bas_c, p_evt);
}

/**@brief Function for handling Peer Manager events.
 *
 * @param[in] p_evt  Peer Manager event.
 */

static void adv_scan_start(void) {
  ret_code_t err_code;

  //check if there are no flash operations in progress
  if (!nrf_fstorage_is_busy(NULL)) {
    // Start scanning for peripherals and initiate connection to devices which
    // advertise Heart Rate or Running speed and cadence UUIDs.
    //scan_start();
    
    // Turn on the LED to signal scanning.
    bsp_board_led_on(BSP_BOARD_LED_0);

    // Start advertising.
    err_code = ble_advertising_start(&m_advertising, BLE_ADV_MODE_FAST);
    APP_ERROR_CHECK(err_code);
  }
}
static void pm_evt_handler(pm_evt_t const *p_evt) {
  pm_handler_on_pm_evt(p_evt);
  pm_handler_disconnect_on_sec_failure(p_evt);
  pm_handler_flash_clean(p_evt);

  switch (p_evt->evt_id) {
  case PM_EVT_PEERS_DELETE_SUCCEEDED:
    // Bonds are deleted. Start scanning.
    adv_scan_start();
    break;

  default:
    break;
  }
}

/**
 * @brief Function for shutdown events.
 *
 * @param[in]   event       Shutdown type.
 */
static bool shutdown_handler(nrf_pwr_mgmt_evt_t event) {
  ret_code_t err_code;

  err_code = bsp_indication_set(BSP_INDICATE_IDLE);
  APP_ERROR_CHECK(err_code);

  switch (event) {
  case NRF_PWR_MGMT_EVT_PREPARE_WAKEUP:
    // Prepare wakeup buttons.
    err_code = bsp_btn_ble_sleep_mode_prepare();
    APP_ERROR_CHECK(err_code);
    break;
  default:
    break;
  }

  return true;
}

NRF_PWR_MGMT_HANDLER_REGISTER(shutdown_handler, APP_SHUTDOWN_HANDLER_PRIORITY);

/**@brief Function for handling BLE events.
 *
 * @param[in]   p_ble_evt   Bluetooth stack event.
 * @param[in]   p_context   Unused.
 */
static void multi_qwr_conn_handle_assign(uint16_t conn_handle) {
  for (uint32_t i = 0; i < NRF_SDH_BLE_TOTAL_LINK_COUNT; i++) {
    if (m_qwr[i].conn_handle == BLE_CONN_HANDLE_INVALID) {
      ret_code_t err_code = nrf_ble_qwr_conn_handle_assign(&m_qwr[i], conn_handle);
      APP_ERROR_CHECK(err_code);
      break;
    }
  }
}
volatile uint8_t peristat=0;
static void on_ble_peripheral_evt(ble_evt_t const *p_ble_evt) {
  uint32_t err_code;

  switch (p_ble_evt->header.evt_id) {
  case BLE_GAP_EVT_CONNECTED:

    NRF_LOG_INFO("peripheral Connected");
    peristat=1;
    err_code = bsp_indication_set(BSP_INDICATE_CONNECTED);
    APP_ERROR_CHECK(err_code);
    ble_gap_phys_t const phys =
        {
        
            .rx_phys = BLE_GAP_PHY_2MBPS | BLE_GAP_PHY_1MBPS | BLE_GAP_PHY_CODED,
            .tx_phys = BLE_GAP_PHY_2MBPS | BLE_GAP_PHY_1MBPS | BLE_GAP_PHY_CODED, 
        };
        
      
   err_code = sd_ble_gap_phy_update(p_ble_evt->evt.gap_evt.conn_handle, &phys);
   APP_ERROR_CHECK(err_code);

    m_conn_handle = p_ble_evt->evt.gap_evt.conn_handle;
    multi_qwr_conn_handle_assign(p_ble_evt->evt.gap_evt.conn_handle);
    APP_ERROR_CHECK(err_code);
    break;

  case BLE_GAP_EVT_DISCONNECTED:
    NRF_LOG_INFO("Disconnected");
    peristat=0;
    // LED indication will be changed when advertising starts.
    m_conn_handle = BLE_CONN_HANDLE_INVALID;
    break;

  case BLE_GAP_EVT_PHY_UPDATE_REQUEST: {
    NRF_LOG_DEBUG("PHY update request.");
    ble_gap_phys_t const phys =
        {
        
            .rx_phys = BLE_GAP_PHY_2MBPS | BLE_GAP_PHY_1MBPS | BLE_GAP_PHY_CODED,
            .tx_phys = BLE_GAP_PHY_2MBPS | BLE_GAP_PHY_1MBPS | BLE_GAP_PHY_CODED, 
        };
        
      
    err_code = sd_ble_gap_phy_update(p_ble_evt->evt.gap_evt.conn_handle, &phys);
    APP_ERROR_CHECK(err_code);
  } break;

  case BLE_GAP_EVT_SEC_PARAMS_REQUEST:
    // Pairing not supported
    err_code = sd_ble_gap_sec_params_reply(m_conn_handle, BLE_GAP_SEC_STATUS_PAIRING_NOT_SUPP, NULL, NULL);
    APP_ERROR_CHECK(err_code);
    break;

  case BLE_GATTS_EVT_SYS_ATTR_MISSING:
    // No system attributes have been stored.
    err_code = sd_ble_gatts_sys_attr_set(m_conn_handle, NULL, 0, 0);
    APP_ERROR_CHECK(err_code);
    break;

  case BLE_GATTC_EVT_TIMEOUT:
    // Disconnect on GATT Client timeout event.
    err_code = sd_ble_gap_disconnect(p_ble_evt->evt.gattc_evt.conn_handle,
    BLE_HCI_REMOTE_USER_TERMINATED_CONNECTION);
    APP_ERROR_CHECK(err_code);
    break;

  case BLE_GATTS_EVT_TIMEOUT:
    // Disconnect on GATT Server timeout event.
    err_code = sd_ble_gap_disconnect(p_ble_evt->evt.gatts_evt.conn_handle,
        BLE_HCI_REMOTE_USER_TERMINATED_CONNECTION);
    APP_ERROR_CHECK(err_code);
    break;

  default:
    // No implementation needed.
    break;
  }
}

static void on_ble_central_evt(ble_evt_t const *p_ble_evt) {
  ret_code_t err_code;
  ble_gap_evt_t const *p_gap_evt = &p_ble_evt->evt.gap_evt;

  switch (p_ble_evt->header.evt_id) {
  // Upon connection, check which peripheral is connected (HR or RSC), initiate DB
  // discovery, update LEDs status, and resume scanning, if necessary.
  case BLE_GAP_EVT_CONNECTED: {
    NRF_LOG_INFO("Central connected");
    // If no Heart Rate sensor or RSC sensor is currently connected, try to find them on this peripheral.
    if ((m_conn_handle_hrs_c == BLE_CONN_HANDLE_INVALID) || (m_conn_handle_rscs_c == BLE_CONN_HANDLE_INVALID)) {
      NRF_LOG_INFO("Attempt to find HRS or RSC on conn_handle 0x%x", p_gap_evt->conn_handle);

      err_code = ble_db_discovery_start(&m_db_disc[0], p_gap_evt->conn_handle);
      if (err_code == NRF_ERROR_BUSY) {
        err_code = ble_db_discovery_start(&m_db_disc[1], p_gap_evt->conn_handle);
        APP_ERROR_CHECK(err_code);
      } else {
        APP_ERROR_CHECK(err_code);
      }
    }

    // Assign connection handle to the QWR module.
    multi_qwr_conn_handle_assign(p_gap_evt->conn_handle);

    // Update LEDs status, and check whether to look for more peripherals to connect to.
    bsp_board_led_on(BSP_BOARD_LED_1);
    if (ble_conn_state_central_conn_count() == NRF_SDH_BLE_CENTRAL_LINK_COUNT) {
      bsp_board_led_off(BSP_BOARD_LED_0);
    } else {
      // Resume scanning.
      bsp_board_led_on(BSP_BOARD_LED_0);
      scan_start();
    }
  } break; // BLE_GAP_EVT_CONNECTED

  // Upon disconnection, reset the connection handle of the peer that disconnected,
  // update the LEDs status and start scanning again.
  case BLE_GAP_EVT_DISCONNECTED: {
    if (p_gap_evt->conn_handle == m_conn_handle_hrs_c) {
      NRF_LOG_INFO("HRS central disconnected (reason: %d)",
          p_gap_evt->params.disconnected.reason);

      m_conn_handle_hrs_c = BLE_CONN_HANDLE_INVALID;

      err_code = nrf_ble_scan_filter_set(&m_scan,
          SCAN_UUID_FILTER,
          &m_adv_uuids[HART_RATE_SERVICE_UUID_IDX]);
      APP_ERROR_CHECK(err_code);
      
    }

    if ((m_conn_handle_rscs_c == BLE_CONN_HANDLE_INVALID) || (m_conn_handle_hrs_c == BLE_CONN_HANDLE_INVALID)) {
      // Start scanning.
      scan_start();

      // Update LEDs status.
      bsp_board_led_on(BSP_BOARD_LED_0);
    }

    if (ble_conn_state_central_conn_count() == 0) {
      bsp_board_led_off(BSP_BOARD_LED_1);
    }
  } break; // BLE_GAP_EVT_DISCONNECTED

  case BLE_GAP_EVT_TIMEOUT: {
    // No timeout for scanning is specified, so only connection attemps can timeout.
    if (p_gap_evt->params.timeout.src == BLE_GAP_TIMEOUT_SRC_CONN) {
      NRF_LOG_INFO("Connection Request timed out.");
    }
  } break;

  case BLE_GAP_EVT_CONN_PARAM_UPDATE_REQUEST: {
    // Accept parameters requested by peer.
    err_code = sd_ble_gap_conn_param_update(p_gap_evt->conn_handle,
        &p_gap_evt->params.conn_param_update_request.conn_params);
    APP_ERROR_CHECK(err_code);
  } break;

  case BLE_GAP_EVT_PHY_UPDATE_REQUEST: {
    NRF_LOG_DEBUG("PHY update request.");
    ble_gap_phys_t const phys =
        {
            .rx_phys = BLE_GAP_PHY_2MBPS | BLE_GAP_PHY_1MBPS | BLE_GAP_PHY_CODED,
            .tx_phys = BLE_GAP_PHY_2MBPS | BLE_GAP_PHY_1MBPS | BLE_GAP_PHY_CODED,
        };
    err_code = sd_ble_gap_phy_update(p_ble_evt->evt.gap_evt.conn_handle, &phys);
    APP_ERROR_CHECK(err_code);
  } break;

  case BLE_GATTC_EVT_TIMEOUT:
    // Disconnect on GATT Client timeout event.
    NRF_LOG_DEBUG("GATT Client Timeout.");
    err_code = sd_ble_gap_disconnect(p_ble_evt->evt.gattc_evt.conn_handle,
        BLE_HCI_REMOTE_USER_TERMINATED_CONNECTION);
    APP_ERROR_CHECK(err_code);
    break;

  case BLE_GATTS_EVT_TIMEOUT:
    // Disconnect on GATT Server timeout event.
    NRF_LOG_DEBUG("GATT Server Timeout.");
    err_code = sd_ble_gap_disconnect(p_ble_evt->evt.gatts_evt.conn_handle,
        BLE_HCI_REMOTE_USER_TERMINATED_CONNECTION);
    APP_ERROR_CHECK(err_code);
    break;

  default:
    // No implementation needed.
    break;
  }
}

/**@brief   Function for handling BLE events from peripheral applications.
 * @details Updates the status LEDs used to report the activity of the peripheral applications.
 *
 * @param[in]   p_ble_evt   Bluetooth stack event.
 */

static bool ble_evt_is_advertising_timeout(ble_evt_t const *p_ble_evt) {
  return (p_ble_evt->header.evt_id == BLE_GAP_EVT_ADV_SET_TERMINATED);
}
static void ble_evt_handler(ble_evt_t const *p_ble_evt, void *p_context) {
  uint16_t conn_handle = p_ble_evt->evt.gap_evt.conn_handle;
  uint16_t role = ble_conn_state_role(conn_handle);

  // Based on the role this device plays in the connection, dispatch to the right handler.
  if (role == BLE_GAP_ROLE_PERIPH || ble_evt_is_advertising_timeout(p_ble_evt)) {
    //ble_hrs_on_ble_evt(p_ble_evt, &m_hrs);
    ble_nus_on_ble_evt(p_ble_evt, &m_nus);
    on_ble_peripheral_evt(p_ble_evt);
  } else if ((role == BLE_GAP_ROLE_CENTRAL) || (p_ble_evt->header.evt_id == BLE_GAP_EVT_ADV_REPORT)) {
    ble_hrs_c_on_ble_evt(p_ble_evt, &m_hrs_c);
    //ble_nus_on_ble_evt(p_ble_evt,&m_nus);
    on_ble_central_evt(p_ble_evt);
  }
}

/**@brief SoftDevice SoC event handler.
 *
 * @param[in]   evt_id      SoC event.
 * @param[in]   p_context   Context.
 */
static void soc_evt_handler(uint32_t evt_id, void *p_context) {
  switch (evt_id) {
  case NRF_EVT_FLASH_OPERATION_SUCCESS:
    /* fall through */
  case NRF_EVT_FLASH_OPERATION_ERROR:

    if (m_memory_access_in_progress) {
      m_memory_access_in_progress = false;
      scan_start();
    }
    break;

  default:
    // No implementation needed.
    break;
  }
}
/**@brief Function for initializing the BLE stack.
 *
 * @details Initializes the SoftDevice and the BLE event interrupt.
 */
static void ble_stack_init(void) {
  ret_code_t err_code;

  err_code = nrf_sdh_enable_request();
  APP_ERROR_CHECK(err_code);

  // Configure the BLE stack using the default settings.
  // Fetch the start address of the application RAM.
  uint32_t ram_start = 0;
  err_code = nrf_sdh_ble_default_cfg_set(APP_BLE_CONN_CFG_TAG, &ram_start);
  APP_ERROR_CHECK(err_code);

  // Enable BLE stack.
  err_code = nrf_sdh_ble_enable(&ram_start);
  NRF_LOG_INFO("%d", err_code);
  APP_ERROR_CHECK(err_code);

  // Register handlers for BLE and SoC events.
  NRF_SDH_BLE_OBSERVER(m_ble_observer, APP_BLE_OBSERVER_PRIO, ble_evt_handler, NULL);
  NRF_SDH_SOC_OBSERVER(m_soc_observer, APP_SOC_OBSERVER_PRIO, soc_evt_handler, NULL);
}

/**@brief Function for the Peer Manager initialization.
 */
static void peer_manager_init(void) {
  ble_gap_sec_params_t sec_param;
  ret_code_t err_code;

  err_code = pm_init();
  APP_ERROR_CHECK(err_code);

  memset(&sec_param, 0, sizeof(ble_gap_sec_params_t));

  // Security parameters to be used for all security procedures.
  sec_param.bond = SEC_PARAM_BOND;
  sec_param.mitm = SEC_PARAM_MITM;
  sec_param.lesc = SEC_PARAM_LESC;
  sec_param.keypress = SEC_PARAM_KEYPRESS;
  sec_param.io_caps = SEC_PARAM_IO_CAPABILITIES;
  sec_param.oob = SEC_PARAM_OOB;
  sec_param.min_key_size = SEC_PARAM_MIN_KEY_SIZE;
  sec_param.max_key_size = SEC_PARAM_MAX_KEY_SIZE;
  sec_param.kdist_own.enc = 1;
  sec_param.kdist_own.id = 1;
  sec_param.kdist_peer.enc = 1;
  sec_param.kdist_peer.id = 1;

  err_code = pm_sec_params_set(&sec_param);
  APP_ERROR_CHECK(err_code);

  err_code = pm_register(pm_evt_handler);
  APP_ERROR_CHECK(err_code);
}

/** @brief Clear bonding information from persistent storage
 */
static void delete_bonds(void) {
  ret_code_t err_code;


  NRF_LOG_INFO("Erase bonds!");

  err_code = pm_peers_delete();
  APP_ERROR_CHECK(err_code);
}

/**@brief Function for disabling the use of whitelist for scanning.
 */
static void whitelist_disable(void) {
  if (!m_whitelist_disabled) {
    NRF_LOG_INFO("Whitelist temporarily disabled.");
    m_whitelist_disabled = true;
    nrf_ble_scan_stop();
    scan_start();
  }
}

/**@brief Function for handling events from the BSP module.
 *
 * @param[in]   event   Event generated by button press.
 */
void bsp_event_handler(bsp_event_t event) {
  ret_code_t err_code;

  switch (event) {
  case BSP_EVENT_SLEEP:
    nrf_pwr_mgmt_shutdown(NRF_PWR_MGMT_SHUTDOWN_GOTO_SYSOFF);
    break;

  case BSP_EVENT_DISCONNECT:
    err_code = sd_ble_gap_disconnect(m_conn_handle, BLE_HCI_REMOTE_USER_TERMINATED_CONNECTION);
    if (err_code != NRF_ERROR_INVALID_STATE) {
      APP_ERROR_CHECK(err_code);
    }
    break;

  case BSP_EVENT_WHITELIST_OFF:
    whitelist_disable();
    break;

  default:
    break;
  }
}

/**@brief Heart Rate Collector Handler.
 */
static void hrs_c_evt_handler(ble_hrs_c_t *p_hrs_c, ble_hrs_c_evt_t *p_hrs_c_evt) {
  NRF_LOG_INFO("hrs_c_evt_handler");
  ret_code_t err_code;

  switch (p_hrs_c_evt->evt_type) {
  case BLE_HRS_C_EVT_DISCOVERY_COMPLETE: {
    NRF_LOG_DEBUG("Heart rate service discovered.");

    err_code = ble_hrs_c_handles_assign(p_hrs_c,
        p_hrs_c_evt->conn_handle,
        &p_hrs_c_evt->params.peer_db);
    APP_ERROR_CHECK(err_code);

    // Initiate bonding.
    err_code = pm_conn_secure(p_hrs_c_evt->conn_handle, false);
    if (err_code != NRF_ERROR_BUSY) {
      APP_ERROR_CHECK(err_code);
    }

    // Heart rate service discovered. Enable notification of Heart Rate Measurement.
    err_code = ble_hrs_c_hrm_notif_enable(p_hrs_c);
    APP_ERROR_CHECK(err_code);
  } break;

  case BLE_HRS_C_EVT_HRM_NOTIFICATION: {
    NRF_LOG_INFO("Heart Rate = %d.", p_hrs_c_evt->params.hrm.hr_value);
    heart_rate = p_hrs_c_evt->params.hrm.hr_value;

    if (p_hrs_c_evt->params.hrm.rr_intervals_cnt != 0) {
      uint32_t rr_avg = 0;
      for (uint32_t i = 0; i < p_hrs_c_evt->params.hrm.rr_intervals_cnt; i++) {
        rr_avg += p_hrs_c_evt->params.hrm.rr_intervals[i];
      }
      rr_avg = rr_avg / p_hrs_c_evt->params.hrm.rr_intervals_cnt;
      NRF_LOG_DEBUG("rr_interval (avg) = %d.", rr_avg);
    }
  } break;

  default:
    break;
  }
}

/**@brief Battery level Collector Handler.
 */
static void bas_c_evt_handler(ble_bas_c_t *p_bas_c, ble_bas_c_evt_t *p_bas_c_evt) {
  NRF_LOG_INFO("bas_c_evt_handler");
  ret_code_t err_code;

  switch (p_bas_c_evt->evt_type) {
  case BLE_BAS_C_EVT_DISCOVERY_COMPLETE: {
    err_code = ble_bas_c_handles_assign(p_bas_c,
        p_bas_c_evt->conn_handle,
        &p_bas_c_evt->params.bas_db);
    APP_ERROR_CHECK(err_code);

    // Battery service discovered. Enable notification of Battery Level.
    NRF_LOG_DEBUG("Battery Service discovered. Reading battery level.");

    err_code = ble_bas_c_bl_read(p_bas_c);
    APP_ERROR_CHECK(err_code);

    NRF_LOG_DEBUG("Enabling Battery Level Notification.");
    err_code = ble_bas_c_bl_notif_enable(p_bas_c);
    APP_ERROR_CHECK(err_code);

  } break;

  case BLE_BAS_C_EVT_BATT_NOTIFICATION:
    NRF_LOG_INFO("Battery Level received %d %%.", p_bas_c_evt->params.battery_level);
    break;

  case BLE_BAS_C_EVT_BATT_READ_RESP:
    NRF_LOG_INFO("Battery Level Read as %d %%.", p_bas_c_evt->params.battery_level);
    break;

  default:
    break;
  }
}

/**
 * @brief Heart rate collector initialization.
 */
static void hrs_c_init(void) {
  NRF_LOG_INFO("HRS_C_INIT");
  ble_hrs_c_init_t hrs_c_init_obj;

  hrs_c_init_obj.evt_handler = hrs_c_evt_handler;
  hrs_c_init_obj.error_handler = service_error_handler;
  hrs_c_init_obj.p_gatt_queue = &m_ble_gatt_queue;

  ret_code_t err_code = ble_hrs_c_init(&m_hrs_c, &hrs_c_init_obj);
  APP_ERROR_CHECK(err_code);
}

/**
 * @brief Battery level collector initialization.
 */
static void bas_c_init(void) {
  NRF_LOG_INFO("BAS_C_INIT");
  ble_bas_c_init_t bas_c_init_obj;

  bas_c_init_obj.evt_handler = bas_c_evt_handler;
  bas_c_init_obj.error_handler = service_error_handler;
  bas_c_init_obj.p_gatt_queue = &m_ble_gatt_queue;

  ret_code_t err_code = ble_bas_c_init(&m_bas_c, &bas_c_init_obj);
  APP_ERROR_CHECK(err_code);
}

/**
 * @brief Database discovery collector initialization.
 */
static void db_discovery_init(void) {
  ble_db_discovery_init_t db_init;

  memset(&db_init, 0, sizeof(db_init));

  db_init.evt_handler = db_disc_handler;
  db_init.p_gatt_queue = &m_ble_gatt_queue;

  ret_code_t err_code = ble_db_discovery_init(&db_init);

  APP_ERROR_CHECK(err_code);
}

/**@brief Retrieve a list of peer manager peer IDs.
 *
 * @param[inout] p_peers   The buffer where to store the list of peer IDs.
 * @param[inout] p_size    In: The size of the @p p_peers buffer.
 *                         Out: The number of peers copied in the buffer.
 */
static void peer_list_get(pm_peer_id_t *p_peers, uint32_t *p_size) {
  pm_peer_id_t peer_id;
  uint32_t peers_to_copy;

  peers_to_copy = (*p_size < BLE_GAP_WHITELIST_ADDR_MAX_COUNT) ? *p_size : BLE_GAP_WHITELIST_ADDR_MAX_COUNT;

  peer_id = pm_next_peer_id_get(PM_PEER_ID_INVALID);
  *p_size = 0;

  while ((peer_id != PM_PEER_ID_INVALID) && (peers_to_copy--)) {
    p_peers[(*p_size)++] = peer_id;
    peer_id = pm_next_peer_id_get(peer_id);
  }
}

/**@brief Function to start scanning.
 */
static void scan_start(void) {
  ret_code_t err_code;

  if (nrf_fstorage_is_busy(NULL)) {
    m_memory_access_in_progress = true;
    return;
  }

  NRF_LOG_INFO("Starting scan.");

  err_code = nrf_ble_scan_start(&m_scan);
  APP_ERROR_CHECK(err_code);

  err_code = bsp_indication_set(BSP_INDICATE_SCANNING);
  NRF_LOG_INFO("%d", err_code);
  APP_ERROR_CHECK(err_code);
}

/**@brief Function for initializing buttons and leds.
 *
 * @param[out] p_erase_bonds  Will be true if the clear bonding button was pressed to wake the application up.
 */
static void buttons_leds_init(bool *p_erase_bonds) {
  ret_code_t err_code;
  bsp_event_t startup_event;

  err_code = bsp_init(BSP_INIT_LEDS | BSP_INIT_BUTTONS, bsp_event_handler);
  APP_ERROR_CHECK(err_code);

  err_code = bsp_btn_ble_init(NULL, &startup_event);
  APP_ERROR_CHECK(err_code);

  *p_erase_bonds = (startup_event == BSP_EVENT_CLEAR_BONDING_DATA);
}

/**@brief Function for initializing the nrf log module.
 */
static void log_init(void) {
  ret_code_t err_code = NRF_LOG_INIT(NULL);
  APP_ERROR_CHECK(err_code);

  NRF_LOG_DEFAULT_BACKENDS_INIT();
}

/**@brief Function for initializing the power management module. */
static void power_management_init(void) {
  ret_code_t err_code;
  err_code = nrf_pwr_mgmt_init();
  APP_ERROR_CHECK(err_code);
}

/**@brief GATT module event handler.
 */
static void gatt_evt_handler(nrf_ble_gatt_t *p_gatt, nrf_ble_gatt_evt_t const *p_evt) {

  if ((m_conn_handle == p_evt->conn_handle) && (p_evt->evt_id == NRF_BLE_GATT_EVT_ATT_MTU_UPDATED)) {
    m_ble_nus_max_data_len = p_evt->params.att_mtu_effective - OPCODE_LENGTH - HANDLE_LENGTH;
    NRF_LOG_INFO("Data len is set to 0x%X(%d)", m_ble_nus_max_data_len, m_ble_nus_max_data_len);
  }
  NRF_LOG_DEBUG("ATT MTU exchange completed. central 0x%x peripheral 0x%x",
      p_gatt->att_mtu_desired_central,
      p_gatt->att_mtu_desired_periph);
  switch (p_evt->evt_id) {
  case NRF_BLE_GATT_EVT_ATT_MTU_UPDATED: {
    NRF_LOG_INFO("GATT ATT MTU on connection 0x%x changed to %d.",
        p_evt->conn_handle,
        p_evt->params.att_mtu_effective);
  } break;

  case NRF_BLE_GATT_EVT_DATA_LENGTH_UPDATED: {
    NRF_LOG_INFO("Data length for connection 0x%x updated to %d.",
        p_evt->conn_handle,
        p_evt->params.data_length);
  } break;

  default:
    break;
  }
}
static void whitelist_load()
{
    ret_code_t   ret;
    pm_peer_id_t peers[8];
    uint32_t     peer_cnt;

    memset(peers, PM_PEER_ID_INVALID, sizeof(peers));
    peer_cnt = (sizeof(peers) / sizeof(pm_peer_id_t));

    // Load all peers from flash and whitelist them.
    peer_list_get(peers, &peer_cnt);

    ret = pm_whitelist_set(peers, peer_cnt);
    APP_ERROR_CHECK(ret);

    // Setup the device identies list.
    // Some SoftDevices do not support this feature.
    ret = pm_device_identities_list_set(peers, peer_cnt);
    if (ret != NRF_ERROR_NOT_SUPPORTED)
    {
        APP_ERROR_CHECK(ret);
    }
}
static void on_whitelist_req(void)
{
    ret_code_t err_code;

    // Whitelist buffers.
    ble_gap_addr_t whitelist_addrs[8];
    ble_gap_irk_t  whitelist_irks[8];

    memset(whitelist_addrs, 0x00, sizeof(whitelist_addrs));
    memset(whitelist_irks,  0x00, sizeof(whitelist_irks));

    uint32_t addr_cnt = (sizeof(whitelist_addrs) / sizeof(ble_gap_addr_t));
    uint32_t irk_cnt  = (sizeof(whitelist_irks)  / sizeof(ble_gap_irk_t));

    // Reload the whitelist and whitelist all peers.
    whitelist_load();

    // Get the whitelist previously set using pm_whitelist_set().
    err_code = pm_whitelist_get(whitelist_addrs, &addr_cnt,
                                whitelist_irks,  &irk_cnt);

    if (((addr_cnt == 0) && (irk_cnt == 0)) ||
        (m_whitelist_disabled))
    {
        // Don't use whitelist.
        err_code = nrf_ble_scan_params_set(&m_scan, NULL);
        APP_ERROR_CHECK(err_code);
    }
}
static void scan_evt_handler(scan_evt_t const *p_scan_evt) {
  ret_code_t err_code;
    switch(p_scan_evt->scan_evt_id)
    {
        case NRF_BLE_SCAN_EVT_WHITELIST_REQUEST:
        {
            on_whitelist_req();
            m_whitelist_disabled = false;
        } break;

        case NRF_BLE_SCAN_EVT_CONNECTING_ERROR:
        {
            err_code = p_scan_evt->params.connecting_err.err_code;
            APP_ERROR_CHECK(err_code);
        } break;

        case NRF_BLE_SCAN_EVT_SCAN_TIMEOUT:
        {
            NRF_LOG_INFO("Scan timed out.");
            scan_start();
        } break;

        case NRF_BLE_SCAN_EVT_FILTER_MATCH:
            break;
        case NRF_BLE_SCAN_EVT_WHITELIST_ADV_REPORT:
            break;

        default:
          break;
    }
}

/**@brief Function for initializing the timer.
 */
static void timer_init(void) {
  ret_code_t err_code = app_timer_init();
  APP_ERROR_CHECK(err_code);
}

/**@brief Function for initializing the GATT module.
 */
static void gatt_init(void) {
  ret_code_t err_code = nrf_ble_gatt_init(&m_gatt, gatt_evt_handler);
  APP_ERROR_CHECK(err_code);

  err_code = nrf_ble_gatt_att_mtu_periph_set(&m_gatt, NRF_SDH_BLE_GATT_MAX_MTU_SIZE);
  APP_ERROR_CHECK(err_code);
  err_code = nrf_ble_gatt_data_length_set(&m_gatt, BLE_CONN_HANDLE_INVALID , NRF_SDH_BLE_GAP_DATA_LENGTH);
  APP_ERROR_CHECK(err_code);

}

/**@brief Function for initialization scanning and setting filters.
 */
static void scan_init(void) {
  ret_code_t err_code;
  nrf_ble_scan_init_t init_scan;

  memset(&init_scan, 0, sizeof(init_scan));

  init_scan.p_scan_param = &m_scan_param;
  init_scan.connect_if_match = true;
  init_scan.conn_cfg_tag = APP_BLE_CONN_CFG_TAG;

  err_code = nrf_ble_scan_init(&m_scan, &init_scan, scan_evt_handler);
  APP_ERROR_CHECK(err_code);

  ble_uuid_t uuid =
      {
          .uuid = TARGET_UUID,
          .type = BLE_UUID_TYPE_BLE,
      };

  err_code = nrf_ble_scan_filter_set(&m_scan,
      SCAN_UUID_FILTER,
      &uuid);
  APP_ERROR_CHECK(err_code);

  if (strlen(m_target_periph_name) != 0) {
    err_code = nrf_ble_scan_filter_set(&m_scan,
        SCAN_NAME_FILTER,
        m_target_periph_name);
    APP_ERROR_CHECK(err_code);
  }

  if (is_connect_per_addr) {
    err_code = nrf_ble_scan_filter_set(&m_scan,
        SCAN_ADDR_FILTER,
        m_target_periph_addr.addr);
    APP_ERROR_CHECK(err_code);
  }

  err_code = nrf_ble_scan_filters_enable(&m_scan,
      NRF_BLE_SCAN_ALL_FILTER,
      false);
  APP_ERROR_CHECK(err_code);
}

/**@brief Function for handling the idle state (main loop).
 *
 * @details Handle any pending log operation(s), then sleep until the next event occurs.
 */
static void idle_state_handle(void) {
  ret_code_t err_code;

  err_code = nrf_ble_lesc_request_handler();
  APP_ERROR_CHECK(err_code);

  NRF_LOG_FLUSH();
  nrf_pwr_mgmt_run();
}

/**@brief Function for starting a scan, or instead trigger it from peer manager (after
 *        deleting bonds).
 *
 * @param[in] p_erase_bonds Pointer to a bool to determine if bonds will be deleted before scanning.
 */
void scanning_start(bool *p_erase_bonds) {
  // Start scanning for peripherals and initiate connection
  // with devices that advertise GATT Service UUID.
  if (*p_erase_bonds == true) {
    // Scan is started by the PM_EVT_PEERS_DELETE_SUCCEEDED event.
    delete_bonds();
  } else {
    scan_start();
  }
}

static void gpio_init(void) {
  ret_code_t err_code;
  NRF_LOG_INFO("INIT gpio");

  nrf_drv_gpiote_out_config_t out_config = GPIOTE_CONFIG_OUT_SIMPLE(false);

  err_code = nrf_drv_gpiote_out_init(PIN_OUT, &out_config);
  APP_ERROR_CHECK(err_code);

  nrf_drv_gpiote_in_event_enable(PIN_IN, true);
}

static void gap_params_init(void) {
  ret_code_t err_code;
  ble_gap_conn_params_t gap_conn_params;
  ble_gap_conn_sec_mode_t sec_mode;

  BLE_GAP_CONN_SEC_MODE_SET_OPEN(&sec_mode);

  err_code = sd_ble_gap_device_name_set(&sec_mode,
      (const uint8_t *)DEVICE_NAME,
      strlen(DEVICE_NAME));
  APP_ERROR_CHECK(err_code);

  memset(&gap_conn_params, 0, sizeof(gap_conn_params));

  gap_conn_params.min_conn_interval = MIN_CONN_INTERVAL;
  gap_conn_params.max_conn_interval = MAX_CONN_INTERVAL;
  gap_conn_params.slave_latency = SLAVE_LATENCY;
  gap_conn_params.conn_sup_timeout = CONN_SUP_TIMEOUT;

  err_code = sd_ble_gap_ppcp_set(&gap_conn_params);
  APP_ERROR_CHECK(err_code);
}
static void on_conn_params_evt(ble_conn_params_evt_t *p_evt) {
  uint32_t err_code;

  if (p_evt->evt_type == BLE_CONN_PARAMS_EVT_FAILED) {
    err_code = sd_ble_gap_disconnect(m_conn_handle, BLE_HCI_CONN_INTERVAL_UNACCEPTABLE);
    APP_ERROR_CHECK(err_code);
  }
}

static void conn_params_error_handler(uint32_t nrf_error) {
  APP_ERROR_HANDLER(nrf_error);
}

static void conn_params_init(void) {
  uint32_t err_code;
  ble_conn_params_init_t cp_init;

  memset(&cp_init, 0, sizeof(cp_init));

  cp_init.p_conn_params = NULL;
  cp_init.first_conn_params_update_delay = FIRST_CONN_PARAMS_UPDATE_DELAY;
  cp_init.next_conn_params_update_delay = NEXT_CONN_PARAMS_UPDATE_DELAY;
  cp_init.max_conn_params_update_count = MAX_CONN_PARAMS_UPDATE_COUNT;
  cp_init.start_on_notify_cccd_handle = BLE_GATT_HANDLE_INVALID;
  cp_init.disconnect_on_fail = false;
  cp_init.evt_handler = on_conn_params_evt;
  cp_init.error_handler = conn_params_error_handler;

  err_code = ble_conn_params_init(&cp_init);
  APP_ERROR_CHECK(err_code);
}

void uart_event_handle(app_uart_evt_t *p_event) {
  static uint8_t data_array[BLE_NUS_MAX_DATA_LEN];
  static uint8_t index = 0;
  uint32_t err_code;

  switch (p_event->evt_type) {
  case APP_UART_DATA_READY:
    NRF_LOG_INFO("uart event handle");
    UNUSED_VARIABLE(app_uart_get(&data_array[index]));
    index++;

    if ((data_array[index - 1] == '\n') ||
        (data_array[index - 1] == '\r') ||
        (index >= m_ble_nus_max_data_len)) {
      if (index > 1) {
        NRF_LOG_INFO("uart send handle");
        NRF_LOG_DEBUG("Ready to send data over BLE NUS");
        NRF_LOG_HEXDUMP_DEBUG(data_array, index);

        do {
          uint16_t length = (uint16_t)index;
          err_code = ble_nus_data_send(&m_nus, data_array, &length, m_conn_handle);
          NRF_LOG_INFO("%d", err_code);

          if ((err_code != NRF_ERROR_INVALID_STATE) &&
              (err_code != NRF_ERROR_RESOURCES) &&
              (err_code != NRF_ERROR_NOT_FOUND)) {
            APP_ERROR_CHECK(err_code);
          }
        } while (err_code == NRF_ERROR_RESOURCES);
      }

      index = 0;
    }
    break;

  case APP_UART_COMMUNICATION_ERROR:
    APP_ERROR_HANDLER(p_event->data.error_communication);
    break;

  case APP_UART_FIFO_ERROR:
    APP_ERROR_HANDLER(p_event->data.error_code);
    break;

  default:
    break;
  }
}
/**@snippet [Handling the data received over UART] */

#define UART_TX_BUF_SIZE 256 /**< UART TX buffer size. */
#define UART_RX_BUF_SIZE 256
/**@brief  Function for initializing the UART module.
 */
/**@snippet [UART Initialization] */
static void uart_init(void) {
  uint32_t err_code;
  app_uart_comm_params_t const comm_params =
  {
    .rx_pin_no = RX_PIN_NUMBER,
    .tx_pin_no = TX_PIN_NUMBER,
    .rts_pin_no = RTS_PIN_NUMBER,
    .cts_pin_no = CTS_PIN_NUMBER,
    .flow_control = APP_UART_FLOW_CONTROL_DISABLED,
    .use_parity = false,
#if defined(UART_PRESENT)
    .baud_rate = NRF_UART_BAUDRATE_115200
#else
    .baud_rate = NRF_UARTE_BAUDRATE_115200
#endif
  };

  APP_UART_FIFO_INIT(&comm_params,
      UART_RX_BUF_SIZE,
      UART_TX_BUF_SIZE,
      uart_event_handle,
      APP_IRQ_PRIORITY_LOWEST,
      err_code);
  APP_ERROR_CHECK(err_code);
}
static void nrf_qwr_error_handler(uint32_t nrf_error) {
  APP_ERROR_HANDLER(nrf_error);
}
static void nus_data_handler(ble_nus_evt_t *p_evt) {

  if (p_evt->type == BLE_NUS_EVT_RX_DATA) {
    uint32_t err_code;
    nrf_delay_ms(10);
    NRF_LOG_DEBUG("Received data from BLE NUS. Writing data on UART.");
    NRF_LOG_INFO("rom BLE NUS. ");
    NRF_LOG_HEXDUMP_DEBUG(p_evt->params.rx_data.p_data, p_evt->params.rx_data.length);

    for (uint32_t i = 0; i < p_evt->params.rx_data.length; i++) {
      NRF_LOG_INFO("1 ");
      do {
        err_code = app_uart_put(p_evt->params.rx_data.p_data[i]);
        if ((err_code != NRF_SUCCESS) && (err_code != NRF_ERROR_BUSY)) {
          NRF_LOG_ERROR("Failed receiving NUS message. Error 0x%x. ", err_code);
          APP_ERROR_CHECK(err_code);
        }
      } while (err_code == NRF_ERROR_BUSY);
    }
    if (p_evt->params.rx_data.p_data[p_evt->params.rx_data.length - 1] == '\r') {
      while (app_uart_put('\n') == NRF_ERROR_BUSY)
        ;
    }
  }
}
static void sleep_mode_enter(void) {
  uint32_t err_code = bsp_indication_set(BSP_INDICATE_IDLE);
  APP_ERROR_CHECK(err_code);

  // Prepare wakeup buttons.
  err_code = bsp_btn_ble_sleep_mode_prepare();
  APP_ERROR_CHECK(err_code);

  // Go to system-off mode (this function will not return; wakeup will cause a reset).
  err_code = sd_power_system_off();
  APP_ERROR_CHECK(err_code);
}
static void services_init(void) {
  uint32_t err_code;
  ble_nus_init_t nus_init;
  nrf_ble_qwr_init_t qwr_init = {0};

  // Initialize Queued Write Module.
  qwr_init.error_handler = nrf_qwr_error_handler;

  for (uint32_t i = 0; i < NRF_SDH_BLE_TOTAL_LINK_COUNT; i++) {
    err_code = nrf_ble_qwr_init(&m_qwr[i], &qwr_init);
    APP_ERROR_CHECK(err_code);
  }

  // Initialize NUS.
  memset(&nus_init, 0, sizeof(nus_init));

  nus_init.data_handler = nus_data_handler;

  err_code = ble_nus_init(&m_nus, &nus_init);
  APP_ERROR_CHECK(err_code);
}
static void on_adv_evt(ble_adv_evt_t ble_adv_evt) {
  uint32_t err_code;

  switch (ble_adv_evt) {
  case BLE_ADV_EVT_FAST:
    err_code = bsp_indication_set(BSP_INDICATE_ADVERTISING);
    APP_ERROR_CHECK(err_code);
    break;
  case BLE_ADV_EVT_IDLE:
    sleep_mode_enter();
    break;
  default:
    break;
  }
}

static void advertising_init(void) {
  uint32_t err_code;
  ble_advertising_init_t init;

  memset(&init, 0, sizeof(init));

  init.advdata.name_type = BLE_ADVDATA_FULL_NAME;
  init.advdata.include_appearance = false;
  init.advdata.flags = BLE_GAP_ADV_FLAGS_LE_ONLY_LIMITED_DISC_MODE;

  init.srdata.uuids_complete.uuid_cnt = sizeof(m_adv_uuids) / sizeof(m_adv_uuids[0]);
  init.srdata.uuids_complete.p_uuids = m_adv_uuids;

  init.config.ble_adv_fast_enabled = true;
  init.config.ble_adv_fast_interval = APP_ADV_INTERVAL;
  init.config.ble_adv_fast_timeout = APP_ADV_DURATION;
  init.evt_handler = on_adv_evt;

  err_code = ble_advertising_init(&m_advertising, &init);
  APP_ERROR_CHECK(err_code);

  ble_advertising_conn_cfg_tag_set(&m_advertising, APP_BLE_CONN_CFG_TAG);
}

static void advertising_start(void) {
  uint32_t err_code = ble_advertising_start(&m_advertising, BLE_ADV_MODE_FAST);
  APP_ERROR_CHECK(err_code);
}

void conn_evt_len_ext_set(void)
{
    ret_code_t err_code;
    ble_opt_t  opt;

    memset(&opt, 0x00, sizeof(opt));
    opt.common_opt.conn_evt_ext.enable = 1;

    err_code = sd_ble_opt_set(BLE_COMMON_OPT_CONN_EVT_EXT, &opt);
    APP_ERROR_CHECK(err_code);
}
int main(void) {

  bool erase_bonds;
  uint32_t time_ms = 1; //Time(in miliseconds) between consecutive compare events.
  uint32_t time_ticks;
  
  uint8_t gyrox=0;
  uint8_t gyroy=1;
  uint8_t gyroz=2;
  uint8_t accelx=3,accely=4,accelz=5;
  uint8_t magx=2,magy=2,magz=2;
  uint16_t counter=0;
  uint8_t lat=6,lon=7,alt=8;
  static uint8_t data_array2[150];
  

  uint32_t err_code = NRF_SUCCESS;
  uart_init();
  log_init();

  timer_init();
  power_management_init();
  buttons_leds_init(&erase_bonds);
  ble_stack_init();
  conn_evt_len_ext_set();
  gatt_init();
  peer_manager_init();
  db_discovery_init();
  hrs_c_init();
  bas_c_init();
  scan_init();
  gap_params_init();
  services_init();
  advertising_init();
  conn_params_init();
  

  int store_data=1;
  int first_row = 1;
  int peristat2;
  if (erase_bonds == true) {
    delete_bonds();
  } else {
    adv_scan_start();
  }
  nrf_delay_ms(15000);
  
  for (;;) {
    
    if(peristat2==1)
    {
     if(counter<8000)
        {
                    NRF_LOG_INFO("%d",counter);
                    sprintf(data_array2,"{\"g_x\":%d,\"g_y\":%d,\"g_z\":%d,\"a_x\":%d,\"a_y\":%d,\"a_z\":%d,\"m_x\":%d,\"m_y\":%d,\"m_z\":%d,\"lat\":%d,\"lon\":%d,\"alt\":%d,\"hb\":%d}",gyrox,gyroy,gyroz,accelx,accely,accelz,magx,magy,magz,lat,lon,alt,heart_rate);
                    NRF_LOG_DEBUG("Ready to send data over BLE NUS");
                    NRF_LOG_HEXDUMP_DEBUG(data_array2, 0);
                    do
                    {
                        uint16_t length = (uint16_t)150;
                        err_code = ble_nus_data_send(&m_nus, data_array2, &length, m_conn_handle);
                        APP_ERROR_CHECK(err_code);
                        
                    } while (err_code == NRF_ERROR_RESOURCES);
                    
                      gyrox++;
                      gyroy++;
                      gyroz++;
                      accelx++;
                      accely++;
                      accelz++;
                      magx++;
                      magy++;
                      magz++;
                      counter++;
                      lon++;
                      lat++;
                      alt++;
                      }timer_call=0;
    }
    else if(store_data==1)
    {
    if(peristat==1)
    {
    fatfs_example();
    store_data=0;
    }
    }
}
}

RE: want to achieve 1-2 Mbps through BLE.

Karl Ylvisaker — Tue, 26 Oct 2021 15:07:01 GMT

Hello Mohsin khan,

[quote user="Mohsin khan"]My application includes 2 parts , One is for connecting to polar H10 and getting data and second part is sending the saved SD card data to mobile phone application . I have removed scan start function for adv_scan_start() function so its not scanning as from my Peripheral logs . From that i have concluded now its just advertising and secondly it improved throughput . [/quote]

Aha, thank you for elaborating. Scanning will decrease your throughput because it requires the to have the radio in RX mode for the entire scan window.

[quote user="Mohsin khan"]So here is code , I am trying my best to remove the things which is not readable . [/quote]

I am glad to see that you have cleaned up the code so much - well done!
I also notice that you have an APP_ERROR_CHECK in your sending loop, which likely will trigger when a NRF_ERROR_RESOURCES is generated, before you get the chance to handle it with your specific NRF_ERROR_RESOURCES error handling.

[quote user="Mohsin khan"]It was a different test logs , Application is working fine if I face any issue in the app , I will tell you . [/quote]

Ok then, that sounds fine with me.

[quote user="Mohsin khan"]I am not using nRF connect as peripheral I am just seeing data in nRF connect which is coming from NRF52840 . I am using nrf connect on my mobile phone not on desktop . [/quote]

Thank you for clarifying.

Best regards,
Karl

RE: want to achieve 1-2 Mbps through BLE.

Mohsin khan — Tue, 26 Oct 2021 06:36:37 GMT

[quote userid="87869" url="~/f/nordic-q-a/80125/want-to-achieve-1-2-mbps-through-ble/335744#335744"]Could you detail what you mean when you say that you removed the scanning command? Your application will still need to scan in order to find and connect to the peripheral[/quote]

My application includes 2 parts , One is for connecting to polar H10 and getting data and second part is sending the saved SD card data to mobile phone application . I have removed scan start function for adv_scan_start() function so its not scanning as from my Peripheral logs . From that i have concluded now its just advertising and secondly it improved throughput .

[quote userid="87869" url="~/f/nordic-q-a/80125/want-to-achieve-1-2-mbps-through-ble/335744#335744"]Briefly looking through the code you have shared I notice that it is filled with commented out sections and lines of code. This is bad practice since it makes the code a lot harder to read and understand[/quote]

So here is code , I am trying my best to remove the things which is not readable .

/**
 * Copyright (c) 2014 - 2020, Nordic Semiconductor ASA
 *
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without modification,
 * are permitted provided that the following conditions are met:
 *
 * 1. Redistributions of source code must retain the above copyright notice, this
 *    list of conditions and the following disclaimer.
 *
 * 2. Redistributions in binary form, except as embedded into a Nordic
 *    Semiconductor ASA integrated circuit in a product or a software update for
 *    such product, must reproduce the above copyright notice, this list of
 *    conditions and the following disclaimer in the documentation and/or other
 *    materials provided with the distribution.
 *
 * 3. Neither the name of Nordic Semiconductor ASA nor the names of its
 *    contributors may be used to endorse or promote products derived from this
 *    software without specific prior written permission.
 *
 * 4. This software, with or without modification, must only be used with a
 *    Nordic Semiconductor ASA integrated circuit.
 *
 * 5. Any software provided in binary form under this license must not be reverse
 *    engineered, decompiled, modified and/or disassembled.
 *
 * THIS SOFTWARE IS PROVIDED BY NORDIC SEMICONDUCTOR ASA "AS IS" AND ANY EXPRESS
 * OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
 * OF MERCHANTABILITY, NONINFRINGEMENT, AND FITNESS FOR A PARTICULAR PURPOSE ARE
 * DISCLAIMED. IN NO EVENT SHALL NORDIC SEMICONDUCTOR ASA OR CONTRIBUTORS BE
 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE
 * GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
 * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 *
 */
/**
 * @brief BLE Heart Rate Collector application main file.
 *
 * This file contains the source code for a sample heart rate collector.
 */

#include <stdbool.h>
#include <stdint.h>
#include <stdio.h>
#include <string.h>

#include "bsp.h"
#include "diskio_blkdev.h"
#include "ff.h"
#include "nrf.h"
#include "nrf_block_dev_sdc.h"
#include "nrf_delay.h"
#include "nrf_drv_gpiote.h"
#include "nrf_drv_timer.h"

#include "app_uart.h"
#include "ble_advdata.h"
#include "ble_advertising.h"
#include "ble_conn_params.h"
#include "ble_nus.h"
#include "nrf_ble_qwr.h"
#include "ble_gatts.h"

#include "app_error.h"
#include "app_timer.h"
#include "app_util.h"
#include "ble.h"
#include "ble_bas_c.h"
#include "ble_conn_state.h"
#include "ble_db_discovery.h"
#include "ble_hci.h"
#include "ble_hrs_c.h"
#include "ble_srv_common.h"
#include "bsp_btn_ble.h"
#include "fds.h"
#include "nordic_common.h"
#include "nrf_ble_gatt.h"
#include "nrf_ble_lesc.h"
#include "nrf_ble_scan.h"
#include "nrf_fstorage.h"
#include "nrf_log.h"
#include "nrf_log_ctrl.h"
#include "nrf_log_default_backends.h"
#include "nrf_pwr_mgmt.h"
#include "nrf_sdh.h"
#include "nrf_sdh_ble.h"
#include "nrf_sdh_soc.h"
#include "nrf_sdm.h"
#include "peer_manager.h"
#include "peer_manager_handler.h"

#if defined(UART_PRESENT)
#include "nrf_uart.h"
#endif
#if defined(UARTE_PRESENT)
#include "nrf_uarte.h"
#endif

#define FILE_NAME "hr.CSV"
#define TEST_STRING "SD card example."

#define NUS_SERVICE_UUID_TYPE BLE_UUID_TYPE_VENDOR_BEGIN

#ifdef BSP_BUTTON_0
#define PIN_IN BSP_BUTTON_0
#endif
#ifndef PIN_IN
#error "Please indicate input pin"
#endif

#ifdef BSP_LED_1
#define PIN_OUT BSP_LED_1
#endif
#ifndef PIN_OUT
#error "Please indicate output pin"
#endif /**< Context for the Queued Write module.*/

BLE_ADVERTISING_DEF(m_advertising);
BLE_NUS_DEF(m_nus, 6);
NRF_BLE_QWRS_DEF(m_qwr, 6);
static ble_uuid_t m_adv_uuids[] = /**< Universally unique service identifier. */
    {
        {BLE_UUID_NUS_SERVICE, NUS_SERVICE_UUID_TYPE}};

#define APP_ADV_INTERVAL 64 /**< The advertising interval (in units of 0.625 ms. This value corresponds to 40 ms). */

#define APP_ADV_DURATION 18000

volatile uint8_t button_pressed = 0;

volatile int timer_call = 0;
FRESULT ff_result;
static FIL file;

uint16_t heart_rate;
char s_heartrate[4];
volatile uint8_t c;
uint32_t bytes_written;
const nrf_drv_timer_t TIMER_LED = NRF_DRV_TIMER_INSTANCE(1);
#define SDC_SCK_PIN ARDUINO_13_PIN  ///< SDC serial clock (SCK) pin.
#define SDC_MOSI_PIN ARDUINO_11_PIN ///< SDC serial data in (DI) pin.
#define SDC_MISO_PIN ARDUINO_12_PIN ///< SDC serial data out (DO) pin.
#define SDC_CS_PIN ARDUINO_10_PIN   ///< SDC chip select (CS) pin.

#define MIN_CONN_INTERVAL                    (uint16_t)(MSEC_TO_UNITS(50, UNIT_1_25_MS)) 
#define MAX_CONN_INTERVAL                    (uint16_t)(MSEC_TO_UNITS(50, UNIT_1_25_MS))    /**< Maximum acceptable connection interval (75 ms), Connection interval uses 1.25 ms units. */
#define SLAVE_LATENCY 0                                      /**< Slave latency. */
#define CONN_SUP_TIMEOUT MSEC_TO_UNITS(4000, UNIT_10_MS)     /**< Connection supervisory timeout (4 seconds), Supervision Timeout uses 10 ms units. */
#define FIRST_CONN_PARAMS_UPDATE_DELAY APP_TIMER_TICKS(5000) /**< Time from initiating event (connect or start of notification) to first time sd_ble_gap_conn_param_update is called (5 seconds). */
#define NEXT_CONN_PARAMS_UPDATE_DELAY APP_TIMER_TICKS(30000) /**< Time between each call to sd_ble_gap_conn_param_update after the first call (30 seconds). */
#define MAX_CONN_PARAMS_UPDATE_COUNT 3

#define DEVICE_NAME "nRF Relay"
static uint16_t m_ble_nus_max_data_len = BLE_GATT_ATT_MTU_DEFAULT - 3;
#define APP_BLE_CONN_CFG_TAG 1 /**< A tag identifying the SoftDevice BLE configuration. */

#define APP_BLE_OBSERVER_PRIO 3 /**< Application's BLE observer priority. You shouldn't need to modify this value. */
#define APP_SOC_OBSERVER_PRIO 1 /**< Applications' SoC observer priority. You shouldn't need to modify this value. */

#define LESC_DEBUG_MODE 0 /**< Set to 1 to use LESC debug keys, allows you to use a sniffer to inspect traffic. */

#define SEC_PARAM_BOND 1                               /**< Perform bonding. */
#define SEC_PARAM_MITM 0                               /**< Man In The Middle protection not required. */
#define SEC_PARAM_LESC 1                               /**< LE Secure Connections enabled. */
#define SEC_PARAM_KEYPRESS 0                           /**< Keypress notifications not enabled. */
#define SEC_PARAM_IO_CAPABILITIES BLE_GAP_IO_CAPS_NONE /**< No I/O capabilities. */
#define SEC_PARAM_OOB 0                                /**< Out Of Band data not available. */
#define SEC_PARAM_MIN_KEY_SIZE 7                       /**< Minimum encryption key size in octets. */
#define SEC_PARAM_MAX_KEY_SIZE 16                      /**< Maximum encryption key size in octets. */

#define SCAN_DURATION_WITELIST 3000 /**< Duration of the scanning in units of 10 milliseconds. */
#define HART_RATE_SERVICE_UUID_IDX 0
#define TARGET_UUID BLE_UUID_HEART_RATE_SERVICE                /**< Target device uuid that application is looking for. */
static uint16_t m_conn_handle_hrs_c = BLE_CONN_HANDLE_INVALID; /**< Connection handle for the HRS central application */
static uint16_t m_conn_handle_rscs_c = BLE_CONN_HANDLE_INVALID;
char init[] = "Long,Lat,Alt,Accelx,Accely,Accelz,GYROx,GYROy,GYROz,Magx,Magy,Magz,Heartrate,Bat %  ";
char data[] = "2221";

/**@brief Macro to unpack 16bit unsigned UUID from octet stream. */
#define UUID16_EXTRACT(DST, SRC) \
  do {                           \
    (*(DST)) = (SRC)[1];         \
    (*(DST)) <<= 8;              \
    (*(DST)) |= (SRC)[0];        \
  } while (0)

NRF_BLE_GQ_DEF(m_ble_gatt_queue, /**< BLE GATT Queue instance. */
    NRF_SDH_BLE_CENTRAL_LINK_COUNT,
    NRF_BLE_GQ_QUEUE_SIZE);

BLE_HRS_C_DEF(m_hrs_c);                   /**< Structure used to identify the heart rate client module. */
BLE_BAS_C_DEF(m_bas_c);                   /**< Structure used to identify the Battery Service client module. */
NRF_BLE_GATT_DEF(m_gatt);                 /**< GATT module instance. */
BLE_DB_DISCOVERY_ARRAY_DEF(m_db_disc, 2); /**< Database discovery module instances. */
NRF_BLE_SCAN_DEF(m_scan);                 /**< DB discovery module instance. */
                                          /**< Scanning module instance. */

static uint16_t m_conn_handle;           /**< Current connection handle. */
static bool m_whitelist_disabled;        /**< True if whitelist has been temporarily disabled. */
static bool m_memory_access_in_progress; /**< Flag to keep track of ongoing operations on persistent memory. */

void in_pin_handler(nrf_drv_gpiote_pin_t pin, nrf_gpiote_polarity_t action) {
  c = 1;
}

NRF_BLOCK_DEV_SDC_DEFINE(
    m_block_dev_sdc,
    NRF_BLOCK_DEV_SDC_CONFIG(
        SDC_SECTOR_SIZE,
        APP_SDCARD_CONFIG(SDC_MOSI_PIN, SDC_MISO_PIN, SDC_SCK_PIN, SDC_CS_PIN)),
    NFR_BLOCK_DEV_INFO_CONFIG("Nordic", "SDC", "1.00"));

void timer_led_event_handler(nrf_timer_event_t event_type, void *p_context) {
  switch (event_type) {
  case NRF_TIMER_EVENT_COMPARE0:
  timer_call = 1;
    break;

  default:
    //Do nothing.
    break;
  }
}

static void fatfs_example() {
ret_code_t err_code;
  static FATFS fs;
  static DIR dir;
  static FILINFO fno;
  ble_gatts_hvx_params_t hvx_params;
  DSTATUS disk_state = STA_NOINIT;
  

  // Initialize FATFS disk I/O interface by providing the block device.
  static diskio_blkdev_t drives[] =
      {
          DISKIO_BLOCKDEV_CONFIG(NRF_BLOCKDEV_BASE_ADDR(m_block_dev_sdc, block_dev), NULL)};

  diskio_blockdev_register(drives, ARRAY_SIZE(drives));

  NRF_LOG_INFO("Initializing disk 0 (SDC)...");
  for (uint32_t retries = 3; retries && disk_state; --retries) {
    disk_state = disk_initialize(0);
  }
  if (disk_state) {
    NRF_LOG_INFO("Disk initialization failed.");
    return;
  }

  uint32_t blocks_per_mb = (1024uL * 1024uL) / m_block_dev_sdc.block_dev.p_ops->geometry(&m_block_dev_sdc.block_dev)->blk_size;
  uint32_t capacity = m_block_dev_sdc.block_dev.p_ops->geometry(&m_block_dev_sdc.block_dev)->blk_count / blocks_per_mb;
  NRF_LOG_INFO("Capacity: %d MB", capacity);

  NRF_LOG_INFO("Mounting volume...");
  ff_result = f_mount(&fs, "", 1);
  if (ff_result) {
    NRF_LOG_INFO("Mount failed.");
    return;
  }

  NRF_LOG_INFO("\r\n Listing directory: /");
  ff_result = f_opendir(&dir, "/");
  if (ff_result) {
    NRF_LOG_INFO("Directory listing failed!");
    return;
  }

  do {
    ff_result = f_readdir(&dir, &fno);
    if (ff_result != FR_OK) {
      NRF_LOG_INFO("Directory read failed.");
      return;
    }

    if (fno.fname[0]) {
      if (fno.fattrib & AM_DIR) {
        NRF_LOG_RAW_INFO("   <DIR>   %s", (uint32_t)fno.fname);
      } else {
        NRF_LOG_RAW_INFO("%9lu  %s", fno.fsize, (uint32_t)fno.fname);
      }
    }
  } while (fno.fname[0]);
  NRF_LOG_RAW_INFO("");
  uint8_t string[15];
  NRF_LOG_INFO(string);
  NRF_LOG_INFO("Writing to file " FILE_NAME "...");
  ff_result = f_open(&file, FILE_NAME, FA_READ);
  if (ff_result != FR_OK) {
    NRF_LOG_INFO("Unable to open or create file: " FILE_NAME ".");
    return;
  }
  uint64_t size;
  size = f_size(&file);
   char * data = NULL;
        data = malloc(size); /* allocate memory to store image data */
        NRF_LOG_INFO("data size: %d bytes", data);
        NRF_LOG_INFO("File size: %d bytes", size);
        nrf_delay_ms(1000);
        int b=86;
        int counter=0;
        char string1[150];
    for(int a=1 ;a<2000000;a=a+150)
    {
    counter++;
    
        f_lseek(&file,b);
    ff_result = f_read(&file, string1, 150, (UINT *) &bytes_written);
    if (ff_result != FR_OK)
    {
        NRF_LOG_INFO("read failed\r\n.");
    }
    else
    {
        //NRF_LOG_INFO("%d bytes read.", bytes_written);
    }
    NRF_LOG_HEXDUMP_DEBUG(string1, 0);
                    do
                    {

                    
                        uint16_t length = (uint16_t)150;
                        err_code = ble_nus_data_send(&m_nus, string1, &length, m_conn_handle);
                       
                        
                        
                        if ((err_code != NRF_ERROR_INVALID_STATE) &&
                            (err_code != NRF_ERROR_RESOURCES) &&
                            (err_code != NRF_ERROR_NOT_FOUND))
                        {
                          APP_ERROR_CHECK(err_code);
                        }
                    } while (err_code == NRF_ERROR_RESOURCES);

   
    
    
    b=b+150;
    
    }
    (void) f_close(&file);
    NRF_LOG_INFO("%d",counter);
    NRF_LOG_INFO("done");

  
}
/**< Scan parameters requested for scanning and connection. */
static ble_gap_scan_params_t const m_scan_param =
    {
        .active = 0x01,
#if (NRF_SD_BLE_API_VERSION > 7)
        .interval_us = NRF_BLE_SCAN_SCAN_INTERVAL * UNIT_0_625_MS,
        .window_us = NRF_BLE_SCAN_SCAN_WINDOW * UNIT_0_625_MS,
#else
        .interval = NRF_BLE_SCAN_SCAN_INTERVAL,
        .window = NRF_BLE_SCAN_SCAN_WINDOW,
#endif
        .filter_policy = BLE_GAP_SCAN_FP_ACCEPT_ALL,
        .timeout = SCAN_DURATION_WITELIST,
        .scan_phys =  BLE_GAP_PHY_1MBPS ,
        .extended = true,

};

/**@brief Names which the central applications will scan for, and which will be advertised by the peripherals.
 *  if these are set to empty strings, the UUIDs defined below will be used
 */
static char const m_target_periph_name[] = ""; /**< If you want to connect to a peripheral using a given advertising name, type its name here. */
static bool is_connect_per_addr = true;        /**< If you want to connect to a peripheral with a given address, set this to true and put the correct address in the variable below. */

static ble_gap_addr_t const m_target_periph_addr =
    {
        /* Possible values for addr_type:
       BLE_GAP_ADDR_TYPE_PUBLIC,
       BLE_GAP_ADDR_TYPE_RANDOM_STATIC,
       BLE_GAP_ADDR_TYPE_RANDOM_PRIVATE_RESOLVABLE,
       BLE_GAP_ADDR_TYPE_RANDOM_PRIVATE_NON_RESOLVABLE. */
        .addr_type = BLE_GAP_ADDR_TYPE_RANDOM_STATIC,
        .addr = {0x8D, 0xFE, 0x23, 0x86, 0x77, 0xD9}};

static void scan_start(void);

/**@brief Function for asserts in the SoftDevice.
 *
 * @details This function will be called in case of an assert in the SoftDevice.
 *
 * @warning This handler is an example only and does not fit a final product. You need to analyze
 *          how your product is supposed to react in case of Assert.
 * @warning On assert from the SoftDevice, the system can only recover on reset.
 *
 * @param[in] line_num     Line number of the failing ASSERT call.
 * @param[in] p_file_name  File name of the failing ASSERT call.
 */
void assert_nrf_callback(uint16_t line_num, const uint8_t *p_file_name) {
  app_error_handler(0xDEADBEEF, line_num, p_file_name);
}

/**@brief Function for handling the Heart Rate Service Client and Battery Service Client errors.
 *
 * @param[in]   nrf_error   Error code containing information about what went wrong.
 */
static void service_error_handler(uint32_t nrf_error) {
  APP_ERROR_HANDLER(nrf_error);
}

/**@brief Function for handling database discovery events.
 *
 * @details This function is callback function to handle events from the database discovery module.
 *          Depending on the UUIDs that are discovered, this function should forward the events
 *          to their respective services.
 *
 * @param[in] p_event  Pointer to the database discovery event.
 */
static void db_disc_handler(ble_db_discovery_evt_t *p_evt) {
  ble_hrs_on_db_disc_evt(&m_hrs_c, p_evt);
  ble_bas_on_db_disc_evt(&m_bas_c, p_evt);
}

/**@brief Function for handling Peer Manager events.
 *
 * @param[in] p_evt  Peer Manager event.
 */

static void adv_scan_start(void) {
  ret_code_t err_code;

  //check if there are no flash operations in progress
  if (!nrf_fstorage_is_busy(NULL)) {
    // Start scanning for peripherals and initiate connection to devices which
    // advertise Heart Rate or Running speed and cadence UUIDs.
    //scan_start();
    
    // Turn on the LED to signal scanning.
    bsp_board_led_on(BSP_BOARD_LED_0);

    // Start advertising.
    err_code = ble_advertising_start(&m_advertising, BLE_ADV_MODE_FAST);
    APP_ERROR_CHECK(err_code);
  }
}
static void pm_evt_handler(pm_evt_t const *p_evt) {
  pm_handler_on_pm_evt(p_evt);
  pm_handler_disconnect_on_sec_failure(p_evt);
  pm_handler_flash_clean(p_evt);

  switch (p_evt->evt_id) {
  case PM_EVT_PEERS_DELETE_SUCCEEDED:
    // Bonds are deleted. Start scanning.
    adv_scan_start();
    break;

  default:
    break;
  }
}

/**
 * @brief Function for shutdown events.
 *
 * @param[in]   event       Shutdown type.
 */
static bool shutdown_handler(nrf_pwr_mgmt_evt_t event) {
  ret_code_t err_code;

  err_code = bsp_indication_set(BSP_INDICATE_IDLE);
  APP_ERROR_CHECK(err_code);

  switch (event) {
  case NRF_PWR_MGMT_EVT_PREPARE_WAKEUP:
    // Prepare wakeup buttons.
    err_code = bsp_btn_ble_sleep_mode_prepare();
    APP_ERROR_CHECK(err_code);
    break;
  default:
    break;
  }

  return true;
}

NRF_PWR_MGMT_HANDLER_REGISTER(shutdown_handler, APP_SHUTDOWN_HANDLER_PRIORITY);

/**@brief Function for handling BLE events.
 *
 * @param[in]   p_ble_evt   Bluetooth stack event.
 * @param[in]   p_context   Unused.
 */
static void multi_qwr_conn_handle_assign(uint16_t conn_handle) {
  for (uint32_t i = 0; i < NRF_SDH_BLE_TOTAL_LINK_COUNT; i++) {
    if (m_qwr[i].conn_handle == BLE_CONN_HANDLE_INVALID) {
      ret_code_t err_code = nrf_ble_qwr_conn_handle_assign(&m_qwr[i], conn_handle);
      APP_ERROR_CHECK(err_code);
      break;
    }
  }
}
volatile uint8_t peristat=0;
static void on_ble_peripheral_evt(ble_evt_t const *p_ble_evt) {
  uint32_t err_code;

  switch (p_ble_evt->header.evt_id) {
  case BLE_GAP_EVT_CONNECTED:

    NRF_LOG_INFO("peripheral Connected");
    peristat=1;
    err_code = bsp_indication_set(BSP_INDICATE_CONNECTED);
    APP_ERROR_CHECK(err_code);
    ble_gap_phys_t const phys =
        {
        
            .rx_phys = BLE_GAP_PHY_2MBPS | BLE_GAP_PHY_1MBPS | BLE_GAP_PHY_CODED,
            .tx_phys = BLE_GAP_PHY_2MBPS | BLE_GAP_PHY_1MBPS | BLE_GAP_PHY_CODED,
        };
        
      
   err_code = sd_ble_gap_phy_update(p_ble_evt->evt.gap_evt.conn_handle, &phys);
   APP_ERROR_CHECK(err_code);

    m_conn_handle = p_ble_evt->evt.gap_evt.conn_handle;
    multi_qwr_conn_handle_assign(p_ble_evt->evt.gap_evt.conn_handle);
    APP_ERROR_CHECK(err_code);
    break;

  case BLE_GAP_EVT_DISCONNECTED:
    NRF_LOG_INFO("Disconnected");
    peristat=0;
    // LED indication will be changed when advertising starts.
    m_conn_handle = BLE_CONN_HANDLE_INVALID;
    break;

  case BLE_GAP_EVT_PHY_UPDATE_REQUEST: {
    NRF_LOG_DEBUG("PHY update request.");
    ble_gap_phys_t const phys =
        {
        
            .rx_phys = BLE_GAP_PHY_2MBPS | BLE_GAP_PHY_1MBPS | BLE_GAP_PHY_CODED,
            .tx_phys = BLE_GAP_PHY_2MBPS | BLE_GAP_PHY_1MBPS | BLE_GAP_PHY_CODED, 
        };
        
      
    err_code = sd_ble_gap_phy_update(p_ble_evt->evt.gap_evt.conn_handle, &phys);
    APP_ERROR_CHECK(err_code);
  } break;

  case BLE_GAP_EVT_SEC_PARAMS_REQUEST:
    // Pairing not supported
    err_code = sd_ble_gap_sec_params_reply(m_conn_handle, BLE_GAP_SEC_STATUS_PAIRING_NOT_SUPP, NULL, NULL);
    APP_ERROR_CHECK(err_code);
    break;

  case BLE_GATTS_EVT_SYS_ATTR_MISSING:
    // No system attributes have been stored.
    err_code = sd_ble_gatts_sys_attr_set(m_conn_handle, NULL, 0, 0);
    APP_ERROR_CHECK(err_code);
    break;

  case BLE_GATTC_EVT_TIMEOUT:
    // Disconnect on GATT Client timeout event.
    err_code = sd_ble_gap_disconnect(p_ble_evt->evt.gattc_evt.conn_handle,
    BLE_HCI_REMOTE_USER_TERMINATED_CONNECTION);
    APP_ERROR_CHECK(err_code);
    break;

  case BLE_GATTS_EVT_TIMEOUT:
    // Disconnect on GATT Server timeout event.
    err_code = sd_ble_gap_disconnect(p_ble_evt->evt.gatts_evt.conn_handle,
        BLE_HCI_REMOTE_USER_TERMINATED_CONNECTION);
    APP_ERROR_CHECK(err_code);
    break;

  default:
    // No implementation needed.
    break;
  }
}

static void on_ble_central_evt(ble_evt_t const *p_ble_evt) {
  ret_code_t err_code;
  ble_gap_evt_t const *p_gap_evt = &p_ble_evt->evt.gap_evt;

  switch (p_ble_evt->header.evt_id) {
  // Upon connection, check which peripheral is connected (HR or RSC), initiate DB
  // discovery, update LEDs status, and resume scanning, if necessary.
  case BLE_GAP_EVT_CONNECTED: {
    NRF_LOG_INFO("Central connected");
    // If no Heart Rate sensor or RSC sensor is currently connected, try to find them on this peripheral.
    if ((m_conn_handle_hrs_c == BLE_CONN_HANDLE_INVALID) || (m_conn_handle_rscs_c == BLE_CONN_HANDLE_INVALID)) {
      NRF_LOG_INFO("Attempt to find HRS or RSC on conn_handle 0x%x", p_gap_evt->conn_handle);

      err_code = ble_db_discovery_start(&m_db_disc[0], p_gap_evt->conn_handle);
      if (err_code == NRF_ERROR_BUSY) {
        err_code = ble_db_discovery_start(&m_db_disc[1], p_gap_evt->conn_handle);
        APP_ERROR_CHECK(err_code);
      } else {
        APP_ERROR_CHECK(err_code);
      }
    }

    // Assign connection handle to the QWR module.
    multi_qwr_conn_handle_assign(p_gap_evt->conn_handle);

    // Update LEDs status, and check whether to look for more peripherals to connect to.
    bsp_board_led_on(BSP_BOARD_LED_1);
    if (ble_conn_state_central_conn_count() == NRF_SDH_BLE_CENTRAL_LINK_COUNT) {
      bsp_board_led_off(BSP_BOARD_LED_0);
    } else {
      // Resume scanning.
      bsp_board_led_on(BSP_BOARD_LED_0);
      scan_start();
    }
  } break; // BLE_GAP_EVT_CONNECTED

  // Upon disconnection, reset the connection handle of the peer that disconnected,
  // update the LEDs status and start scanning again.
  case BLE_GAP_EVT_DISCONNECTED: {
    if (p_gap_evt->conn_handle == m_conn_handle_hrs_c) {
      NRF_LOG_INFO("HRS central disconnected (reason: %d)",
          p_gap_evt->params.disconnected.reason);

      m_conn_handle_hrs_c = BLE_CONN_HANDLE_INVALID;

      err_code = nrf_ble_scan_filter_set(&m_scan,
          SCAN_UUID_FILTER,
          &m_adv_uuids[HART_RATE_SERVICE_UUID_IDX]);
      APP_ERROR_CHECK(err_code);
      
    }

    if ((m_conn_handle_rscs_c == BLE_CONN_HANDLE_INVALID) || (m_conn_handle_hrs_c == BLE_CONN_HANDLE_INVALID)) {
      // Start scanning.
      scan_start();

      // Update LEDs status.
      bsp_board_led_on(BSP_BOARD_LED_0);
    }

    if (ble_conn_state_central_conn_count() == 0) {
      bsp_board_led_off(BSP_BOARD_LED_1);
    }
  } break; // BLE_GAP_EVT_DISCONNECTED

  case BLE_GAP_EVT_TIMEOUT: {
    // No timeout for scanning is specified, so only connection attemps can timeout.
    if (p_gap_evt->params.timeout.src == BLE_GAP_TIMEOUT_SRC_CONN) {
      NRF_LOG_INFO("Connection Request timed out.");
    }
  } break;

  case BLE_GAP_EVT_CONN_PARAM_UPDATE_REQUEST: {
    // Accept parameters requested by peer.
    err_code = sd_ble_gap_conn_param_update(p_gap_evt->conn_handle,
        &p_gap_evt->params.conn_param_update_request.conn_params);
    APP_ERROR_CHECK(err_code);
  } break;

  case BLE_GAP_EVT_PHY_UPDATE_REQUEST: {
    NRF_LOG_DEBUG("PHY update request.");
    ble_gap_phys_t const phys =
        {
            .rx_phys = BLE_GAP_PHY_2MBPS | BLE_GAP_PHY_1MBPS | BLE_GAP_PHY_CODED,
            .tx_phys = BLE_GAP_PHY_2MBPS | BLE_GAP_PHY_1MBPS | BLE_GAP_PHY_CODED,
        };
    err_code = sd_ble_gap_phy_update(p_ble_evt->evt.gap_evt.conn_handle, &phys);
    APP_ERROR_CHECK(err_code);
  } break;

  case BLE_GATTC_EVT_TIMEOUT:
    // Disconnect on GATT Client timeout event.
    NRF_LOG_DEBUG("GATT Client Timeout.");
    err_code = sd_ble_gap_disconnect(p_ble_evt->evt.gattc_evt.conn_handle,
        BLE_HCI_REMOTE_USER_TERMINATED_CONNECTION);
    APP_ERROR_CHECK(err_code);
    break;

  case BLE_GATTS_EVT_TIMEOUT:
    // Disconnect on GATT Server timeout event.
    NRF_LOG_DEBUG("GATT Server Timeout.");
    err_code = sd_ble_gap_disconnect(p_ble_evt->evt.gatts_evt.conn_handle,
        BLE_HCI_REMOTE_USER_TERMINATED_CONNECTION);
    APP_ERROR_CHECK(err_code);
    break;

  default:
    // No implementation needed.
    break;
  }
}

/**@brief   Function for handling BLE events from peripheral applications.
 * @details Updates the status LEDs used to report the activity of the peripheral applications.
 *
 * @param[in]   p_ble_evt   Bluetooth stack event.
 */

static bool ble_evt_is_advertising_timeout(ble_evt_t const *p_ble_evt) {
  return (p_ble_evt->header.evt_id == BLE_GAP_EVT_ADV_SET_TERMINATED);
}
static void ble_evt_handler(ble_evt_t const *p_ble_evt, void *p_context) {
  uint16_t conn_handle = p_ble_evt->evt.gap_evt.conn_handle;
  uint16_t role = ble_conn_state_role(conn_handle);

  // Based on the role this device plays in the connection, dispatch to the right handler.
  if (role == BLE_GAP_ROLE_PERIPH || ble_evt_is_advertising_timeout(p_ble_evt)) {
    //ble_hrs_on_ble_evt(p_ble_evt, &m_hrs);
    ble_nus_on_ble_evt(p_ble_evt, &m_nus);
    on_ble_peripheral_evt(p_ble_evt);
  } else if ((role == BLE_GAP_ROLE_CENTRAL) || (p_ble_evt->header.evt_id == BLE_GAP_EVT_ADV_REPORT)) {
    ble_hrs_c_on_ble_evt(p_ble_evt, &m_hrs_c);
    //ble_nus_on_ble_evt(p_ble_evt,&m_nus);
    on_ble_central_evt(p_ble_evt);
  }
}

/**@brief SoftDevice SoC event handler.
 *
 * @param[in]   evt_id      SoC event.
 * @param[in]   p_context   Context.
 */
static void soc_evt_handler(uint32_t evt_id, void *p_context) {
  switch (evt_id) {
  case NRF_EVT_FLASH_OPERATION_SUCCESS:
    /* fall through */
  case NRF_EVT_FLASH_OPERATION_ERROR:

    if (m_memory_access_in_progress) {
      m_memory_access_in_progress = false;
      scan_start();
    }
    break;

  default:
    // No implementation needed.
    break;
  }
}
/**@brief Function for initializing the BLE stack.
 *
 * @details Initializes the SoftDevice and the BLE event interrupt.
 */
static void ble_stack_init(void) {
  ret_code_t err_code;

  err_code = nrf_sdh_enable_request();
  APP_ERROR_CHECK(err_code);

  // Configure the BLE stack using the default settings.
  // Fetch the start address of the application RAM.
  uint32_t ram_start = 0;
  err_code = nrf_sdh_ble_default_cfg_set(APP_BLE_CONN_CFG_TAG, &ram_start);
  APP_ERROR_CHECK(err_code);

  // Enable BLE stack.
  err_code = nrf_sdh_ble_enable(&ram_start);
  NRF_LOG_INFO("%d", err_code);
  APP_ERROR_CHECK(err_code);

  // Register handlers for BLE and SoC events.
  NRF_SDH_BLE_OBSERVER(m_ble_observer, APP_BLE_OBSERVER_PRIO, ble_evt_handler, NULL);
  NRF_SDH_SOC_OBSERVER(m_soc_observer, APP_SOC_OBSERVER_PRIO, soc_evt_handler, NULL);
}

/**@brief Function for the Peer Manager initialization.
 */
static void peer_manager_init(void) {
  ble_gap_sec_params_t sec_param;
  ret_code_t err_code;

  err_code = pm_init();
  APP_ERROR_CHECK(err_code);

  memset(&sec_param, 0, sizeof(ble_gap_sec_params_t));

  // Security parameters to be used for all security procedures.
  sec_param.bond = SEC_PARAM_BOND;
  sec_param.mitm = SEC_PARAM_MITM;
  sec_param.lesc = SEC_PARAM_LESC;
  sec_param.keypress = SEC_PARAM_KEYPRESS;
  sec_param.io_caps = SEC_PARAM_IO_CAPABILITIES;
  sec_param.oob = SEC_PARAM_OOB;
  sec_param.min_key_size = SEC_PARAM_MIN_KEY_SIZE;
  sec_param.max_key_size = SEC_PARAM_MAX_KEY_SIZE;
  sec_param.kdist_own.enc = 1;
  sec_param.kdist_own.id = 1;
  sec_param.kdist_peer.enc = 1;
  sec_param.kdist_peer.id = 1;

  err_code = pm_sec_params_set(&sec_param);
  APP_ERROR_CHECK(err_code);

  err_code = pm_register(pm_evt_handler);
  APP_ERROR_CHECK(err_code);
}

/** @brief Clear bonding information from persistent storage
 */
static void delete_bonds(void) {
  ret_code_t err_code;

  NRF_LOG_INFO("Erase bonds!");

  err_code = pm_peers_delete();
  APP_ERROR_CHECK(err_code);
}

/**@brief Function for disabling the use of whitelist for scanning.
 */
static void whitelist_disable(void) {
  if (!m_whitelist_disabled) {
    NRF_LOG_INFO("Whitelist temporarily disabled.");
    m_whitelist_disabled = true;
    nrf_ble_scan_stop();
    scan_start();
  }
}

/**@brief Function for handling events from the BSP module.
 *
 * @param[in]   event   Event generated by button press.
 */
void bsp_event_handler(bsp_event_t event) {
  ret_code_t err_code;

  switch (event) {
  case BSP_EVENT_SLEEP:
    nrf_pwr_mgmt_shutdown(NRF_PWR_MGMT_SHUTDOWN_GOTO_SYSOFF);
    break;

  case BSP_EVENT_DISCONNECT:
    err_code = sd_ble_gap_disconnect(m_conn_handle, BLE_HCI_REMOTE_USER_TERMINATED_CONNECTION);
    if (err_code != NRF_ERROR_INVALID_STATE) {
      APP_ERROR_CHECK(err_code);
    }
    break;

  case BSP_EVENT_WHITELIST_OFF:
    whitelist_disable();
    break;

  default:
    break;
  }
}

/**@brief Heart Rate Collector Handler.
 */
static void hrs_c_evt_handler(ble_hrs_c_t *p_hrs_c, ble_hrs_c_evt_t *p_hrs_c_evt) {
  NRF_LOG_INFO("hrs_c_evt_handler");
  ret_code_t err_code;

  switch (p_hrs_c_evt->evt_type) {
  case BLE_HRS_C_EVT_DISCOVERY_COMPLETE: {
    NRF_LOG_DEBUG("Heart rate service discovered.");

    err_code = ble_hrs_c_handles_assign(p_hrs_c,
        p_hrs_c_evt->conn_handle,
        &p_hrs_c_evt->params.peer_db);
    APP_ERROR_CHECK(err_code);

    // Initiate bonding.
    err_code = pm_conn_secure(p_hrs_c_evt->conn_handle, false);
    if (err_code != NRF_ERROR_BUSY) {
      APP_ERROR_CHECK(err_code);
    }

    // Heart rate service discovered. Enable notification of Heart Rate Measurement.
    err_code = ble_hrs_c_hrm_notif_enable(p_hrs_c);
    APP_ERROR_CHECK(err_code);
  } break;

  case BLE_HRS_C_EVT_HRM_NOTIFICATION: {
    NRF_LOG_INFO("Heart Rate = %d.", p_hrs_c_evt->params.hrm.hr_value);
    heart_rate = p_hrs_c_evt->params.hrm.hr_value;

    if (p_hrs_c_evt->params.hrm.rr_intervals_cnt != 0) {
      uint32_t rr_avg = 0;
      for (uint32_t i = 0; i < p_hrs_c_evt->params.hrm.rr_intervals_cnt; i++) {
        rr_avg += p_hrs_c_evt->params.hrm.rr_intervals[i];
      }
      rr_avg = rr_avg / p_hrs_c_evt->params.hrm.rr_intervals_cnt;
      NRF_LOG_DEBUG("rr_interval (avg) = %d.", rr_avg);
    }
  } break;

  default:
    break;
  }
}

/**@brief Battery level Collector Handler.
 */
static void bas_c_evt_handler(ble_bas_c_t *p_bas_c, ble_bas_c_evt_t *p_bas_c_evt) {
  NRF_LOG_INFO("bas_c_evt_handler");
  ret_code_t err_code;

  switch (p_bas_c_evt->evt_type) {
  case BLE_BAS_C_EVT_DISCOVERY_COMPLETE: {
    err_code = ble_bas_c_handles_assign(p_bas_c,
        p_bas_c_evt->conn_handle,
        &p_bas_c_evt->params.bas_db);
    APP_ERROR_CHECK(err_code);

    // Battery service discovered. Enable notification of Battery Level.
    NRF_LOG_DEBUG("Battery Service discovered. Reading battery level.");

    err_code = ble_bas_c_bl_read(p_bas_c);
    APP_ERROR_CHECK(err_code);

    NRF_LOG_DEBUG("Enabling Battery Level Notification.");
    err_code = ble_bas_c_bl_notif_enable(p_bas_c);
    APP_ERROR_CHECK(err_code);

  } break;

  case BLE_BAS_C_EVT_BATT_NOTIFICATION:
    NRF_LOG_INFO("Battery Level received %d %%.", p_bas_c_evt->params.battery_level);
    break;

  case BLE_BAS_C_EVT_BATT_READ_RESP:
    NRF_LOG_INFO("Battery Level Read as %d %%.", p_bas_c_evt->params.battery_level);
    break;

  default:
    break;
  }
}

/**
 * @brief Heart rate collector initialization.
 */
static void hrs_c_init(void) {
  NRF_LOG_INFO("HRS_C_INIT");
  ble_hrs_c_init_t hrs_c_init_obj;

  hrs_c_init_obj.evt_handler = hrs_c_evt_handler;
  hrs_c_init_obj.error_handler = service_error_handler;
  hrs_c_init_obj.p_gatt_queue = &m_ble_gatt_queue;

  ret_code_t err_code = ble_hrs_c_init(&m_hrs_c, &hrs_c_init_obj);
  APP_ERROR_CHECK(err_code);
}

/**
 * @brief Battery level collector initialization.
 */
static void bas_c_init(void) {
  NRF_LOG_INFO("BAS_C_INIT");
  ble_bas_c_init_t bas_c_init_obj;

  bas_c_init_obj.evt_handler = bas_c_evt_handler;
  bas_c_init_obj.error_handler = service_error_handler;
  bas_c_init_obj.p_gatt_queue = &m_ble_gatt_queue;

  ret_code_t err_code = ble_bas_c_init(&m_bas_c, &bas_c_init_obj);
  APP_ERROR_CHECK(err_code);
}

/**
 * @brief Database discovery collector initialization.
 */
static void db_discovery_init(void) {
  ble_db_discovery_init_t db_init;

  memset(&db_init, 0, sizeof(db_init));

  db_init.evt_handler = db_disc_handler;
  db_init.p_gatt_queue = &m_ble_gatt_queue;

  ret_code_t err_code = ble_db_discovery_init(&db_init);

  APP_ERROR_CHECK(err_code);
}

/**@brief Retrieve a list of peer manager peer IDs.
 *
 * @param[inout] p_peers   The buffer where to store the list of peer IDs.
 * @param[inout] p_size    In: The size of the @p p_peers buffer.
 *                         Out: The number of peers copied in the buffer.
 */
static void peer_list_get(pm_peer_id_t *p_peers, uint32_t *p_size) {
  pm_peer_id_t peer_id;
  uint32_t peers_to_copy;

  peers_to_copy = (*p_size < BLE_GAP_WHITELIST_ADDR_MAX_COUNT) ? *p_size : BLE_GAP_WHITELIST_ADDR_MAX_COUNT;

  peer_id = pm_next_peer_id_get(PM_PEER_ID_INVALID);
  *p_size = 0;

  while ((peer_id != PM_PEER_ID_INVALID) && (peers_to_copy--)) {
    p_peers[(*p_size)++] = peer_id;
    peer_id = pm_next_peer_id_get(peer_id);
  }
}

/**@brief Function to start scanning.
 */
static void scan_start(void) {
  ret_code_t err_code;

  if (nrf_fstorage_is_busy(NULL)) {
    m_memory_access_in_progress = true;
    return;
  }

  NRF_LOG_INFO("Starting scan.");

  err_code = nrf_ble_scan_start(&m_scan);
  APP_ERROR_CHECK(err_code);

  err_code = bsp_indication_set(BSP_INDICATE_SCANNING);
  NRF_LOG_INFO("%d", err_code);
  APP_ERROR_CHECK(err_code);
}

/**@brief Function for initializing buttons and leds.
 *
 * @param[out] p_erase_bonds  Will be true if the clear bonding button was pressed to wake the application up.
 */
static void buttons_leds_init(bool *p_erase_bonds) {
  ret_code_t err_code;
  bsp_event_t startup_event;

  err_code = bsp_init(BSP_INIT_LEDS | BSP_INIT_BUTTONS, bsp_event_handler);
  APP_ERROR_CHECK(err_code);

  err_code = bsp_btn_ble_init(NULL, &startup_event);
  APP_ERROR_CHECK(err_code);

  *p_erase_bonds = (startup_event == BSP_EVENT_CLEAR_BONDING_DATA);
}

/**@brief Function for initializing the nrf log module.
 */
static void log_init(void) {
  ret_code_t err_code = NRF_LOG_INIT(NULL);
  APP_ERROR_CHECK(err_code);

  NRF_LOG_DEFAULT_BACKENDS_INIT();
}

/**@brief Function for initializing the power management module. */
static void power_management_init(void) {
  ret_code_t err_code;
  err_code = nrf_pwr_mgmt_init();
  APP_ERROR_CHECK(err_code);
}

/**@brief GATT module event handler.
 */
static void gatt_evt_handler(nrf_ble_gatt_t *p_gatt, nrf_ble_gatt_evt_t const *p_evt) {

  if ((m_conn_handle == p_evt->conn_handle) && (p_evt->evt_id == NRF_BLE_GATT_EVT_ATT_MTU_UPDATED)) {
    m_ble_nus_max_data_len = p_evt->params.att_mtu_effective - OPCODE_LENGTH - HANDLE_LENGTH;
    NRF_LOG_INFO("Data len is set to 0x%X(%d)", m_ble_nus_max_data_len, m_ble_nus_max_data_len);
  }
  NRF_LOG_DEBUG("ATT MTU exchange completed. central 0x%x peripheral 0x%x",
      p_gatt->att_mtu_desired_central,
      p_gatt->att_mtu_desired_periph);
  switch (p_evt->evt_id) {
  case NRF_BLE_GATT_EVT_ATT_MTU_UPDATED: {
    NRF_LOG_INFO("GATT ATT MTU on connection 0x%x changed to %d.",
        p_evt->conn_handle,
        p_evt->params.att_mtu_effective);
  } break;

  case NRF_BLE_GATT_EVT_DATA_LENGTH_UPDATED: {
    NRF_LOG_INFO("Data length for connection 0x%x updated to %d.",
        p_evt->conn_handle,
        p_evt->params.data_length);
  } break;

  default:
    break;
  }
}
static void whitelist_load()
{
    ret_code_t   ret;
    pm_peer_id_t peers[8];
    uint32_t     peer_cnt;

    memset(peers, PM_PEER_ID_INVALID, sizeof(peers));
    peer_cnt = (sizeof(peers) / sizeof(pm_peer_id_t));

    // Load all peers from flash and whitelist them.
    peer_list_get(peers, &peer_cnt);

    ret = pm_whitelist_set(peers, peer_cnt);
    APP_ERROR_CHECK(ret);

    // Setup the device identies list.
    // Some SoftDevices do not support this feature.
    ret = pm_device_identities_list_set(peers, peer_cnt);
    if (ret != NRF_ERROR_NOT_SUPPORTED)
    {
        APP_ERROR_CHECK(ret);
    }
}
static void on_whitelist_req(void)
{
    ret_code_t err_code;

    // Whitelist buffers.
    ble_gap_addr_t whitelist_addrs[8];
    ble_gap_irk_t  whitelist_irks[8];

    memset(whitelist_addrs, 0x00, sizeof(whitelist_addrs));
    memset(whitelist_irks,  0x00, sizeof(whitelist_irks));

    uint32_t addr_cnt = (sizeof(whitelist_addrs) / sizeof(ble_gap_addr_t));
    uint32_t irk_cnt  = (sizeof(whitelist_irks)  / sizeof(ble_gap_irk_t));

    // Reload the whitelist and whitelist all peers.
    whitelist_load();

    // Get the whitelist previously set using pm_whitelist_set().
    err_code = pm_whitelist_get(whitelist_addrs, &addr_cnt,
                                whitelist_irks,  &irk_cnt);

    if (((addr_cnt == 0) && (irk_cnt == 0)) ||
        (m_whitelist_disabled))
    {
        // Don't use whitelist.
        err_code = nrf_ble_scan_params_set(&m_scan, NULL);
        APP_ERROR_CHECK(err_code);
    }
}
static void scan_evt_handler(scan_evt_t const *p_scan_evt) {
  ret_code_t err_code;
    switch(p_scan_evt->scan_evt_id)
    {
        case NRF_BLE_SCAN_EVT_WHITELIST_REQUEST:
        {
            on_whitelist_req();
            m_whitelist_disabled = false;
        } break;

        case NRF_BLE_SCAN_EVT_CONNECTING_ERROR:
        {
            err_code = p_scan_evt->params.connecting_err.err_code;
            APP_ERROR_CHECK(err_code);
        } break;

        case NRF_BLE_SCAN_EVT_SCAN_TIMEOUT:
        {
            NRF_LOG_INFO("Scan timed out.");
            scan_start();
        } break;

        case NRF_BLE_SCAN_EVT_FILTER_MATCH:
            break;
        case NRF_BLE_SCAN_EVT_WHITELIST_ADV_REPORT:
            break;

        default:
          break;
    }
}

/**@brief Function for initializing the timer.
 */
static void timer_init(void) {
  ret_code_t err_code = app_timer_init();
  APP_ERROR_CHECK(err_code);
}

/**@brief Function for initializing the GATT module.
 */
static void gatt_init(void) {
  ret_code_t err_code = nrf_ble_gatt_init(&m_gatt, gatt_evt_handler);
  APP_ERROR_CHECK(err_code);

  err_code = nrf_ble_gatt_att_mtu_periph_set(&m_gatt, NRF_SDH_BLE_GATT_MAX_MTU_SIZE);
  APP_ERROR_CHECK(err_code);
  err_code = nrf_ble_gatt_data_length_set(&m_gatt, BLE_CONN_HANDLE_INVALID , NRF_SDH_BLE_GAP_DATA_LENGTH);
  APP_ERROR_CHECK(err_code);

}

/**@brief Function for initialization scanning and setting filters.
 */
static void scan_init(void) {
  ret_code_t err_code;
  nrf_ble_scan_init_t init_scan;

  memset(&init_scan, 0, sizeof(init_scan));

  init_scan.p_scan_param = &m_scan_param;
  init_scan.connect_if_match = true;
  init_scan.conn_cfg_tag = APP_BLE_CONN_CFG_TAG;

  err_code = nrf_ble_scan_init(&m_scan, &init_scan, scan_evt_handler);
  APP_ERROR_CHECK(err_code);

  ble_uuid_t uuid =
      {
          .uuid = TARGET_UUID,
          .type = BLE_UUID_TYPE_BLE,
      };

  err_code = nrf_ble_scan_filter_set(&m_scan,
      SCAN_UUID_FILTER,
      &uuid);
  APP_ERROR_CHECK(err_code);

  if (strlen(m_target_periph_name) != 0) {
    err_code = nrf_ble_scan_filter_set(&m_scan,
        SCAN_NAME_FILTER,
        m_target_periph_name);
    APP_ERROR_CHECK(err_code);
  }

  if (is_connect_per_addr) {
    err_code = nrf_ble_scan_filter_set(&m_scan,
        SCAN_ADDR_FILTER,
        m_target_periph_addr.addr);
    APP_ERROR_CHECK(err_code);
  }

  err_code = nrf_ble_scan_filters_enable(&m_scan,
      NRF_BLE_SCAN_ALL_FILTER,
      false);
  APP_ERROR_CHECK(err_code);
}

/**@brief Function for handling the idle state (main loop).
 *
 * @details Handle any pending log operation(s), then sleep until the next event occurs.
 */
static void idle_state_handle(void) {
  ret_code_t err_code;

  err_code = nrf_ble_lesc_request_handler();
  APP_ERROR_CHECK(err_code);

  NRF_LOG_FLUSH();
  nrf_pwr_mgmt_run();
}

/**@brief Function for starting a scan, or instead trigger it from peer manager (after
 *        deleting bonds).
 *
 * @param[in] p_erase_bonds Pointer to a bool to determine if bonds will be deleted before scanning.
 */
void scanning_start(bool *p_erase_bonds) {
  // Start scanning for peripherals and initiate connection
  // with devices that advertise GATT Service UUID.
  if (*p_erase_bonds == true) {
    // Scan is started by the PM_EVT_PEERS_DELETE_SUCCEEDED event.
    delete_bonds();
  } else {
    scan_start();
  }
}

static void gpio_init(void) {
  ret_code_t err_code;
  NRF_LOG_INFO("INIT gpio");

  nrf_drv_gpiote_out_config_t out_config = GPIOTE_CONFIG_OUT_SIMPLE(false);

  err_code = nrf_drv_gpiote_out_init(PIN_OUT, &out_config);
  APP_ERROR_CHECK(err_code);

  nrf_drv_gpiote_in_event_enable(PIN_IN, true);
}

static void gap_params_init(void) {
  ret_code_t err_code;
  ble_gap_conn_params_t gap_conn_params;
  ble_gap_conn_sec_mode_t sec_mode;

  BLE_GAP_CONN_SEC_MODE_SET_OPEN(&sec_mode);

  err_code = sd_ble_gap_device_name_set(&sec_mode,
      (const uint8_t *)DEVICE_NAME,
      strlen(DEVICE_NAME));
  APP_ERROR_CHECK(err_code);

  memset(&gap_conn_params, 0, sizeof(gap_conn_params));

  gap_conn_params.min_conn_interval = MIN_CONN_INTERVAL;
  gap_conn_params.max_conn_interval = MAX_CONN_INTERVAL;
  gap_conn_params.slave_latency = SLAVE_LATENCY;
  gap_conn_params.conn_sup_timeout = CONN_SUP_TIMEOUT;

  err_code = sd_ble_gap_ppcp_set(&gap_conn_params);
  APP_ERROR_CHECK(err_code);
}
static void on_conn_params_evt(ble_conn_params_evt_t *p_evt) {
  uint32_t err_code;

  if (p_evt->evt_type == BLE_CONN_PARAMS_EVT_FAILED) {
    err_code = sd_ble_gap_disconnect(m_conn_handle, BLE_HCI_CONN_INTERVAL_UNACCEPTABLE);
    APP_ERROR_CHECK(err_code);
  }
}

static void conn_params_error_handler(uint32_t nrf_error) {
  APP_ERROR_HANDLER(nrf_error);
}

static void conn_params_init(void) {
  uint32_t err_code;
  ble_conn_params_init_t cp_init;

  memset(&cp_init, 0, sizeof(cp_init));

  cp_init.p_conn_params = NULL;
  cp_init.first_conn_params_update_delay = FIRST_CONN_PARAMS_UPDATE_DELAY;
  cp_init.next_conn_params_update_delay = NEXT_CONN_PARAMS_UPDATE_DELAY;
  cp_init.max_conn_params_update_count = MAX_CONN_PARAMS_UPDATE_COUNT;
  cp_init.start_on_notify_cccd_handle = BLE_GATT_HANDLE_INVALID;
  cp_init.disconnect_on_fail = false;
  cp_init.evt_handler = on_conn_params_evt;
  cp_init.error_handler = conn_params_error_handler;

  err_code = ble_conn_params_init(&cp_init);
  APP_ERROR_CHECK(err_code);
}

void uart_event_handle(app_uart_evt_t *p_event) {
  static uint8_t data_array[BLE_NUS_MAX_DATA_LEN];
  static uint8_t index = 0;
  uint32_t err_code;

  switch (p_event->evt_type) {
  case APP_UART_DATA_READY:
    NRF_LOG_INFO("uart event handle");
    UNUSED_VARIABLE(app_uart_get(&data_array[index]));
    index++;

    if ((data_array[index - 1] == '\n') ||
        (data_array[index - 1] == '\r') ||
        (index >= m_ble_nus_max_data_len)) {
      if (index > 1) {
        NRF_LOG_INFO("uart send handle");
        NRF_LOG_DEBUG("Ready to send data over BLE NUS");
        NRF_LOG_HEXDUMP_DEBUG(data_array, index);

        do {
          uint16_t length = (uint16_t)index;
          err_code = ble_nus_data_send(&m_nus, data_array, &length, m_conn_handle);
          NRF_LOG_INFO("%d", err_code);

          if ((err_code != NRF_ERROR_INVALID_STATE) &&
              (err_code != NRF_ERROR_RESOURCES) &&
              (err_code != NRF_ERROR_NOT_FOUND)) {
            APP_ERROR_CHECK(err_code);
          }
        } while (err_code == NRF_ERROR_RESOURCES);
      }

      index = 0;
    }
    break;

  case APP_UART_COMMUNICATION_ERROR:
    APP_ERROR_HANDLER(p_event->data.error_communication);
    break;

  case APP_UART_FIFO_ERROR:
    APP_ERROR_HANDLER(p_event->data.error_code);
    break;

  default:
    break;
  }
}
/**@snippet [Handling the data received over UART] */

#define UART_TX_BUF_SIZE 256 /**< UART TX buffer size. */
#define UART_RX_BUF_SIZE 256
/**@brief  Function for initializing the UART module.
 */
/**@snippet [UART Initialization] */
static void uart_init(void) {
  uint32_t err_code;
  app_uart_comm_params_t const comm_params =
  {
    .rx_pin_no = RX_PIN_NUMBER,
    .tx_pin_no = TX_PIN_NUMBER,
    .rts_pin_no = RTS_PIN_NUMBER,
    .cts_pin_no = CTS_PIN_NUMBER,
    .flow_control = APP_UART_FLOW_CONTROL_DISABLED,
    .use_parity = false,
#if defined(UART_PRESENT)
    .baud_rate = NRF_UART_BAUDRATE_115200
#else
    .baud_rate = NRF_UARTE_BAUDRATE_115200
#endif
  };

  APP_UART_FIFO_INIT(&comm_params,
      UART_RX_BUF_SIZE,
      UART_TX_BUF_SIZE,
      uart_event_handle,
      APP_IRQ_PRIORITY_LOWEST,
      err_code);
  APP_ERROR_CHECK(err_code);
}
static void nrf_qwr_error_handler(uint32_t nrf_error) {
  APP_ERROR_HANDLER(nrf_error);
}
static void nus_data_handler(ble_nus_evt_t *p_evt) {

  if (p_evt->type == BLE_NUS_EVT_RX_DATA) {
    uint32_t err_code;
    nrf_delay_ms(10);
    NRF_LOG_DEBUG("Received data from BLE NUS. Writing data on UART.");
    NRF_LOG_INFO("rom BLE NUS. ");
    NRF_LOG_HEXDUMP_DEBUG(p_evt->params.rx_data.p_data, p_evt->params.rx_data.length);

    for (uint32_t i = 0; i < p_evt->params.rx_data.length; i++) {
      NRF_LOG_INFO("1 ");
      do {
        err_code = app_uart_put(p_evt->params.rx_data.p_data[i]);
        if ((err_code != NRF_SUCCESS) && (err_code != NRF_ERROR_BUSY)) {
          NRF_LOG_ERROR("Failed receiving NUS message. Error 0x%x. ", err_code);
          APP_ERROR_CHECK(err_code);
        }
      } while (err_code == NRF_ERROR_BUSY);
    }
    if (p_evt->params.rx_data.p_data[p_evt->params.rx_data.length - 1] == '\r') {
      while (app_uart_put('\n') == NRF_ERROR_BUSY)
        ;
    }
  }
}
static void sleep_mode_enter(void) {
  uint32_t err_code = bsp_indication_set(BSP_INDICATE_IDLE);
  APP_ERROR_CHECK(err_code);

  // Prepare wakeup buttons.
  err_code = bsp_btn_ble_sleep_mode_prepare();
  APP_ERROR_CHECK(err_code);

  // Go to system-off mode (this function will not return; wakeup will cause a reset).
  err_code = sd_power_system_off();
  APP_ERROR_CHECK(err_code);
}
static void services_init(void) {
  uint32_t err_code;
  ble_nus_init_t nus_init;
  nrf_ble_qwr_init_t qwr_init = {0};

  // Initialize Queued Write Module.
  qwr_init.error_handler = nrf_qwr_error_handler;

  for (uint32_t i = 0; i < NRF_SDH_BLE_TOTAL_LINK_COUNT; i++) {
    err_code = nrf_ble_qwr_init(&m_qwr[i], &qwr_init);
    APP_ERROR_CHECK(err_code);
  }

  // Initialize NUS.
  memset(&nus_init, 0, sizeof(nus_init));

  nus_init.data_handler = nus_data_handler;

  err_code = ble_nus_init(&m_nus, &nus_init);
  APP_ERROR_CHECK(err_code);
}
static void on_adv_evt(ble_adv_evt_t ble_adv_evt) {
  uint32_t err_code;

  switch (ble_adv_evt) {
  case BLE_ADV_EVT_FAST:
    err_code = bsp_indication_set(BSP_INDICATE_ADVERTISING);
    APP_ERROR_CHECK(err_code);
    break;
  case BLE_ADV_EVT_IDLE:
    sleep_mode_enter();
    break;
  default:
    break;
  }
}

static void advertising_init(void) {
  uint32_t err_code;
  ble_advertising_init_t init;

  memset(&init, 0, sizeof(init));

  init.advdata.name_type = BLE_ADVDATA_FULL_NAME;
  init.advdata.include_appearance = false;
  init.advdata.flags = BLE_GAP_ADV_FLAGS_LE_ONLY_LIMITED_DISC_MODE;

  init.srdata.uuids_complete.uuid_cnt = sizeof(m_adv_uuids) / sizeof(m_adv_uuids[0]);
  init.srdata.uuids_complete.p_uuids = m_adv_uuids;

  init.config.ble_adv_fast_enabled = true;
  init.config.ble_adv_fast_interval = APP_ADV_INTERVAL;
  init.config.ble_adv_fast_timeout = APP_ADV_DURATION;
  init.evt_handler = on_adv_evt;

  err_code = ble_advertising_init(&m_advertising, &init);
  APP_ERROR_CHECK(err_code);

  ble_advertising_conn_cfg_tag_set(&m_advertising, APP_BLE_CONN_CFG_TAG);
}

static void advertising_start(void) {
  uint32_t err_code = ble_advertising_start(&m_advertising, BLE_ADV_MODE_FAST);
  APP_ERROR_CHECK(err_code);
}

void conn_evt_len_ext_set(void)
{
    ret_code_t err_code;
    ble_opt_t  opt;

    memset(&opt, 0x00, sizeof(opt));
    opt.common_opt.conn_evt_ext.enable = 1;

    err_code = sd_ble_opt_set(BLE_COMMON_OPT_CONN_EVT_EXT, &opt);
    APP_ERROR_CHECK(err_code);
}
int main(void) {

  bool erase_bonds;
  uint32_t time_ms = 1; //Time(in miliseconds) between consecutive compare events.
  uint32_t time_ticks;
  
  uint8_t gyrox=0;
  uint8_t gyroy=1;
  uint8_t gyroz=2;
  uint8_t accelx=3,accely=4,accelz=5;
  uint8_t magx=2,magy=2,magz=2;
  uint16_t counter=0;
  uint8_t lat=6,lon=7,alt=8;
  static uint8_t data_array2[150];
  

  uint32_t err_code = NRF_SUCCESS;
  uart_init();
  log_init();

  timer_init();
  power_management_init();
  buttons_leds_init(&erase_bonds);
  ble_stack_init();
  conn_evt_len_ext_set();
  gatt_init();
  peer_manager_init();
  db_discovery_init();
  hrs_c_init();
  bas_c_init();
  scan_init();
  gap_params_init();
  services_init();
  advertising_init();
  conn_params_init();
  
  
  
  
  
  NRF_LOG_INFO("Heart Rate collector example started.");

  

  int store_data=1;
  int first_row = 1;
  int peristat2;
  if (erase_bonds == true) {
    // Scanning and advertising is done upon PM_EVT_PEERS_DELETE_SUCCEEDED event.
    delete_bonds();
  } else {
    adv_scan_start();
  }
  nrf_delay_ms(9000);
 
  for (;;) {
    
    if(peristat2==1)
    {
    
     if(counter<8000)
        {
        
                   

                    NRF_LOG_INFO("%d",counter);
                    sprintf(data_array2,"{\"g_x\":%d,\"g_y\":%d,\"g_z\":%d,\"a_x\":%d,\"a_y\":%d,\"a_z\":%d,\"m_x\":%d,\"m_y\":%d,\"m_z\":%d,\"lat\":%d,\"lon\":%d,\"alt\":%d,\"hb\":%d}",gyrox,gyroy,gyroz,accelx,accely,accelz,magx,magy,magz,lat,lon,alt,heart_rate);
                    //NRF_LOG_INFO("%d",strlen(data_array2));
                    NRF_LOG_DEBUG("Ready to send data over BLE NUS");
                    NRF_LOG_HEXDUMP_DEBUG(data_array2, 0);
                    do
                    {

                    
                        uint16_t length = (uint16_t)150;
                        err_code = ble_nus_data_send(&m_nus, data_array2, &length, m_conn_handle);
                       
                        
                        
                        
                          
                           APP_ERROR_CHECK(err_code);
                        
                    } while (err_code == NRF_ERROR_RESOURCES);
                    
                      gyrox++;
                      gyroy++;
                      gyroz++;
                      accelx++;
                      accely++;
                      accelz++;
                      magx++;
                      magy++;
                      magz++;
                      counter++;
                      lon++;
                      lat++;
                      alt++;
                      }timer_call=0;
                      
    
    
    }
    else if(store_data==1)
    {
    if(peristat==1)
    {
    fatfs_example();
    store_data=0;
    }
    }



}

  
}

[quote userid="87869" url="~/f/nordic-q-a/80125/want-to-achieve-1-2-mbps-through-ble/335744#335744"]From the code you have shared I would expect to see that the application indicates a disconnection by printing 'Disconnected' - this does not happen.
The logs does not indicate any disconnection, but they do seem to indicate a reset. If you did not do this intentionally you might be encountering an unhandled error which is causing the reset, which we then should look into.[/quote]

It was a different test logs , Application is working fine if I face any issue in the app , I will tell you .

[quote userid="87869" url="~/f/nordic-q-a/80125/want-to-achieve-1-2-mbps-through-ble/335744#335744"]It would be useful to know more about how you have configured your nRF Connect for desktop to function as the peripheral as well. Could you elaborate on this?[/quote]

I am not using nRF connect as peripheral I am just seeing data in nRF connect which is coming from NRF52840 . I am using nrf connect on my mobile phone not on desktop .

Best Regards,

Mohsin khan

RE: want to achieve 1-2 Mbps through BLE.

Karl Ylvisaker — Mon, 25 Oct 2021 12:30:13 GMT

[quote user="Mohsin khan"]So the case is , I am using heart rate sensor polar h10 but now in my new code I have removed the scanning command and it works well for my case but throughput is still 70KBPs , I want to achieve more i am sharing the peripheral logs again and code please have a look . I think its good to go now but still lagging . [/quote]

Could you detail what you mean when you say that you removed the scanning command? Your application will still need to scan in order to find and connect to the peripheral. Is the polar h10 heart rate sensor a peripheral device that you wish to transfer all this data to? In your code you are making a central device, which usually is the GATT client - i.e it usually receives the information from a connected peripheral device (such as a heart rate sensor), while in your application it seems to primarily be sending data to a connected peripheral device.
Could you elaborate on this design choice, as you mentioned earlier as 'mixing peripheral and central' - what is the particular reason for this choice?

Briefly looking through the code you have shared I notice that it is filled with commented out sections and lines of code. This is bad practice since it makes the code a lot harder to read and understand. I recommend that you move sections of code that you would like to save for later to a separate file, so that the main work is not cluttered by these lines.

Furthermore, I also notice the widespread use of magic numbers - I strongly recommend that you go through the code and fix this to instead use #defines and consts for all your static numbers. Removing magic numbers drastically increases readability and maintainability while also ensuring that when a configuration is changed the change is applied to all the relevant places, not just the one you remember then and there.

[quote user="Mohsin khan"]And here is code again . [/quote]

It would be useful to know more about how you have configured your nRF Connect for desktop to function as the peripheral as well. Could you elaborate on this?

[quote user="Mohsin khan"]No i didn't reset it but i think i disconnected the device . [/quote]

From the code you have shared I would expect to see that the application indicates a disconnection by printing 'Disconnected' - this does not happen.
The logs does not indicate any disconnection, but they do seem to indicate a reset. If you did not do this intentionally you might be encountering an unhandled error which is causing the reset, which we then should look into.

Best regards,
Karl

RE: want to achieve 1-2 Mbps through BLE.

Karl Ylvisaker — Mon, 25 Oct 2021 12:00:22 GMT

If you are encountering a separate issue with the nRF Connect application please open another ticket for this so that the debugging might happen in parallel with the throughput issue while keeping the forum tidy.

Best regards,
Karl

RE: want to achieve 1-2 Mbps through BLE.

Mohsin khan — Mon, 25 Oct 2021 10:08:07 GMT

Also one issue is from nrf52840 data sent but it shows on app after a while , What about that issue .

RE: want to achieve 1-2 Mbps through BLE.

Mohsin khan — Mon, 25 Oct 2021 09:45:10 GMT

[quote userid="87869" url="~/f/nordic-q-a/80125/want-to-achieve-1-2-mbps-through-ble/335592#335592"]The last of the two logs seems to be from the central, which is able to connect at first, but then it resumes scanning - are you attempting to connect multiple devices to your central? Could you also elaborate on the section in which the data length is updated multiple times in a row - why is this done?[/quote]

So the case is , I am using heart rate sensor polar h10 but now in my new code I have removed the scanning command and it works well for my case but throughput is still 70KBPs , I want to achieve more i am sharing the peripheral logs again and code please have a look . I think its good to go now but still lagging .

<info> app_timer: RTC: initialized.
<info> app: 0
<info> app: HRS_C_INIT
<info> app: BAS_C_INIT
<info> app: Heart Rate collector example started.
<info> app: peripheral Connected
<info> app: Data length for connection 0x1 updated to 251.
<info> app: Data length for connection 0x1 updated to 27.
<info> app: Data len is set to 0xF4(244)
<info> app: GATT ATT MTU on connection 0x1 changed to 247.
<info> app: Data length for connection 0x1 updated to 251.
<info> app: Initializing disk 0 (SDC)...
<info> app: Capacity: 1902 MB
<info> app: Mounting volume...
<info> app: 
 Listing directory: /
   <DIR>   SYSTEM~1        0  000041C6.TXT   223049  BOOK1C~1.XLS  1051955  GUIDEF~1.PDF  1377436  LATCH-~1.PDF   <DIR>   SALMAN  2906452  HRCOMP.CSV 33563537  ESTTT.CSV 69754908  TESTFILE.CSV 69754908  1.CSV  3145720  HR.CSV<info> app: N_CFG_GATT.
<info> app: Writing to file hr.CSV...
<info> app: data size: 0 bytes
<info> app: File size: 3145720 bytes
<info> app: 13334
<info> app: done
<info> app: Data length for connection 0x1 updated to 251.

And here is code again .

/**
 * Copyright (c) 2014 - 2020, Nordic Semiconductor ASA
 *
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without modification,
 * are permitted provided that the following conditions are met:
 *
 * 1. Redistributions of source code must retain the above copyright notice, this
 *    list of conditions and the following disclaimer.
 *
 * 2. Redistributions in binary form, except as embedded into a Nordic
 *    Semiconductor ASA integrated circuit in a product or a software update for
 *    such product, must reproduce the above copyright notice, this list of
 *    conditions and the following disclaimer in the documentation and/or other
 *    materials provided with the distribution.
 *
 * 3. Neither the name of Nordic Semiconductor ASA nor the names of its
 *    contributors may be used to endorse or promote products derived from this
 *    software without specific prior written permission.
 *
 * 4. This software, with or without modification, must only be used with a
 *    Nordic Semiconductor ASA integrated circuit.
 *
 * 5. Any software provided in binary form under this license must not be reverse
 *    engineered, decompiled, modified and/or disassembled.
 *
 * THIS SOFTWARE IS PROVIDED BY NORDIC SEMICONDUCTOR ASA "AS IS" AND ANY EXPRESS
 * OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
 * OF MERCHANTABILITY, NONINFRINGEMENT, AND FITNESS FOR A PARTICULAR PURPOSE ARE
 * DISCLAIMED. IN NO EVENT SHALL NORDIC SEMICONDUCTOR ASA OR CONTRIBUTORS BE
 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE
 * GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
 * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 *
 */
/**
 * @brief BLE Heart Rate Collector application main file.
 *
 * This file contains the source code for a sample heart rate collector.
 */

#include <stdbool.h>
#include <stdint.h>
#include <stdio.h>
#include <string.h>

#include "bsp.h"
#include "diskio_blkdev.h"
#include "ff.h"
#include "nrf.h"
#include "nrf_block_dev_sdc.h"
#include "nrf_delay.h"
#include "nrf_drv_gpiote.h"
#include "nrf_drv_timer.h"

#include "app_uart.h"
#include "ble_advdata.h"
#include "ble_advertising.h"
#include "ble_conn_params.h"
#include "ble_nus.h"
#include "nrf_ble_qwr.h"
#include "ble_gatts.h"

#include "app_error.h"
#include "app_timer.h"
#include "app_util.h"
#include "ble.h"
#include "ble_bas_c.h"
#include "ble_conn_state.h"
#include "ble_db_discovery.h"
#include "ble_hci.h"
#include "ble_hrs_c.h"
#include "ble_srv_common.h"
#include "bsp_btn_ble.h"
#include "fds.h"
#include "nordic_common.h"
#include "nrf_ble_gatt.h"
#include "nrf_ble_lesc.h"
#include "nrf_ble_scan.h"
#include "nrf_fstorage.h"
#include "nrf_log.h"
#include "nrf_log_ctrl.h"
#include "nrf_log_default_backends.h"
#include "nrf_pwr_mgmt.h"
#include "nrf_sdh.h"
#include "nrf_sdh_ble.h"
#include "nrf_sdh_soc.h"
#include "nrf_sdm.h"
#include "peer_manager.h"
#include "peer_manager_handler.h"

#if defined(UART_PRESENT)
#include "nrf_uart.h"
#endif
#if defined(UARTE_PRESENT)
#include "nrf_uarte.h"
#endif

#define FILE_NAME "hr.CSV"
#define TEST_STRING "SD card example."

#define NUS_SERVICE_UUID_TYPE BLE_UUID_TYPE_VENDOR_BEGIN

#ifdef BSP_BUTTON_0
#define PIN_IN BSP_BUTTON_0
#endif
#ifndef PIN_IN
#error "Please indicate input pin"
#endif

#ifdef BSP_LED_1
#define PIN_OUT BSP_LED_1
#endif
#ifndef PIN_OUT
#error "Please indicate output pin"
#endif /**< Context for the Queued Write module.*/

BLE_ADVERTISING_DEF(m_advertising);
BLE_NUS_DEF(m_nus, 6);
NRF_BLE_QWRS_DEF(m_qwr, 6);
static ble_uuid_t m_adv_uuids[] = /**< Universally unique service identifier. */
    {
        {BLE_UUID_NUS_SERVICE, NUS_SERVICE_UUID_TYPE}};

#define APP_ADV_INTERVAL 64 /**< The advertising interval (in units of 0.625 ms. This value corresponds to 40 ms). */

#define APP_ADV_DURATION 18000

volatile uint8_t button_pressed = 0;

volatile int timer_call = 0;
FRESULT ff_result;
static FIL file;

uint16_t heart_rate;
char s_heartrate[4];
volatile uint8_t c;
uint32_t bytes_written;
const nrf_drv_timer_t TIMER_LED = NRF_DRV_TIMER_INSTANCE(1);
#define SDC_SCK_PIN ARDUINO_13_PIN  ///< SDC serial clock (SCK) pin.
#define SDC_MOSI_PIN ARDUINO_11_PIN ///< SDC serial data in (DI) pin.
#define SDC_MISO_PIN ARDUINO_12_PIN ///< SDC serial data out (DO) pin.
#define SDC_CS_PIN ARDUINO_10_PIN   ///< SDC chip select (CS) pin.

#define MIN_CONN_INTERVAL                    (uint16_t)(MSEC_TO_UNITS(20, UNIT_1_25_MS)) 
#define MAX_CONN_INTERVAL                    (uint16_t)(MSEC_TO_UNITS(40, UNIT_1_25_MS))    /**< Maximum acceptable connection interval (75 ms), Connection interval uses 1.25 ms units. */
#define SLAVE_LATENCY 0                                      /**< Slave latency. */
#define CONN_SUP_TIMEOUT MSEC_TO_UNITS(4000, UNIT_10_MS)     /**< Connection supervisory timeout (4 seconds), Supervision Timeout uses 10 ms units. */
#define FIRST_CONN_PARAMS_UPDATE_DELAY APP_TIMER_TICKS(5000) /**< Time from initiating event (connect or start of notification) to first time sd_ble_gap_conn_param_update is called (5 seconds). */
#define NEXT_CONN_PARAMS_UPDATE_DELAY APP_TIMER_TICKS(30000) /**< Time between each call to sd_ble_gap_conn_param_update after the first call (30 seconds). */
#define MAX_CONN_PARAMS_UPDATE_COUNT 3

#define DEVICE_NAME "nRF Relay"
static uint16_t m_ble_nus_max_data_len = BLE_GATT_ATT_MTU_DEFAULT - 3;
#define APP_BLE_CONN_CFG_TAG 1 /**< A tag identifying the SoftDevice BLE configuration. */

#define APP_BLE_OBSERVER_PRIO 3 /**< Application's BLE observer priority. You shouldn't need to modify this value. */
#define APP_SOC_OBSERVER_PRIO 1 /**< Applications' SoC observer priority. You shouldn't need to modify this value. */

#define LESC_DEBUG_MODE 0 /**< Set to 1 to use LESC debug keys, allows you to use a sniffer to inspect traffic. */

#define SEC_PARAM_BOND 1                               /**< Perform bonding. */
#define SEC_PARAM_MITM 0                               /**< Man In The Middle protection not required. */
#define SEC_PARAM_LESC 1                               /**< LE Secure Connections enabled. */
#define SEC_PARAM_KEYPRESS 0                           /**< Keypress notifications not enabled. */
#define SEC_PARAM_IO_CAPABILITIES BLE_GAP_IO_CAPS_NONE /**< No I/O capabilities. */
#define SEC_PARAM_OOB 0                                /**< Out Of Band data not available. */
#define SEC_PARAM_MIN_KEY_SIZE 7                       /**< Minimum encryption key size in octets. */
#define SEC_PARAM_MAX_KEY_SIZE 16                      /**< Maximum encryption key size in octets. */

#define SCAN_DURATION_WITELIST 3000 /**< Duration of the scanning in units of 10 milliseconds. */
#define HART_RATE_SERVICE_UUID_IDX 0
#define TARGET_UUID BLE_UUID_HEART_RATE_SERVICE                /**< Target device uuid that application is looking for. */
static uint16_t m_conn_handle_hrs_c = BLE_CONN_HANDLE_INVALID; /**< Connection handle for the HRS central application */
static uint16_t m_conn_handle_rscs_c = BLE_CONN_HANDLE_INVALID;
char init[] = "Long,Lat,Alt,Accelx,Accely,Accelz,GYROx,GYROy,GYROz,Magx,Magy,Magz,Heartrate,Bat %  ";
char data[] = "2221";

/**@brief Macro to unpack 16bit unsigned UUID from octet stream. */
#define UUID16_EXTRACT(DST, SRC) \
  do {                           \
    (*(DST)) = (SRC)[1];         \
    (*(DST)) <<= 8;              \
    (*(DST)) |= (SRC)[0];        \
  } while (0)

NRF_BLE_GQ_DEF(m_ble_gatt_queue, /**< BLE GATT Queue instance. */
    NRF_SDH_BLE_CENTRAL_LINK_COUNT,
    NRF_BLE_GQ_QUEUE_SIZE);

BLE_HRS_C_DEF(m_hrs_c);                   /**< Structure used to identify the heart rate client module. */
BLE_BAS_C_DEF(m_bas_c);                   /**< Structure used to identify the Battery Service client module. */
NRF_BLE_GATT_DEF(m_gatt);                 /**< GATT module instance. */
BLE_DB_DISCOVERY_ARRAY_DEF(m_db_disc, 2); /**< Database discovery module instances. */
NRF_BLE_SCAN_DEF(m_scan);                 /**< DB discovery module instance. */
                                          /**< Scanning module instance. */

static uint16_t m_conn_handle;           /**< Current connection handle. */
static bool m_whitelist_disabled;        /**< True if whitelist has been temporarily disabled. */
static bool m_memory_access_in_progress; /**< Flag to keep track of ongoing operations on persistent memory. */

void in_pin_handler(nrf_drv_gpiote_pin_t pin, nrf_gpiote_polarity_t action) {
  c = 1;
}

NRF_BLOCK_DEV_SDC_DEFINE(
    m_block_dev_sdc,
    NRF_BLOCK_DEV_SDC_CONFIG(
        SDC_SECTOR_SIZE,
        APP_SDCARD_CONFIG(SDC_MOSI_PIN, SDC_MISO_PIN, SDC_SCK_PIN, SDC_CS_PIN)),
    NFR_BLOCK_DEV_INFO_CONFIG("Nordic", "SDC", "1.00"));

void timer_led_event_handler(nrf_timer_event_t event_type, void *p_context) {
  switch (event_type) {
  case NRF_TIMER_EVENT_COMPARE0:
  timer_call = 1;
    break;

  default:
    //Do nothing.
    break;
  }
}

static void fatfs_example() {
ret_code_t err_code;
  static FATFS fs;
  static DIR dir;
  static FILINFO fno;
  ble_gatts_hvx_params_t hvx_params;
  DSTATUS disk_state = STA_NOINIT;
  

  // Initialize FATFS disk I/O interface by providing the block device.
  static diskio_blkdev_t drives[] =
      {
          DISKIO_BLOCKDEV_CONFIG(NRF_BLOCKDEV_BASE_ADDR(m_block_dev_sdc, block_dev), NULL)};

  diskio_blockdev_register(drives, ARRAY_SIZE(drives));

  NRF_LOG_INFO("Initializing disk 0 (SDC)...");
  for (uint32_t retries = 3; retries && disk_state; --retries) {
    disk_state = disk_initialize(0);
  }
  if (disk_state) {
    NRF_LOG_INFO("Disk initialization failed.");
    return;
  }

  uint32_t blocks_per_mb = (1024uL * 1024uL) / m_block_dev_sdc.block_dev.p_ops->geometry(&m_block_dev_sdc.block_dev)->blk_size;
  uint32_t capacity = m_block_dev_sdc.block_dev.p_ops->geometry(&m_block_dev_sdc.block_dev)->blk_count / blocks_per_mb;
  NRF_LOG_INFO("Capacity: %d MB", capacity);

  NRF_LOG_INFO("Mounting volume...");
  ff_result = f_mount(&fs, "", 1);
  if (ff_result) {
    NRF_LOG_INFO("Mount failed.");
    return;
  }

  NRF_LOG_INFO("\r\n Listing directory: /");
  ff_result = f_opendir(&dir, "/");
  if (ff_result) {
    NRF_LOG_INFO("Directory listing failed!");
    return;
  }

  do {
    ff_result = f_readdir(&dir, &fno);
    if (ff_result != FR_OK) {
      NRF_LOG_INFO("Directory read failed.");
      return;
    }

    if (fno.fname[0]) {
      if (fno.fattrib & AM_DIR) {
        NRF_LOG_RAW_INFO("   <DIR>   %s", (uint32_t)fno.fname);
      } else {
        NRF_LOG_RAW_INFO("%9lu  %s", fno.fsize, (uint32_t)fno.fname);
      }
    }
  } while (fno.fname[0]);
  NRF_LOG_RAW_INFO("");
  uint8_t string[15];
  NRF_LOG_INFO(string);
  NRF_LOG_INFO("Writing to file " FILE_NAME "...");
  ff_result = f_open(&file, FILE_NAME, FA_READ);
  if (ff_result != FR_OK) {
    NRF_LOG_INFO("Unable to open or create file: " FILE_NAME ".");
    return;
  }
  uint64_t size;
  size = f_size(&file);
   char * data = NULL;
        data = malloc(size); /* allocate memory to store image data */
        NRF_LOG_INFO("data size: %d bytes", data);
        NRF_LOG_INFO("File size: %d bytes", size);
        nrf_delay_ms(1000);
        int b=86;
        int counter=0;
        char string1[150];
    for(int a=1 ;a<2000000;a=a+150)
    {
    counter++;
    //NRF_LOG_INFO("%d \n",a);
    //NRF_LOG_INFO("%d \n",b);
        f_lseek(&file,b);
    ff_result = f_read(&file, string1, 150, (UINT *) &bytes_written);
    if (ff_result != FR_OK)
    {
        NRF_LOG_INFO("read failed\r\n.");
    }
    else
    {
        //NRF_LOG_INFO("%d bytes read.", bytes_written);
    }
    NRF_LOG_HEXDUMP_DEBUG(string1, 0);
                    do
                    {

                    
                        uint16_t length = (uint16_t)150;
                        err_code = ble_nus_data_send(&m_nus, string1, &length, m_conn_handle);
                       
                        
                        
                        if ((err_code != NRF_ERROR_INVALID_STATE) &&
                            (err_code != NRF_ERROR_RESOURCES) &&
                            (err_code != NRF_ERROR_NOT_FOUND))
                        {
                          APP_ERROR_CHECK(err_code);
                        }
                    } while (err_code == NRF_ERROR_RESOURCES);

   
    
    //NRF_LOG_INFO("NOT - Len: %i, err_code: %i", length, err_code);
    

    //for(int i=0;i<bytes_written;i++)
    //{
    //NRF_LOG_INFO("%d  ->  %c",i,string1[i]);
    //}
    b=b+150;
    
    }
    (void) f_close(&file);
    NRF_LOG_INFO("%d",counter);
    NRF_LOG_INFO("done");

  //ff_result = f_write(&file, string, sizeof(string), (UINT *) &bytes_written);
  //if (ff_result != FR_OK)
  //{
  //    NRF_LOG_INFO("Write failed\r\n.");
  //}
  //else
  //{
  //    NRF_LOG_INFO("%d bytes written.", bytes_written);
  //}

  //ff_result = f_write(&file, "\n",1,&bytes_written);
  //(void) f_close(&file);
  //for(int a=1 ; a<=600 ; a++)
  //{
  //for (int b=1 ;b<=14;b++)
  //{
  //ff_result = f_write(&file, data, sizeof(data), (UINT *) &bytes_written);
  //if (ff_result != FR_OK)
  //{
  //    NRF_LOG_INFO("Write failed\r\n.");
  //}
  //else
  //{
  //    NRF_LOG_INFO("%d bytes written.", bytes_written);
  //}
  //ff_result = f_write(&file, ",",1,&bytes_written);
  //}
  //ff_result = f_write(&file, "\n",1,&bytes_written);
  //nrf_delay_ms(60);
  //}
}
/**< Scan parameters requested for scanning and connection. */
static ble_gap_scan_params_t const m_scan_param =
    {
        .active = 0x01,
#if (NRF_SD_BLE_API_VERSION > 7)
        .interval_us = NRF_BLE_SCAN_SCAN_INTERVAL * UNIT_0_625_MS,
        .window_us = NRF_BLE_SCAN_SCAN_WINDOW * UNIT_0_625_MS,
#else
        .interval = NRF_BLE_SCAN_SCAN_INTERVAL,
        .window = NRF_BLE_SCAN_SCAN_WINDOW,
#endif
        .filter_policy = BLE_GAP_SCAN_FP_ACCEPT_ALL,
        .timeout = SCAN_DURATION_WITELIST,
        .scan_phys =  BLE_GAP_PHY_1MBPS ,
        .extended = true,

};

/**@brief Names which the central applications will scan for, and which will be advertised by the peripherals.
 *  if these are set to empty strings, the UUIDs defined below will be used
 */
static char const m_target_periph_name[] = ""; /**< If you want to connect to a peripheral using a given advertising name, type its name here. */
static bool is_connect_per_addr = true;        /**< If you want to connect to a peripheral with a given address, set this to true and put the correct address in the variable below. */

static ble_gap_addr_t const m_target_periph_addr =
    {
        /* Possible values for addr_type:
       BLE_GAP_ADDR_TYPE_PUBLIC,
       BLE_GAP_ADDR_TYPE_RANDOM_STATIC,
       BLE_GAP_ADDR_TYPE_RANDOM_PRIVATE_RESOLVABLE,
       BLE_GAP_ADDR_TYPE_RANDOM_PRIVATE_NON_RESOLVABLE. */
        .addr_type = BLE_GAP_ADDR_TYPE_RANDOM_STATIC,
        .addr = {0x8D, 0xFE, 0x23, 0x86, 0x77, 0xD9}};

static void scan_start(void);

/**@brief Function for asserts in the SoftDevice.
 *
 * @details This function will be called in case of an assert in the SoftDevice.
 *
 * @warning This handler is an example only and does not fit a final product. You need to analyze
 *          how your product is supposed to react in case of Assert.
 * @warning On assert from the SoftDevice, the system can only recover on reset.
 *
 * @param[in] line_num     Line number of the failing ASSERT call.
 * @param[in] p_file_name  File name of the failing ASSERT call.
 */
void assert_nrf_callback(uint16_t line_num, const uint8_t *p_file_name) {
  app_error_handler(0xDEADBEEF, line_num, p_file_name);
}

/**@brief Function for handling the Heart Rate Service Client and Battery Service Client errors.
 *
 * @param[in]   nrf_error   Error code containing information about what went wrong.
 */
static void service_error_handler(uint32_t nrf_error) {
  APP_ERROR_HANDLER(nrf_error);
}

/**@brief Function for handling database discovery events.
 *
 * @details This function is callback function to handle events from the database discovery module.
 *          Depending on the UUIDs that are discovered, this function should forward the events
 *          to their respective services.
 *
 * @param[in] p_event  Pointer to the database discovery event.
 */
static void db_disc_handler(ble_db_discovery_evt_t *p_evt) {
  ble_hrs_on_db_disc_evt(&m_hrs_c, p_evt);
  ble_bas_on_db_disc_evt(&m_bas_c, p_evt);
}

/**@brief Function for handling Peer Manager events.
 *
 * @param[in] p_evt  Peer Manager event.
 */

static void adv_scan_start(void) {
  ret_code_t err_code;

  //check if there are no flash operations in progress
  if (!nrf_fstorage_is_busy(NULL)) {
    // Start scanning for peripherals and initiate connection to devices which
    // advertise Heart Rate or Running speed and cadence UUIDs.
    //scan_start();
    
    // Turn on the LED to signal scanning.
    bsp_board_led_on(BSP_BOARD_LED_0);

    // Start advertising.
    err_code = ble_advertising_start(&m_advertising, BLE_ADV_MODE_FAST);
    APP_ERROR_CHECK(err_code);
  }
}
static void pm_evt_handler(pm_evt_t const *p_evt) {
  pm_handler_on_pm_evt(p_evt);
  pm_handler_disconnect_on_sec_failure(p_evt);
  pm_handler_flash_clean(p_evt);

  switch (p_evt->evt_id) {
  case PM_EVT_PEERS_DELETE_SUCCEEDED:
    // Bonds are deleted. Start scanning.
    adv_scan_start();
    break;

  default:
    break;
  }
}

/**
 * @brief Function for shutdown events.
 *
 * @param[in]   event       Shutdown type.
 */
static bool shutdown_handler(nrf_pwr_mgmt_evt_t event) {
  ret_code_t err_code;

  err_code = bsp_indication_set(BSP_INDICATE_IDLE);
  APP_ERROR_CHECK(err_code);

  switch (event) {
  case NRF_PWR_MGMT_EVT_PREPARE_WAKEUP:
    // Prepare wakeup buttons.
    err_code = bsp_btn_ble_sleep_mode_prepare();
    APP_ERROR_CHECK(err_code);
    break;
  default:
    break;
  }

  return true;
}

NRF_PWR_MGMT_HANDLER_REGISTER(shutdown_handler, APP_SHUTDOWN_HANDLER_PRIORITY);

/**@brief Function for handling BLE events.
 *
 * @param[in]   p_ble_evt   Bluetooth stack event.
 * @param[in]   p_context   Unused.
 */
static void multi_qwr_conn_handle_assign(uint16_t conn_handle) {
  for (uint32_t i = 0; i < NRF_SDH_BLE_TOTAL_LINK_COUNT; i++) {
    if (m_qwr[i].conn_handle == BLE_CONN_HANDLE_INVALID) {
      ret_code_t err_code = nrf_ble_qwr_conn_handle_assign(&m_qwr[i], conn_handle);
      APP_ERROR_CHECK(err_code);
      break;
    }
  }
}
volatile uint8_t peristat=0;
static void on_ble_peripheral_evt(ble_evt_t const *p_ble_evt) {
  uint32_t err_code;

  switch (p_ble_evt->header.evt_id) {
  case BLE_GAP_EVT_CONNECTED:

    NRF_LOG_INFO("peripheral Connected");
    peristat=1;
    err_code = bsp_indication_set(BSP_INDICATE_CONNECTED);
    APP_ERROR_CHECK(err_code);
    ble_gap_phys_t const phys =
        {
        
            .rx_phys = BLE_GAP_PHY_2MBPS | BLE_GAP_PHY_1MBPS | BLE_GAP_PHY_CODED,
            .tx_phys = BLE_GAP_PHY_2MBPS | BLE_GAP_PHY_1MBPS | BLE_GAP_PHY_CODED,
        };
        
      
   err_code = sd_ble_gap_phy_update(p_ble_evt->evt.gap_evt.conn_handle, &phys);
   APP_ERROR_CHECK(err_code);

    m_conn_handle = p_ble_evt->evt.gap_evt.conn_handle;
    multi_qwr_conn_handle_assign(p_ble_evt->evt.gap_evt.conn_handle);
    APP_ERROR_CHECK(err_code);
    break;

  case BLE_GAP_EVT_DISCONNECTED:
    NRF_LOG_INFO("Disconnected");
    peristat=0;
    // LED indication will be changed when advertising starts.
    m_conn_handle = BLE_CONN_HANDLE_INVALID;
    break;

  case BLE_GAP_EVT_PHY_UPDATE_REQUEST: {
    NRF_LOG_DEBUG("PHY update request.");
    ble_gap_phys_t const phys =
        {
        
            .rx_phys = BLE_GAP_PHY_2MBPS | BLE_GAP_PHY_1MBPS | BLE_GAP_PHY_CODED,
            .tx_phys = BLE_GAP_PHY_2MBPS | BLE_GAP_PHY_1MBPS | BLE_GAP_PHY_CODED, 
        };
        
      
    err_code = sd_ble_gap_phy_update(p_ble_evt->evt.gap_evt.conn_handle, &phys);
    APP_ERROR_CHECK(err_code);
  } break;

  case BLE_GAP_EVT_SEC_PARAMS_REQUEST:
    // Pairing not supported
    err_code = sd_ble_gap_sec_params_reply(m_conn_handle, BLE_GAP_SEC_STATUS_PAIRING_NOT_SUPP, NULL, NULL);
    APP_ERROR_CHECK(err_code);
    break;

  case BLE_GATTS_EVT_SYS_ATTR_MISSING:
    // No system attributes have been stored.
    err_code = sd_ble_gatts_sys_attr_set(m_conn_handle, NULL, 0, 0);
    APP_ERROR_CHECK(err_code);
    break;

  case BLE_GATTC_EVT_TIMEOUT:
    // Disconnect on GATT Client timeout event.
    err_code = sd_ble_gap_disconnect(p_ble_evt->evt.gattc_evt.conn_handle,
    BLE_HCI_REMOTE_USER_TERMINATED_CONNECTION);
    APP_ERROR_CHECK(err_code);
    break;

  case BLE_GATTS_EVT_TIMEOUT:
    // Disconnect on GATT Server timeout event.
    err_code = sd_ble_gap_disconnect(p_ble_evt->evt.gatts_evt.conn_handle,
        BLE_HCI_REMOTE_USER_TERMINATED_CONNECTION);
    APP_ERROR_CHECK(err_code);
    break;

  default:
    // No implementation needed.
    break;
  }
}

static void on_ble_central_evt(ble_evt_t const *p_ble_evt) {
  ret_code_t err_code;
  ble_gap_evt_t const *p_gap_evt = &p_ble_evt->evt.gap_evt;

  switch (p_ble_evt->header.evt_id) {
  // Upon connection, check which peripheral is connected (HR or RSC), initiate DB
  // discovery, update LEDs status, and resume scanning, if necessary.
  case BLE_GAP_EVT_CONNECTED: {
    NRF_LOG_INFO("Central connected");
    // If no Heart Rate sensor or RSC sensor is currently connected, try to find them on this peripheral.
    if ((m_conn_handle_hrs_c == BLE_CONN_HANDLE_INVALID) || (m_conn_handle_rscs_c == BLE_CONN_HANDLE_INVALID)) {
      NRF_LOG_INFO("Attempt to find HRS or RSC on conn_handle 0x%x", p_gap_evt->conn_handle);

      err_code = ble_db_discovery_start(&m_db_disc[0], p_gap_evt->conn_handle);
      if (err_code == NRF_ERROR_BUSY) {
        err_code = ble_db_discovery_start(&m_db_disc[1], p_gap_evt->conn_handle);
        APP_ERROR_CHECK(err_code);
      } else {
        APP_ERROR_CHECK(err_code);
      }
    }

    // Assign connection handle to the QWR module.
    multi_qwr_conn_handle_assign(p_gap_evt->conn_handle);

    // Update LEDs status, and check whether to look for more peripherals to connect to.
    bsp_board_led_on(BSP_BOARD_LED_1);
    if (ble_conn_state_central_conn_count() == NRF_SDH_BLE_CENTRAL_LINK_COUNT) {
      bsp_board_led_off(BSP_BOARD_LED_0);
    } else {
      // Resume scanning.
      bsp_board_led_on(BSP_BOARD_LED_0);
      scan_start();
    }
  } break; // BLE_GAP_EVT_CONNECTED

  // Upon disconnection, reset the connection handle of the peer that disconnected,
  // update the LEDs status and start scanning again.
  case BLE_GAP_EVT_DISCONNECTED: {
    if (p_gap_evt->conn_handle == m_conn_handle_hrs_c) {
      NRF_LOG_INFO("HRS central disconnected (reason: %d)",
          p_gap_evt->params.disconnected.reason);

      m_conn_handle_hrs_c = BLE_CONN_HANDLE_INVALID;

      err_code = nrf_ble_scan_filter_set(&m_scan,
          SCAN_UUID_FILTER,
          &m_adv_uuids[HART_RATE_SERVICE_UUID_IDX]);
      APP_ERROR_CHECK(err_code);
      
    }

    if ((m_conn_handle_rscs_c == BLE_CONN_HANDLE_INVALID) || (m_conn_handle_hrs_c == BLE_CONN_HANDLE_INVALID)) {
      // Start scanning.
      scan_start();

      // Update LEDs status.
      bsp_board_led_on(BSP_BOARD_LED_0);
    }

    if (ble_conn_state_central_conn_count() == 0) {
      bsp_board_led_off(BSP_BOARD_LED_1);
    }
  } break; // BLE_GAP_EVT_DISCONNECTED

  case BLE_GAP_EVT_TIMEOUT: {
    // No timeout for scanning is specified, so only connection attemps can timeout.
    if (p_gap_evt->params.timeout.src == BLE_GAP_TIMEOUT_SRC_CONN) {
      NRF_LOG_INFO("Connection Request timed out.");
    }
  } break;

  case BLE_GAP_EVT_CONN_PARAM_UPDATE_REQUEST: {
    // Accept parameters requested by peer.
    err_code = sd_ble_gap_conn_param_update(p_gap_evt->conn_handle,
        &p_gap_evt->params.conn_param_update_request.conn_params);
    APP_ERROR_CHECK(err_code);
  } break;

  case BLE_GAP_EVT_PHY_UPDATE_REQUEST: {
    NRF_LOG_DEBUG("PHY update request.");
    ble_gap_phys_t const phys =
        {
            .rx_phys = BLE_GAP_PHY_2MBPS | BLE_GAP_PHY_1MBPS | BLE_GAP_PHY_CODED,
            .tx_phys = BLE_GAP_PHY_2MBPS | BLE_GAP_PHY_1MBPS | BLE_GAP_PHY_CODED,
        };
    err_code = sd_ble_gap_phy_update(p_ble_evt->evt.gap_evt.conn_handle, &phys);
    APP_ERROR_CHECK(err_code);
  } break;

  case BLE_GATTC_EVT_TIMEOUT:
    // Disconnect on GATT Client timeout event.
    NRF_LOG_DEBUG("GATT Client Timeout.");
    err_code = sd_ble_gap_disconnect(p_ble_evt->evt.gattc_evt.conn_handle,
        BLE_HCI_REMOTE_USER_TERMINATED_CONNECTION);
    APP_ERROR_CHECK(err_code);
    break;

  case BLE_GATTS_EVT_TIMEOUT:
    // Disconnect on GATT Server timeout event.
    NRF_LOG_DEBUG("GATT Server Timeout.");
    err_code = sd_ble_gap_disconnect(p_ble_evt->evt.gatts_evt.conn_handle,
        BLE_HCI_REMOTE_USER_TERMINATED_CONNECTION);
    APP_ERROR_CHECK(err_code);
    break;

  default:
    // No implementation needed.
    break;
  }
}

/**@brief   Function for handling BLE events from peripheral applications.
 * @details Updates the status LEDs used to report the activity of the peripheral applications.
 *
 * @param[in]   p_ble_evt   Bluetooth stack event.
 */

static bool ble_evt_is_advertising_timeout(ble_evt_t const *p_ble_evt) {
  return (p_ble_evt->header.evt_id == BLE_GAP_EVT_ADV_SET_TERMINATED);
}
static void ble_evt_handler(ble_evt_t const *p_ble_evt, void *p_context) {
  uint16_t conn_handle = p_ble_evt->evt.gap_evt.conn_handle;
  uint16_t role = ble_conn_state_role(conn_handle);

  // Based on the role this device plays in the connection, dispatch to the right handler.
  if (role == BLE_GAP_ROLE_PERIPH || ble_evt_is_advertising_timeout(p_ble_evt)) {
    //ble_hrs_on_ble_evt(p_ble_evt, &m_hrs);
    ble_nus_on_ble_evt(p_ble_evt, &m_nus);
    on_ble_peripheral_evt(p_ble_evt);
  } else if ((role == BLE_GAP_ROLE_CENTRAL) || (p_ble_evt->header.evt_id == BLE_GAP_EVT_ADV_REPORT)) {
    ble_hrs_c_on_ble_evt(p_ble_evt, &m_hrs_c);
    //ble_nus_on_ble_evt(p_ble_evt,&m_nus);
    on_ble_central_evt(p_ble_evt);
  }
}

/**@brief SoftDevice SoC event handler.
 *
 * @param[in]   evt_id      SoC event.
 * @param[in]   p_context   Context.
 */
static void soc_evt_handler(uint32_t evt_id, void *p_context) {
  switch (evt_id) {
  case NRF_EVT_FLASH_OPERATION_SUCCESS:
    /* fall through */
  case NRF_EVT_FLASH_OPERATION_ERROR:

    if (m_memory_access_in_progress) {
      m_memory_access_in_progress = false;
      scan_start();
    }
    break;

  default:
    // No implementation needed.
    break;
  }
}
/**@brief Function for initializing the BLE stack.
 *
 * @details Initializes the SoftDevice and the BLE event interrupt.
 */
static void ble_stack_init(void) {
  ret_code_t err_code;

  err_code = nrf_sdh_enable_request();
  APP_ERROR_CHECK(err_code);

  // Configure the BLE stack using the default settings.
  // Fetch the start address of the application RAM.
  uint32_t ram_start = 0;
  err_code = nrf_sdh_ble_default_cfg_set(APP_BLE_CONN_CFG_TAG, &ram_start);
  APP_ERROR_CHECK(err_code);

  // Enable BLE stack.
  err_code = nrf_sdh_ble_enable(&ram_start);
  NRF_LOG_INFO("%d", err_code);
  APP_ERROR_CHECK(err_code);

  // Register handlers for BLE and SoC events.
  NRF_SDH_BLE_OBSERVER(m_ble_observer, APP_BLE_OBSERVER_PRIO, ble_evt_handler, NULL);
  NRF_SDH_SOC_OBSERVER(m_soc_observer, APP_SOC_OBSERVER_PRIO, soc_evt_handler, NULL);
}

/**@brief Function for the Peer Manager initialization.
 */
static void peer_manager_init(void) {
  ble_gap_sec_params_t sec_param;
  ret_code_t err_code;

  err_code = pm_init();
  APP_ERROR_CHECK(err_code);

  memset(&sec_param, 0, sizeof(ble_gap_sec_params_t));

  // Security parameters to be used for all security procedures.
  sec_param.bond = SEC_PARAM_BOND;
  sec_param.mitm = SEC_PARAM_MITM;
  sec_param.lesc = SEC_PARAM_LESC;
  sec_param.keypress = SEC_PARAM_KEYPRESS;
  sec_param.io_caps = SEC_PARAM_IO_CAPABILITIES;
  sec_param.oob = SEC_PARAM_OOB;
  sec_param.min_key_size = SEC_PARAM_MIN_KEY_SIZE;
  sec_param.max_key_size = SEC_PARAM_MAX_KEY_SIZE;
  sec_param.kdist_own.enc = 1;
  sec_param.kdist_own.id = 1;
  sec_param.kdist_peer.enc = 1;
  sec_param.kdist_peer.id = 1;

  err_code = pm_sec_params_set(&sec_param);
  APP_ERROR_CHECK(err_code);

  err_code = pm_register(pm_evt_handler);
  APP_ERROR_CHECK(err_code);
}

/** @brief Clear bonding information from persistent storage
 */
static void delete_bonds(void) {
  ret_code_t err_code;

  NRF_LOG_INFO("Erase bonds!");

  err_code = pm_peers_delete();
  APP_ERROR_CHECK(err_code);
}

/**@brief Function for disabling the use of whitelist for scanning.
 */
static void whitelist_disable(void) {
  if (!m_whitelist_disabled) {
    NRF_LOG_INFO("Whitelist temporarily disabled.");
    m_whitelist_disabled = true;
    nrf_ble_scan_stop();
    scan_start();
  }
}

/**@brief Function for handling events from the BSP module.
 *
 * @param[in]   event   Event generated by button press.
 */
void bsp_event_handler(bsp_event_t event) {
  ret_code_t err_code;

  switch (event) {
  case BSP_EVENT_SLEEP:
    nrf_pwr_mgmt_shutdown(NRF_PWR_MGMT_SHUTDOWN_GOTO_SYSOFF);
    break;

  case BSP_EVENT_DISCONNECT:
    err_code = sd_ble_gap_disconnect(m_conn_handle, BLE_HCI_REMOTE_USER_TERMINATED_CONNECTION);
    if (err_code != NRF_ERROR_INVALID_STATE) {
      APP_ERROR_CHECK(err_code);
    }
    break;

  case BSP_EVENT_WHITELIST_OFF:
    whitelist_disable();
    break;

  default:
    break;
  }
}

/**@brief Heart Rate Collector Handler.
 */
static void hrs_c_evt_handler(ble_hrs_c_t *p_hrs_c, ble_hrs_c_evt_t *p_hrs_c_evt) {
  NRF_LOG_INFO("hrs_c_evt_handler");
  ret_code_t err_code;

  switch (p_hrs_c_evt->evt_type) {
  case BLE_HRS_C_EVT_DISCOVERY_COMPLETE: {
    NRF_LOG_DEBUG("Heart rate service discovered.");

    err_code = ble_hrs_c_handles_assign(p_hrs_c,
        p_hrs_c_evt->conn_handle,
        &p_hrs_c_evt->params.peer_db);
    APP_ERROR_CHECK(err_code);

    // Initiate bonding.
    err_code = pm_conn_secure(p_hrs_c_evt->conn_handle, false);
    if (err_code != NRF_ERROR_BUSY) {
      APP_ERROR_CHECK(err_code);
    }

    // Heart rate service discovered. Enable notification of Heart Rate Measurement.
    err_code = ble_hrs_c_hrm_notif_enable(p_hrs_c);
    APP_ERROR_CHECK(err_code);
  } break;

  case BLE_HRS_C_EVT_HRM_NOTIFICATION: {
    NRF_LOG_INFO("Heart Rate = %d.", p_hrs_c_evt->params.hrm.hr_value);
    heart_rate = p_hrs_c_evt->params.hrm.hr_value;

    if (p_hrs_c_evt->params.hrm.rr_intervals_cnt != 0) {
      uint32_t rr_avg = 0;
      for (uint32_t i = 0; i < p_hrs_c_evt->params.hrm.rr_intervals_cnt; i++) {
        rr_avg += p_hrs_c_evt->params.hrm.rr_intervals[i];
      }
      rr_avg = rr_avg / p_hrs_c_evt->params.hrm.rr_intervals_cnt;
      NRF_LOG_DEBUG("rr_interval (avg) = %d.", rr_avg);
    }
  } break;

  default:
    break;
  }
}

/**@brief Battery level Collector Handler.
 */
static void bas_c_evt_handler(ble_bas_c_t *p_bas_c, ble_bas_c_evt_t *p_bas_c_evt) {
  NRF_LOG_INFO("bas_c_evt_handler");
  ret_code_t err_code;

  switch (p_bas_c_evt->evt_type) {
  case BLE_BAS_C_EVT_DISCOVERY_COMPLETE: {
    err_code = ble_bas_c_handles_assign(p_bas_c,
        p_bas_c_evt->conn_handle,
        &p_bas_c_evt->params.bas_db);
    APP_ERROR_CHECK(err_code);

    // Battery service discovered. Enable notification of Battery Level.
    NRF_LOG_DEBUG("Battery Service discovered. Reading battery level.");

    err_code = ble_bas_c_bl_read(p_bas_c);
    APP_ERROR_CHECK(err_code);

    NRF_LOG_DEBUG("Enabling Battery Level Notification.");
    err_code = ble_bas_c_bl_notif_enable(p_bas_c);
    APP_ERROR_CHECK(err_code);

  } break;

  case BLE_BAS_C_EVT_BATT_NOTIFICATION:
    NRF_LOG_INFO("Battery Level received %d %%.", p_bas_c_evt->params.battery_level);
    break;

  case BLE_BAS_C_EVT_BATT_READ_RESP:
    NRF_LOG_INFO("Battery Level Read as %d %%.", p_bas_c_evt->params.battery_level);
    break;

  default:
    break;
  }
}

/**
 * @brief Heart rate collector initialization.
 */
static void hrs_c_init(void) {
  NRF_LOG_INFO("HRS_C_INIT");
  ble_hrs_c_init_t hrs_c_init_obj;

  hrs_c_init_obj.evt_handler = hrs_c_evt_handler;
  hrs_c_init_obj.error_handler = service_error_handler;
  hrs_c_init_obj.p_gatt_queue = &m_ble_gatt_queue;

  ret_code_t err_code = ble_hrs_c_init(&m_hrs_c, &hrs_c_init_obj);
  APP_ERROR_CHECK(err_code);
}

/**
 * @brief Battery level collector initialization.
 */
static void bas_c_init(void) {
  NRF_LOG_INFO("BAS_C_INIT");
  ble_bas_c_init_t bas_c_init_obj;

  bas_c_init_obj.evt_handler = bas_c_evt_handler;
  bas_c_init_obj.error_handler = service_error_handler;
  bas_c_init_obj.p_gatt_queue = &m_ble_gatt_queue;

  ret_code_t err_code = ble_bas_c_init(&m_bas_c, &bas_c_init_obj);
  APP_ERROR_CHECK(err_code);
}

/**
 * @brief Database discovery collector initialization.
 */
static void db_discovery_init(void) {
  ble_db_discovery_init_t db_init;

  memset(&db_init, 0, sizeof(db_init));

  db_init.evt_handler = db_disc_handler;
  db_init.p_gatt_queue = &m_ble_gatt_queue;

  ret_code_t err_code = ble_db_discovery_init(&db_init);

  APP_ERROR_CHECK(err_code);
}

/**@brief Retrieve a list of peer manager peer IDs.
 *
 * @param[inout] p_peers   The buffer where to store the list of peer IDs.
 * @param[inout] p_size    In: The size of the @p p_peers buffer.
 *                         Out: The number of peers copied in the buffer.
 */
static void peer_list_get(pm_peer_id_t *p_peers, uint32_t *p_size) {
  pm_peer_id_t peer_id;
  uint32_t peers_to_copy;

  peers_to_copy = (*p_size < BLE_GAP_WHITELIST_ADDR_MAX_COUNT) ? *p_size : BLE_GAP_WHITELIST_ADDR_MAX_COUNT;

  peer_id = pm_next_peer_id_get(PM_PEER_ID_INVALID);
  *p_size = 0;

  while ((peer_id != PM_PEER_ID_INVALID) && (peers_to_copy--)) {
    p_peers[(*p_size)++] = peer_id;
    peer_id = pm_next_peer_id_get(peer_id);
  }
}

/**@brief Function to start scanning.
 */
static void scan_start(void) {
  ret_code_t err_code;

  if (nrf_fstorage_is_busy(NULL)) {
    m_memory_access_in_progress = true;
    return;
  }

  NRF_LOG_INFO("Starting scan.");

  err_code = nrf_ble_scan_start(&m_scan);
  APP_ERROR_CHECK(err_code);

  err_code = bsp_indication_set(BSP_INDICATE_SCANNING);
  NRF_LOG_INFO("%d", err_code);
  APP_ERROR_CHECK(err_code);
}

/**@brief Function for initializing buttons and leds.
 *
 * @param[out] p_erase_bonds  Will be true if the clear bonding button was pressed to wake the application up.
 */
static void buttons_leds_init(bool *p_erase_bonds) {
  ret_code_t err_code;
  bsp_event_t startup_event;

  err_code = bsp_init(BSP_INIT_LEDS | BSP_INIT_BUTTONS, bsp_event_handler);
  APP_ERROR_CHECK(err_code);

  err_code = bsp_btn_ble_init(NULL, &startup_event);
  APP_ERROR_CHECK(err_code);

  *p_erase_bonds = (startup_event == BSP_EVENT_CLEAR_BONDING_DATA);
}

/**@brief Function for initializing the nrf log module.
 */
static void log_init(void) {
  ret_code_t err_code = NRF_LOG_INIT(NULL);
  APP_ERROR_CHECK(err_code);

  NRF_LOG_DEFAULT_BACKENDS_INIT();
}

/**@brief Function for initializing the power management module. */
static void power_management_init(void) {
  ret_code_t err_code;
  err_code = nrf_pwr_mgmt_init();
  APP_ERROR_CHECK(err_code);
}

/**@brief GATT module event handler.
 */
static void gatt_evt_handler(nrf_ble_gatt_t *p_gatt, nrf_ble_gatt_evt_t const *p_evt) {

  if ((m_conn_handle == p_evt->conn_handle) && (p_evt->evt_id == NRF_BLE_GATT_EVT_ATT_MTU_UPDATED)) {
    m_ble_nus_max_data_len = p_evt->params.att_mtu_effective - OPCODE_LENGTH - HANDLE_LENGTH;
    NRF_LOG_INFO("Data len is set to 0x%X(%d)", m_ble_nus_max_data_len, m_ble_nus_max_data_len);
  }
  NRF_LOG_DEBUG("ATT MTU exchange completed. central 0x%x peripheral 0x%x",
      p_gatt->att_mtu_desired_central,
      p_gatt->att_mtu_desired_periph);
  switch (p_evt->evt_id) {
  case NRF_BLE_GATT_EVT_ATT_MTU_UPDATED: {
    NRF_LOG_INFO("GATT ATT MTU on connection 0x%x changed to %d.",
        p_evt->conn_handle,
        p_evt->params.att_mtu_effective);
  } break;

  case NRF_BLE_GATT_EVT_DATA_LENGTH_UPDATED: {
    NRF_LOG_INFO("Data length for connection 0x%x updated to %d.",
        p_evt->conn_handle,
        p_evt->params.data_length);
  } break;

  default:
    break;
  }
}
static void whitelist_load()
{
    ret_code_t   ret;
    pm_peer_id_t peers[8];
    uint32_t     peer_cnt;

    memset(peers, PM_PEER_ID_INVALID, sizeof(peers));
    peer_cnt = (sizeof(peers) / sizeof(pm_peer_id_t));

    // Load all peers from flash and whitelist them.
    peer_list_get(peers, &peer_cnt);

    ret = pm_whitelist_set(peers, peer_cnt);
    APP_ERROR_CHECK(ret);

    // Setup the device identies list.
    // Some SoftDevices do not support this feature.
    ret = pm_device_identities_list_set(peers, peer_cnt);
    if (ret != NRF_ERROR_NOT_SUPPORTED)
    {
        APP_ERROR_CHECK(ret);
    }
}
static void on_whitelist_req(void)
{
    ret_code_t err_code;

    // Whitelist buffers.
    ble_gap_addr_t whitelist_addrs[8];
    ble_gap_irk_t  whitelist_irks[8];

    memset(whitelist_addrs, 0x00, sizeof(whitelist_addrs));
    memset(whitelist_irks,  0x00, sizeof(whitelist_irks));

    uint32_t addr_cnt = (sizeof(whitelist_addrs) / sizeof(ble_gap_addr_t));
    uint32_t irk_cnt  = (sizeof(whitelist_irks)  / sizeof(ble_gap_irk_t));

    // Reload the whitelist and whitelist all peers.
    whitelist_load();

    // Get the whitelist previously set using pm_whitelist_set().
    err_code = pm_whitelist_get(whitelist_addrs, &addr_cnt,
                                whitelist_irks,  &irk_cnt);

    if (((addr_cnt == 0) && (irk_cnt == 0)) ||
        (m_whitelist_disabled))
    {
        // Don't use whitelist.
        err_code = nrf_ble_scan_params_set(&m_scan, NULL);
        APP_ERROR_CHECK(err_code);
    }
}
static void scan_evt_handler(scan_evt_t const *p_scan_evt) {
  ret_code_t err_code;
    switch(p_scan_evt->scan_evt_id)
    {
        case NRF_BLE_SCAN_EVT_WHITELIST_REQUEST:
        {
            on_whitelist_req();
            m_whitelist_disabled = false;
        } break;

        case NRF_BLE_SCAN_EVT_CONNECTING_ERROR:
        {
            err_code = p_scan_evt->params.connecting_err.err_code;
            APP_ERROR_CHECK(err_code);
        } break;

        case NRF_BLE_SCAN_EVT_SCAN_TIMEOUT:
        {
            NRF_LOG_INFO("Scan timed out.");
            scan_start();
        } break;

        case NRF_BLE_SCAN_EVT_FILTER_MATCH:
            break;
        case NRF_BLE_SCAN_EVT_WHITELIST_ADV_REPORT:
            break;

        default:
          break;
    }
}

/**@brief Function for initializing the timer.
 */
static void timer_init(void) {
  ret_code_t err_code = app_timer_init();
  APP_ERROR_CHECK(err_code);
}

/**@brief Function for initializing the GATT module.
 */
static void gatt_init(void) {
  ret_code_t err_code = nrf_ble_gatt_init(&m_gatt, gatt_evt_handler);
  APP_ERROR_CHECK(err_code);

  err_code = nrf_ble_gatt_att_mtu_periph_set(&m_gatt, NRF_SDH_BLE_GATT_MAX_MTU_SIZE);
  APP_ERROR_CHECK(err_code);
  err_code = nrf_ble_gatt_data_length_set(&m_gatt, BLE_CONN_HANDLE_INVALID , NRF_SDH_BLE_GAP_DATA_LENGTH);
  APP_ERROR_CHECK(err_code);

}

/**@brief Function for initialization scanning and setting filters.
 */
static void scan_init(void) {
  ret_code_t err_code;
  nrf_ble_scan_init_t init_scan;

  memset(&init_scan, 0, sizeof(init_scan));

  init_scan.p_scan_param = &m_scan_param;
  init_scan.connect_if_match = true;
  init_scan.conn_cfg_tag = APP_BLE_CONN_CFG_TAG;

  err_code = nrf_ble_scan_init(&m_scan, &init_scan, scan_evt_handler);
  APP_ERROR_CHECK(err_code);

  ble_uuid_t uuid =
      {
          .uuid = TARGET_UUID,
          .type = BLE_UUID_TYPE_BLE,
      };

  err_code = nrf_ble_scan_filter_set(&m_scan,
      SCAN_UUID_FILTER,
      &uuid);
  APP_ERROR_CHECK(err_code);

  if (strlen(m_target_periph_name) != 0) {
    err_code = nrf_ble_scan_filter_set(&m_scan,
        SCAN_NAME_FILTER,
        m_target_periph_name);
    APP_ERROR_CHECK(err_code);
  }

  if (is_connect_per_addr) {
    err_code = nrf_ble_scan_filter_set(&m_scan,
        SCAN_ADDR_FILTER,
        m_target_periph_addr.addr);
    APP_ERROR_CHECK(err_code);
  }

  err_code = nrf_ble_scan_filters_enable(&m_scan,
      NRF_BLE_SCAN_ALL_FILTER,
      false);
  APP_ERROR_CHECK(err_code);
}

/**@brief Function for handling the idle state (main loop).
 *
 * @details Handle any pending log operation(s), then sleep until the next event occurs.
 */
static void idle_state_handle(void) {
  ret_code_t err_code;

  err_code = nrf_ble_lesc_request_handler();
  APP_ERROR_CHECK(err_code);

  NRF_LOG_FLUSH();
  nrf_pwr_mgmt_run();
}

/**@brief Function for starting a scan, or instead trigger it from peer manager (after
 *        deleting bonds).
 *
 * @param[in] p_erase_bonds Pointer to a bool to determine if bonds will be deleted before scanning.
 */
void scanning_start(bool *p_erase_bonds) {
  // Start scanning for peripherals and initiate connection
  // with devices that advertise GATT Service UUID.
  if (*p_erase_bonds == true) {
    // Scan is started by the PM_EVT_PEERS_DELETE_SUCCEEDED event.
    delete_bonds();
  } else {
    scan_start();
  }
}

static void gpio_init(void) {
  ret_code_t err_code;
  NRF_LOG_INFO("INIT gpio");

  nrf_drv_gpiote_out_config_t out_config = GPIOTE_CONFIG_OUT_SIMPLE(false);

  err_code = nrf_drv_gpiote_out_init(PIN_OUT, &out_config);
  APP_ERROR_CHECK(err_code);

  nrf_drv_gpiote_in_event_enable(PIN_IN, true);
}

static void gap_params_init(void) {
  ret_code_t err_code;
  ble_gap_conn_params_t gap_conn_params;
  ble_gap_conn_sec_mode_t sec_mode;

  BLE_GAP_CONN_SEC_MODE_SET_OPEN(&sec_mode);

  err_code = sd_ble_gap_device_name_set(&sec_mode,
      (const uint8_t *)DEVICE_NAME,
      strlen(DEVICE_NAME));
  APP_ERROR_CHECK(err_code);

  memset(&gap_conn_params, 0, sizeof(gap_conn_params));

  gap_conn_params.min_conn_interval = MIN_CONN_INTERVAL;
  gap_conn_params.max_conn_interval = MAX_CONN_INTERVAL;
  gap_conn_params.slave_latency = SLAVE_LATENCY;
  gap_conn_params.conn_sup_timeout = CONN_SUP_TIMEOUT;

  err_code = sd_ble_gap_ppcp_set(&gap_conn_params);
  APP_ERROR_CHECK(err_code);
}
static void on_conn_params_evt(ble_conn_params_evt_t *p_evt) {
  uint32_t err_code;

  if (p_evt->evt_type == BLE_CONN_PARAMS_EVT_FAILED) {
    err_code = sd_ble_gap_disconnect(m_conn_handle, BLE_HCI_CONN_INTERVAL_UNACCEPTABLE);
    APP_ERROR_CHECK(err_code);
  }
}

static void conn_params_error_handler(uint32_t nrf_error) {
  APP_ERROR_HANDLER(nrf_error);
}

static void conn_params_init(void) {
  uint32_t err_code;
  ble_conn_params_init_t cp_init;

  memset(&cp_init, 0, sizeof(cp_init));

  cp_init.p_conn_params = NULL;
  cp_init.first_conn_params_update_delay = FIRST_CONN_PARAMS_UPDATE_DELAY;
  cp_init.next_conn_params_update_delay = NEXT_CONN_PARAMS_UPDATE_DELAY;
  cp_init.max_conn_params_update_count = MAX_CONN_PARAMS_UPDATE_COUNT;
  cp_init.start_on_notify_cccd_handle = BLE_GATT_HANDLE_INVALID;
  cp_init.disconnect_on_fail = false;
  cp_init.evt_handler = on_conn_params_evt;
  cp_init.error_handler = conn_params_error_handler;

  err_code = ble_conn_params_init(&cp_init);
  APP_ERROR_CHECK(err_code);
}

void uart_event_handle(app_uart_evt_t *p_event) {
  static uint8_t data_array[BLE_NUS_MAX_DATA_LEN];
  static uint8_t index = 0;
  uint32_t err_code;

  switch (p_event->evt_type) {
  case APP_UART_DATA_READY:
    NRF_LOG_INFO("uart event handle");
    UNUSED_VARIABLE(app_uart_get(&data_array[index]));
    index++;

    if ((data_array[index - 1] == '\n') ||
        (data_array[index - 1] == '\r') ||
        (index >= m_ble_nus_max_data_len)) {
      if (index > 1) {
        NRF_LOG_INFO("uart send handle");
        NRF_LOG_DEBUG("Ready to send data over BLE NUS");
        NRF_LOG_HEXDUMP_DEBUG(data_array, index);

        do {
          uint16_t length = (uint16_t)index;
          err_code = ble_nus_data_send(&m_nus, data_array, &length, m_conn_handle);
          NRF_LOG_INFO("%d", err_code);

          if ((err_code != NRF_ERROR_INVALID_STATE) &&
              (err_code != NRF_ERROR_RESOURCES) &&
              (err_code != NRF_ERROR_NOT_FOUND)) {
            APP_ERROR_CHECK(err_code);
          }
        } while (err_code == NRF_ERROR_RESOURCES);
      }

      index = 0;
    }
    break;

  case APP_UART_COMMUNICATION_ERROR:
    APP_ERROR_HANDLER(p_event->data.error_communication);
    break;

  case APP_UART_FIFO_ERROR:
    APP_ERROR_HANDLER(p_event->data.error_code);
    break;

  default:
    break;
  }
}
/**@snippet [Handling the data received over UART] */

#define UART_TX_BUF_SIZE 256 /**< UART TX buffer size. */
#define UART_RX_BUF_SIZE 256
/**@brief  Function for initializing the UART module.
 */
/**@snippet [UART Initialization] */
static void uart_init(void) {
  uint32_t err_code;
  app_uart_comm_params_t const comm_params =
  {
    .rx_pin_no = RX_PIN_NUMBER,
    .tx_pin_no = TX_PIN_NUMBER,
    .rts_pin_no = RTS_PIN_NUMBER,
    .cts_pin_no = CTS_PIN_NUMBER,
    .flow_control = APP_UART_FLOW_CONTROL_DISABLED,
    .use_parity = false,
#if defined(UART_PRESENT)
    .baud_rate = NRF_UART_BAUDRATE_115200
#else
    .baud_rate = NRF_UARTE_BAUDRATE_115200
#endif
  };

  APP_UART_FIFO_INIT(&comm_params,
      UART_RX_BUF_SIZE,
      UART_TX_BUF_SIZE,
      uart_event_handle,
      APP_IRQ_PRIORITY_LOWEST,
      err_code);
  APP_ERROR_CHECK(err_code);
}
static void nrf_qwr_error_handler(uint32_t nrf_error) {
  APP_ERROR_HANDLER(nrf_error);
}
static void nus_data_handler(ble_nus_evt_t *p_evt) {

  if (p_evt->type == BLE_NUS_EVT_RX_DATA) {
    uint32_t err_code;
    nrf_delay_ms(10);
    NRF_LOG_DEBUG("Received data from BLE NUS. Writing data on UART.");
    NRF_LOG_INFO("rom BLE NUS. ");
    NRF_LOG_HEXDUMP_DEBUG(p_evt->params.rx_data.p_data, p_evt->params.rx_data.length);

    for (uint32_t i = 0; i < p_evt->params.rx_data.length; i++) {
      NRF_LOG_INFO("1 ");
      do {
        err_code = app_uart_put(p_evt->params.rx_data.p_data[i]);
        if ((err_code != NRF_SUCCESS) && (err_code != NRF_ERROR_BUSY)) {
          NRF_LOG_ERROR("Failed receiving NUS message. Error 0x%x. ", err_code);
          APP_ERROR_CHECK(err_code);
        }
      } while (err_code == NRF_ERROR_BUSY);
    }
    if (p_evt->params.rx_data.p_data[p_evt->params.rx_data.length - 1] == '\r') {
      while (app_uart_put('\n') == NRF_ERROR_BUSY)
        ;
    }
  }
}
static void sleep_mode_enter(void) {
  uint32_t err_code = bsp_indication_set(BSP_INDICATE_IDLE);
  APP_ERROR_CHECK(err_code);

  // Prepare wakeup buttons.
  err_code = bsp_btn_ble_sleep_mode_prepare();
  APP_ERROR_CHECK(err_code);

  // Go to system-off mode (this function will not return; wakeup will cause a reset).
  err_code = sd_power_system_off();
  APP_ERROR_CHECK(err_code);
}
static void services_init(void) {
  uint32_t err_code;
  ble_nus_init_t nus_init;
  nrf_ble_qwr_init_t qwr_init = {0};

  // Initialize Queued Write Module.
  qwr_init.error_handler = nrf_qwr_error_handler;

  for (uint32_t i = 0; i < NRF_SDH_BLE_TOTAL_LINK_COUNT; i++) {
    err_code = nrf_ble_qwr_init(&m_qwr[i], &qwr_init);
    APP_ERROR_CHECK(err_code);
  }

  // Initialize NUS.
  memset(&nus_init, 0, sizeof(nus_init));

  nus_init.data_handler = nus_data_handler;

  err_code = ble_nus_init(&m_nus, &nus_init);
  APP_ERROR_CHECK(err_code);
}
static void on_adv_evt(ble_adv_evt_t ble_adv_evt) {
  uint32_t err_code;

  switch (ble_adv_evt) {
  case BLE_ADV_EVT_FAST:
    err_code = bsp_indication_set(BSP_INDICATE_ADVERTISING);
    APP_ERROR_CHECK(err_code);
    break;
  case BLE_ADV_EVT_IDLE:
    sleep_mode_enter();
    break;
  default:
    break;
  }
}

static void advertising_init(void) {
  uint32_t err_code;
  ble_advertising_init_t init;

  memset(&init, 0, sizeof(init));

  init.advdata.name_type = BLE_ADVDATA_FULL_NAME;
  init.advdata.include_appearance = false;
  init.advdata.flags = BLE_GAP_ADV_FLAGS_LE_ONLY_LIMITED_DISC_MODE;

  init.srdata.uuids_complete.uuid_cnt = sizeof(m_adv_uuids) / sizeof(m_adv_uuids[0]);
  init.srdata.uuids_complete.p_uuids = m_adv_uuids;

  init.config.ble_adv_fast_enabled = true;
  init.config.ble_adv_fast_interval = APP_ADV_INTERVAL;
  init.config.ble_adv_fast_timeout = APP_ADV_DURATION;
  init.evt_handler = on_adv_evt;

  err_code = ble_advertising_init(&m_advertising, &init);
  APP_ERROR_CHECK(err_code);

  ble_advertising_conn_cfg_tag_set(&m_advertising, APP_BLE_CONN_CFG_TAG);
}

static void advertising_start(void) {
  uint32_t err_code = ble_advertising_start(&m_advertising, BLE_ADV_MODE_FAST);
  APP_ERROR_CHECK(err_code);
}

void conn_evt_len_ext_set(void)
{
    ret_code_t err_code;
    ble_opt_t  opt;

    memset(&opt, 0x00, sizeof(opt));
    opt.common_opt.conn_evt_ext.enable = 1;

    err_code = sd_ble_opt_set(BLE_COMMON_OPT_CONN_EVT_EXT, &opt);
    APP_ERROR_CHECK(err_code);
}
int main(void) {

  bool erase_bonds;
  uint32_t time_ms = 1; //Time(in miliseconds) between consecutive compare events.
  uint32_t time_ticks;
  
  uint8_t gyrox=0;
  uint8_t gyroy=1;
  uint8_t gyroz=2;
  uint8_t accelx=3,accely=4,accelz=5;
  uint8_t magx=2,magy=2,magz=2;
  uint16_t counter=0;
  uint8_t lat=6,lon=7,alt=8;
  static uint8_t data_array2[150];
  

  uint32_t err_code = NRF_SUCCESS;
  uart_init();
  log_init();

  timer_init();
  power_management_init();
  buttons_leds_init(&erase_bonds);
  ble_stack_init();
  conn_evt_len_ext_set();
  gatt_init();
  peer_manager_init();
  db_discovery_init();
  hrs_c_init();
  bas_c_init();
  scan_init();
  gap_params_init();
  services_init();
  advertising_init();
  conn_params_init();
  
  //nrf_drv_timer_config_t timer_cfg = NRF_DRV_TIMER_DEFAULT_CONFIG;
  //err_code = nrf_drv_timer_init(&TIMER_LED, &timer_cfg, timer_led_event_handler);
  //APP_ERROR_CHECK(err_code);
  //time_ticks = nrf_drv_timer_ms_to_ticks(&TIMER_LED, time_ms);
  //nrf_drv_timer_extended_compare(&TIMER_LED, NRF_TIMER_CC_CHANNEL0, time_ticks, NRF_TIMER_SHORT_COMPARE0_CLEAR_MASK, true);
  //nrf_drv_timer_enable(&TIMER_LED);
  //gpio_init();
  
  
  
  NRF_LOG_INFO("Heart Rate collector example started.");

  // fatfs_example();

  int store_data=1;
  int first_row = 1;
  int peristat2;
  if (erase_bonds == true) {
    // Scanning and advertising is done upon PM_EVT_PEERS_DELETE_SUCCEEDED event.
    delete_bonds();
  } else {
    adv_scan_start();
  }
  nrf_delay_ms(9000);
  // Enter main loop.
  for (;;) {
    //idle_state_handle();
    if(peristat2==1)
    {
    //NRF_LOG_INFO("START");
     if(counter<8000)
        {
        
                   //if(BLE_GATTS_EVT_SYS_ATTR_MISSING)
                   //{
                   //err_code = sd_ble_gatts_sys_attr_set(m_conn_handle, NULL, 0,0);
                   //APP_ERROR_CHECK(err_code);
                   //}

                    NRF_LOG_INFO("%d",counter);
                    sprintf(data_array2,"{\"g_x\":%d,\"g_y\":%d,\"g_z\":%d,\"a_x\":%d,\"a_y\":%d,\"a_z\":%d,\"m_x\":%d,\"m_y\":%d,\"m_z\":%d,\"lat\":%d,\"lon\":%d,\"alt\":%d,\"hb\":%d}",gyrox,gyroy,gyroz,accelx,accely,accelz,magx,magy,magz,lat,lon,alt,heart_rate);
                    //NRF_LOG_INFO("%d",strlen(data_array2));
                    NRF_LOG_DEBUG("Ready to send data over BLE NUS");
                    NRF_LOG_HEXDUMP_DEBUG(data_array2, 0);
                    do
                    {

                    
                        uint16_t length = (uint16_t)150;
                        err_code = ble_nus_data_send(&m_nus, data_array2, &length, m_conn_handle);
                       
                        
                        
                        if ((err_code != NRF_ERROR_INVALID_STATE) &&
                            (err_code != NRF_ERROR_RESOURCES) &&
                            (err_code != NRF_ERROR_NOT_FOUND))
                        {
                          
                           APP_ERROR_CHECK(err_code);
                        }
                    } while (err_code == NRF_ERROR_RESOURCES);
                    
                      gyrox++;
                      gyroy++;
                      gyroz++;
                      accelx++;
                      accely++;
                      accelz++;
                      magx++;
                      magy++;
                      magz++;
                      counter++;
                      lon++;
                      lat++;
                      alt++;
                      }timer_call=0;
                      
    
    
    }
    else if(store_data==1)
    {
    if(peristat==1)
    {
    fatfs_example();
    store_data=0;
    }
    }



}

  
}

[quote userid="87869" url="~/f/nordic-q-a/80125/want-to-achieve-1-2-mbps-through-ble/335592#335592"]At the end it seems like the device is reset. Did you reset it manually, or did this happen due to an error occurring in the program?[/quote]

No i didn't reset it but i think i disconnected the device .

RE: want to achieve 1-2 Mbps through BLE.

Karl Ylvisaker — Sun, 24 Oct 2021 16:34:06 GMT

[quote user="Mohsin khan"]No i am not sending any data to uart at the time . [/quote][quote user="Mohsin khan"]I am just sending data and calculate time my self and self calculating the throughput .[/quote]

Thank you for confirming this. Reading out the throughput manually will not give the most accurate readings. For accurate readings you should instead have the central close the connection (or disable CCCD) after a given time, and write out the number of bytes it received in the time that the test was running. The timer could for example be started when the first notification is received.

[quote user="Mohsin khan"]these are logs of nrf connect while i am connecting with both nrf connect and nrf toolbox .[/quote]

In the first of these logs it no longer appears that the preferred PHY is updated, so here again you seem to be using the 1 M PHY. In your previous logs there was a PHY update request that was accepted, making the connection use 2 M PHY, this seems to be missing in the latest log.

The last of the two logs seems to be from the central, which is able to connect at first, but then it resumes scanning - are you attempting to connect multiple devices to your central? Could you also elaborate on the section in which the data length is updated multiple times in a row - why is this done?
It also seems like the central is unable to find any other peripherals after the initial connection, and that there is no activity on the initial connection (though I do not see a disconnected message either, so I assume the connection is still going all through the log).
At the end it seems like the device is reset. Did you reset it manually, or did this happen due to an error occurring in the program?

Could you also provide the logs from the peripheral's side?

Best regards,
Karl

RE: want to achieve 1-2 Mbps through BLE.

Mohsin khan — Thu, 21 Oct 2021 10:31:48 GMT

[quote userid="87869" url="~/f/nordic-q-a/80125/want-to-achieve-1-2-mbps-through-ble/335251#335251"]Please provide the logs for all these instances so I may take a look.
Please also include the peripheral's logs for these instances.[/quote]

nRF Connect, 2021-10-21
nRF Relay (E0:F3:99:D1:24:FB)
I	15:21:45.861	[Server] Server started
V	15:21:45.861	[Server] Creating services...
D	15:21:45.861	[Server callback] Connection state changed with status: 0 and new state: CONNECTED (2)
I	15:21:45.861	[Server] Device with address E0:F3:99:D1:24:FB connected
D	15:21:45.862	[Server callback] Service 0000180d-0000-1000-8000-00805f9b34fb added with status: 0
D	15:21:45.862	server.addService(0000aaa0-0000-1000-8000-aabbccddeeff)
D	15:21:45.870	[Server callback] Service 0000aaa0-0000-1000-8000-aabbccddeeff added with status: 0
D	15:21:45.870	server.addService(0000181c-0000-1000-8000-00805f9b34fb)
D	15:21:45.875	[Server callback] Service 0000181c-0000-1000-8000-00805f9b34fb added with status: 0
I	15:21:45.876	[Server] Database changed
V	15:21:45.886	Heart Rate (0x180D)
- Heart Rate Measurement [N] (0x2A37)
   Client Characteristic Configuration (0x2902)
- Body Sensor Location [R] (0x2A38)
- Heart Rate Control Point [W] (0x2A39)
Unknown Service (0000aaa0-0000-1000-8000-aabbccddeeff)
- Unknown Characteristic [N R] (0000aaa1-0000-1000-8000-aabbccddeeff)
   Client Characteristic Configuration (0x2902)
   Unknown Descriptor (0000aab0-0000-1000-8000-aabbccddeeff)
   Characteristic User Description (0x2901)
   Characteristic Presentation Format (0x2904)
- Unknown Characteristic [I W WNR] (0000aaa2-0000-1000-8000-aabbccddeeff)
   Client Characteristic Configuration (0x2902)
User Data (0x181C)
- First Name [R W] (0x2A8A)
- Last Name [R W] (0x2A90)
- Gender [R W] (0x2A8C)
V	15:21:46.199	Connecting to E0:F3:99:D1:24:FB...
D	15:21:46.199	gatt = device.connectGatt(autoConnect = false, TRANSPORT_LE, opportunistic = true, preferred PHY = LE 1M) (hidden)
D	15:21:46.206	[Callback] Connection state changed with status: 0 and new state: CONNECTED (2)
I	15:21:46.206	Connected to E0:F3:99:D1:24:FB
I	15:21:46.207	MTU changed to: 247
V	15:21:46.222	Discovering services...
D	15:21:46.222	gatt.discoverServices()
V	15:21:46.294	Discovering services...
D	15:21:46.294	gatt.discoverServices()
D	15:21:46.294	[Callback] Services discovered with status: 0
I	15:21:46.294	Services discovered
V	15:21:46.297	Generic Access (0x1800)
- Device Name [R W] (0x2A00)
- Appearance [R] (0x2A01)
- Peripheral Preferred Connection Parameters [R] (0x2A04)
- Central Address Resolution [R] (0x2AA6)
Generic Attribute (0x1801)
Nordic UART Service (6e400001-b5a3-f393-e0a9-e50e24dcca9e)
- RX Characteristic [W WNR] (6e400002-b5a3-f393-e0a9-e50e24dcca9e)
- TX Characteristic [N] (6e400003-b5a3-f393-e0a9-e50e24dcca9e)
   Client Characteristic Configuration (0x2902)
D	15:21:46.297	gatt.setCharacteristicNotification(6e400003-b5a3-f393-e0a9-e50e24dcca9e, true)
D	15:21:46.302	[Callback] Services discovered with status: 0
I	15:21:46.302	Services discovered
V	15:21:46.306	Generic Access (0x1800)
- Device Name [R W] (0x2A00)
- Appearance [R] (0x2A01)
- Peripheral Preferred Connection Parameters [R] (0x2A04)
- Central Address Resolution [R] (0x2AA6)
Generic Attribute (0x1801)
Nordic UART Service (6e400001-b5a3-f393-e0a9-e50e24dcca9e)
- RX Characteristic [W WNR] (6e400002-b5a3-f393-e0a9-e50e24dcca9e)
- TX Characteristic [N] (6e400003-b5a3-f393-e0a9-e50e24dcca9e)
   Client Characteristic Configuration (0x2902)
D	15:21:46.306	gatt.setCharacteristicNotification(6e400003-b5a3-f393-e0a9-e50e24dcca9e, true)
I	15:21:46.594	Notification received from 6e400003-b5a3-f393-e0a9-e50e24dcca9e, value: (0x) 0D-0A-32-32-32-31-2C-32-32-32-31-2C-32-32-32-31-2C-32-32-32-31-2C-32-32-32-31-2C-32-32-32-31-2C-32-32-32-31-2C-32-32-32-31-2C-32-32-32-31-2C-32-32-32-31-2C-32-32-32-31-2C-32-32-32-31-2C-38-39-2C-32-32-32-31-2C-32-0D-0A-32-32-32-31-2C-32-32-32-31-2C-32-32-32-31-2C-32-32-32-31-2C-32-32-32-31-2C-32-32-32-31-2C-32-32-32-31-2C-32-32-32-31-2C-32-32-32-31-2C-32-32-32-31-2C-32-32-32-31-2C-32-32-32-31-2C-38-39-2C-32-32-32-31-2C-33-0D-0A-32-32-32-31-2C-32
A	15:21:46.594	"
2221,2221,2221,2221,2221,2221,2221,2221,2221,2221,2221,2221,89,2221,2
2221,2221,2221,2221,2221,2221,2221,2221,2221,2221,2221,2221,89,2221,3
2221,2" received
I	15:21:46.728	Notification received from 6e400003-b5a3-f393-e0a9-e50e24dcca9e, value: (0x) 32-32-31-2C-32-32-32-31-2C-32-32-32-31-2C-32-32-32-31-2C-32-32-32-31-2C-32-32-32-31-2C-32-32-32-31-2C-32-32-32-31-2C-32-32-32-31-2C-32-32-32-31-2C-32-32-32-31-2C-38-39-2C-32-32-32-31-2C-34-0D-0A-32-32-32-31-2C-32-32-32-31-2C-32-32-32-31-2C-32-32-32-31-2C-32-32-32-31-2C-32-32-32-31-2C-32-32-32-31-2C-32-32-32-31-2C-32-32-32-31-2C-32-32-32-31-2C-32-32-32-31-2C-32-32-32-31-2C-38-39-2C-32-32-32-31-2C-35-0D-0A-32-32-32-31-2C-32-32-32-31-2C-32-32-32-31
A	15:21:46.728	"221,2221,2221,2221,2221,2221,2221,2221,2221,2221,2221,89,2221,4
2221,2221,2221,2221,2221,2221,2221,2221,2221,2221,2221,2221,89,2221,5
2221,2221,2221" received
I	15:21:46.772	Notification received from 6e400003-b5a3-f393-e0a9-e50e24dcca9e, value: (0x) 2C-32-32-32-31-2C-32-32-32-31-2C-32-32-32-31-2C-32-32-32-31-2C-32-32-32-31-2C-32-32-32-31-2C-32-32-32-31-2C-32-32-32-31-2C-32-32-32-31-2C-38-39-2C-32-32-32-31-2C-36-0D-0A-32-32-32-31-2C-32-32-32-31-2C-32-32-32-31-2C-32-32-32-31-2C-32-32-32-31-2C-32-32-32-31-2C-32-32-32-31-2C-32-32-32-31-2C-32-32-32-31-2C-32-32-32-31-2C-32-32-32-31-2C-32-32-32-31-2C-38-39-2C-32-32-32-31-2C-37-0D-0A-32-32-32-31-2C-32-32-32-31-2C-32-32-32-31-2C-32-32-32-31-2C-32-32
A	15:21:46.772	",2221,2221,2221,2221,2221,2221,2221,2221,2221,89,2221,6
2221,2221,2221,2221,2221,2221,2221,2221,2221,2221,2221,2221,89,2221,7
2221,2221,2221,2221,22" received
I	15:21:46.773	Notification received from 6e400003-b5a3-f393-e0a9-e50e24dcca9e, value: (0x) 32-31-2C-32-32-32-31-2C-32-32-32-31-2C-32-32-32-31-2C-32-32-32-31-2C-32-32-32-31-2C-32-32-32-31-2C-32-32-32-31-2C-38-39-2C-32-32-32-31-2C-38-0D-0A-32-32-32-31-2C-32-32-32-31-2C-32-32-32-31-2C-32-32-32-31-2C-32-32-32-31-2C-32-32-32-31-2C-32-32-32-31-2C-32-32-32-31-2C-32-32-32-31-2C-32-32-32-31-2C-32-32-32-31-2C-32-32-32-31-2C-38-39-2C-32-32-32-31-2C-39-0D-0A-32-32-32-31-2C-32-32-32-31-2C-32-32-32-31-2C-32-32-32-31-2C-32-32-32-31-2C-32-32-32-31-2C
A	15:21:46.773	"21,2221,2221,2221,2221,2221,2221,2221,89,2221,8
2221,2221,2221,2221,2221,2221,2221,2221,2221,2221,2221,2221,89,2221,9
2221,2221,2221,2221,2221,2221," received
I	15:21:46.774	Notification received from 6e400003-b5a3-f393-e0a9-e50e24dcca9e, value: (0x) 32-32-32-31-2C-32-32-32-31-2C-32-32-32-31-2C-32-32-32-31-2C-32-32-32-31-2C-32-32-32-31-2C-38-39-2C-32-32-32-31-2C-31-30-0D-0A-32-32-32-31-2C-32-32-32-31-2C-32-32-32-31-2C-32-32-32-31-2C-32-32-32-31-2C-32-32-32-31-2C-32-32-32-31-2C-32-32-32-31-2C-32-32-32-31-2C-32-32-32-31-2C-32-32-32-31-2C-32-32-32-31-2C-38-39-2C-32-32-32-31-2C-31-31-0D-0A-32-32-32-31-2C-32-32-32-31-2C-32-32-32-31-2C-32-32-32-31-2C-32-32-32-31-2C-32-32-32-31-2C-32-32-32-31-2C-32
A	15:21:46.774	"2221,2221,2221,2221,2221,2221,89,2221,10
2221,2221,2221,2221,2221,2221,2221,2221,2221,2221,2221,2221,89,2221,11
2221,2221,2221,2221,2221,2221,2221,2" received
I	15:21:46.776	Notification received from 6e400003-b5a3-f393-e0a9-e50e24dcca9e, value: (0x) 32-32-31-2C-32-32-32-31-2C-32-32-32-31-2C-32-32-32-31-2C-32-32-32-31-2C-38-39-2C-32-32-32-31-2C-31-32-0D-0A-32-32-32-31-2C-32-32-32-31-2C-32-32-32-31-2C-32-32-32-31-2C-32-32-32-31-2C-32-32-32-31-2C-32-32-32-31-2C-32-32-32-31-2C-32-32-32-31-2C-32-32-32-31-2C-32-32-32-31-2C-32-32-32-31-2C-38-39-2C-32-32-32-31-2C-31-33-0D-0A-32-32-32-31-2C-32-32-32-31-2C-32-32-32-31-2C-32-32-32-31-2C-32-32-32-31-2C-32-32-32-31-2C-32-32-32-31-2C-32-32-32-31-2C-32-32
A	15:21:46.776	"221,2221,2221,2221,2221,89,2221,12
2221,2221,2221,2221,2221,2221,2221,2221,2221,2221,2221,2221,89,2221,13
2221,2221,2221,2221,2221,2221,2221,2221,22" received
I	15:21:46.777	Notification received from 6e400003-b5a3-f393-e0a9-e50e24dcca9e, value: (0x) 32-31-2C-32-32-32-31-2C-32-32-32-31-2C-32-32-32-31-2C-38-39-2C-32-32-32-31-2C-31-34-0D-0A-32-32-32-31-2C-32-32-32-31-2C-32-32-32-31-2C-32-32-32-31-2C-32-32-32-31-2C-32-32-32-31-2C-32-32-32-31-2C-32-32-32-31-2C-32-32-32-31-2C-32-32-32-31-2C-32-32-32-31-2C-32-32-32-31-2C-38-39-2C-32-32-32-31-2C-31-35-0D-0A-32-32-32-31-2C-32-32-32-31-2C-32-32-32-31-2C-32-32-32-31-2C-32-32-32-31-2C-32-32-32-31-2C-32-32-32-31-2C-32-32-32-31-2C-32-32-32-31-2C-32-32-32
A	15:21:46.777	"21,2221,2221,2221,89,2221,14
2221,2221,2221,2221,2221,2221,2221,2221,2221,2221,2221,2221,89,2221,15
2221,2221,2221,2221,2221,2221,2221,2221,2221,222" received
I	15:21:46.778	Notification received from 6e400003-b5a3-f393-e0a9-e50e24dcca9e, value: (0x) 31-2C-32-32-32-31-2C-32-32-32-31-2C-38-39-2C-32-32-32-31-2C-31-36-0D-0A-32-32-32-31-2C-32-32-32-31-2C-32-32-32-31-2C-32-32-32-31-2C-32-32-32-31-2C-32-32-32-31-2C-32-32-32-31-2C-32-32-32-31-2C-32-32-32-31-2C-32-32-32-31-2C-32-32-32-31-2C-32-32-32-31-2C-38-39-2C-32-32-32-31-2C-31-37-0D-0A-32-32-32-31-2C-32-32-32-31-2C-32-32-32-31-2C-32-32-32-31-2C-32-32-32-31-2C-32-32-32-31-2C-32-32-32-31-2C-32-32-32-31-2C-32-32-32-31-2C-32-32-32-31-2C-32-32-32-31
A	15:21:46.778	"1,2221,2221,89,2221,16
2221,2221,2221,2221,2221,2221,2221,2221,2221,2221,2221,2221,89,2221,17
2221,2221,2221,2221,2221,2221,2221,2221,2221,2221,2221" received
I	15:21:46.780	Notification received from 6e400003-b5a3-f393-e0a9-e50e24dcca9e, value: (0x) 2C-32-32-32-31-2C-38-39-2C-32-32-32-31-2C-31-38-0D-0A-32-32-32-31-2C-32-32-32-31-2C-32-32-32-31-2C-32-32-32-31-2C-32-32-32-31-2C-32-32-32-31-2C-32-32-32-31-2C-32-32-32-31-2C-32-32-32-31-2C-32-32-32-31-2C-32-32-32-31-2C-32-32-32-31-2C-38-39-2C-32-32-32-31-2C-31-39-0D-0A-32-32-32-31-2C-32-32-32-31-2C-32-32-32-31-2C-32-32-32-31-2C-32-32-32-31-2C-32-32-32-31-2C-32-32-32-31-2C-32-32-32-31-2C-32-32-32-31-2C-32-32-32-31-2C-32-32-32-31-2C-32-32-32-31-2C
A	15:21:46.780	",2221,89,2221,18
2221,2221,2221,2221,2221,2221,2221,2221,2221,2221,2221,2221,89,2221,19
2221,2221,2221,2221,2221,2221,2221,2221,2221,2221,2221,2221," received
I	15:21:46.781	Notification received from 6e400003-b5a3-f393-e0a9-e50e24dcca9e, value: (0x) 38-39-2C-32-32-32-31-2C-32-30-0D-0A-32-32-32-31-2C-32-32-32-31-2C-32-32-32-31-2C-32-32-32-31-2C-32-32-32-31-2C-32-32-32-31-2C-32-32-32-31-2C-32-32-32-31-2C-32-32-32-31-2C-32-32-32-31-2C-32-32-32-31-2C-32-32-32-31-2C-38-39-2C-32-32-32-31-2C-32-31-0D-0A-32-32-32-31-2C-32-32-32-31-2C-32-32-32-31-2C-32-32-32-31-2C-32-32-32-31-2C-32-32-32-31-2C-32-32-32-31-2C-32-32-32-31-2C-32-32-32-31-2C-32-32-32-31-2C-32-32-32-31-2C-32-32-32-31-2C-38-39-2C-32-32-32
A	15:21:46.781	"89,2221,20
2221,2221,2221,2221,2221,2221,2221,2221,2221,2221,2221,2221,89,2221,21
2221,2221,2221,2221,2221,2221,2221,2221,2221,2221,2221,2221,89,222" received
I	15:21:46.782	Notification received from 6e400003-b5a3-f393-e0a9-e50e24dcca9e, value: (0x) 31-2C-32-32-0D-0A-32-32-32-31-2C-32-32-32-31-2C-32-32-32-31-2C-32-32-32-31-2C-32-32-32-31-2C-32-32-32-31-2C-32-32-32-31-2C-32-32-32-31-2C-32-32-32-31-2C-32-32-32-31-2C-32-32-32-31-2C-32-32-32-31-2C-38-39-2C-32-32-32-31-2C-32-33-0D-0A-32-32-32-31-2C-32-32-32-31-2C-32-32-32-31-2C-32-32-32-31-2C-32-32-32-31-2C-32-32-32-31-2C-32-32-32-31-2C-32-32-32-31-2C-32-32-32-31-2C-32-32-32-31-2C-32-32-32-31-2C-32-32-32-31-2C-38-39-2C-32-32-32-31-2C-32-34-0D-0A
A	15:21:46.782	"1,22
2221,2221,2221,2221,2221,2221,2221,2221,2221,2221,2221,2221,89,2221,23
2221,2221,2221,2221,2221,2221,2221,2221,2221,2221,2221,2221,89,2221,24
" received
I	15:21:46.783	Notification received from 6e400003-b5a3-f393-e0a9-e50e24dcca9e, value: (0x) 32-32-32-31-2C-32-32-32-31-2C-32-32-32-31-2C-32-32-32-31-2C-32-32-32-31-2C-32-32-32-31-2C-32-32-32-31-2C-32-32-32-31-2C-32-32-32-31-2C-32-32-32-31-2C-32-32-32-31-2C-32-32-32-31-2C-38-39-2C-32-32-32-31-2C-32-35-0D-0A-32-32-32-31-2C-32-32-32-31-2C-32-32-32-31-2C-32-32-32-31-2C-32-32-32-31-2C-32-32-32-31-2C-32-32-32-31-2C-32-32-32-31-2C-32-32-32-31-2C-32-32-32-31-2C-32-32-32-31-2C-32-32-32-31-2C-38-39-2C-32-32-32-31-2C-32-36-0D-0A-32-32-32-31-2C-32
A	15:21:46.783	"2221,2221,2221,2221,2221,2221,2221,2221,2221,2221,2221,2221,89,2221,25
2221,2221,2221,2221,2221,2221,2221,2221,2221,2221,2221,2221,89,2221,26
2221,2" received
I	15:21:46.784	Notification received from 6e400003-b5a3-f393-e0a9-e50e24dcca9e, value: (0x) 32-32-31-2C-32-32-32-31-2C-32-32-32-31-2C-32-32-32-31-2C-32-32-32-31-2C-32-32-32-31-2C-32-32-32-31-2C-32-32-32-31-2C-32-32-32-31-2C-32-32-32-31-2C-32-32-32-31-2C-38-39-2C-32-32-32-31-2C-32-37-0D-0A-32-32-32-31-2C-32-32-32-31-2C-32-32-32-31-2C-32-32-32-31-2C-32-32-32-31-2C-32-32-32-31-2C-32-32-32-31-2C-32-32-32-31-2C-32-32-32-31-2C-32-32-32-31-2C-32-32-32-31-2C-32-32-32-31-2C-38-39-2C-32-32-32-31-2C-32-38-0D-0A-32-32-32-31-2C-32-32-32-31-2C-32-32
A	15:21:46.784	"221,2221,2221,2221,2221,2221,2221,2221,2221,2221,2221,89,2221,27
2221,2221,2221,2221,2221,2221,2221,2221,2221,2221,2221,2221,89,2221,28
2221,2221,22" received
I	15:21:46.785	Notification received from 6e400003-b5a3-f393-e0a9-e50e24dcca9e, value: (0x) 32-31-2C-32-32-32-31-2C-32-32-32-31-2C-32-32-32-31-2C-32-32-32-31-2C-32-32-32-31-2C-32-32-32-31-2C-32-32-32-31-2C-32-32-32-31-2C-32-32-32-31-2C-38-39-2C-32-32-32-31-2C-32-39-0D-0A-32-32-32-31-2C-32-32-32-31-2C-32-32-32-31-2C-32-32-32-31-2C-32-32-32-31-2C-32-32-32-31-2C-32-32-32-31-2C-32-32-32-31-2C-32-32-32-31-2C-32-32-32-31-2C-32-32-32-31-2C-32-32-32-31-2C-38-39-2C-32-32-32-31-2C-33-30-0D-0A-32-32-32-31-2C-32-32-32-31-2C-32-32-32-31-2C-32-32-32
A	15:21:46.785	"21,2221,2221,2221,2221,2221,2221,2221,2221,2221,89,2221,29
2221,2221,2221,2221,2221,2221,2221,2221,2221,2221,2221,2221,89,2221,30
2221,2221,2221,222" received
I	15:21:46.786	Notification received from 6e400003-b5a3-f393-e0a9-e50e24dcca9e, value: (0x) 31-2C-32-32-32-31-2C-32-32-32-31-2C-32-32-32-31-2C-32-32-32-31-2C-32-32-32-31-2C-32-32-32-31-2C-32-32-32-31-2C-32-32-32-31-2C-38-39-2C-32-32-32-31-2C-33-31-0D-0A-32-32-32-31-2C-32-32-32-31-2C-32-32-32-31-2C-32-32-32-31-2C-32-32-32-31-2C-32-32-32-31-2C-32-32-32-31-2C-32-32-32-31-2C-32-32-32-31-2C-32-32-32-31-2C-32-32-32-31-2C-32-32-32-31-2C-38-39-2C-32-32-32-31-2C-33-32-0D-0A-32-32-32-31-2C-32-32-32-31-2C-32-32-32-31-2C-32-32-32-31-2C-32-32-32-31
A	15:21:46.786	"1,2221,2221,2221,2221,2221,2221,2221,2221,89,2221,31
2221,2221,2221,2221,2221,2221,2221,2221,2221,2221,2221,2221,89,2221,32
2221,2221,2221,2221,2221" received
I	15:21:46.787	Notification received from 6e400003-b5a3-f393-e0a9-e50e24dcca9e, value: (0x) 2C-32-32-32-31-2C-32-32-32-31-2C-32-32-32-31-2C-32-32-32-31-2C-32-32-32-31-2C-32-32-32-31-2C-32-32-32-31-2C-38-39-2C-32-32-32-31-2C-33-33-0D-0A-32-32-32-31-2C-32-32-32-31-2C-32-32-32-31-2C-32-32-32-31-2C-32-32-32-31-2C-32-32-32-31-2C-32-32-32-31-2C-32-32-32-31-2C-32-32-32-31-2C-32-32-32-31-2C-32-32-32-31-2C-32-32-32-31-2C-38-39-2C-32-32-32-31-2C-33-34-0D-0A-32-32-32-31-2C-32-32-32-31-2C-32-32-32-31-2C-32-32-32-31-2C-32-32-32-31-2C-32-32-32-31-2C
A	15:21:46.787	",2221,2221,2221,2221,2221,2221,2221,89,2221,33
2221,2221,2221,2221,2221,2221,2221,2221,2221,2221,2221,2221,89,2221,34
2221,2221,2221,2221,2221,2221," received
I	15:21:46.788	Notification received from 6e400003-b5a3-f393-e0a9-e50e24dcca9e, value: (0x) 32-32-32-31-2C-32-32-32-31-2C-32-32-32-31-2C-32-32-32-31-2C-32-32-32-31-2C-32-32-32-31-2C-38-39-2C-32-32-32-31-2C-33-35-0D-0A-32-32-32-31-2C-32-32-32-31-2C-32-32-32-31-2C-32-32-32-31-2C-32-32-32-31-2C-32-32-32-31-2C-32-32-32-31-2C-32-32-32-31-2C-32-32-32-31-2C-32-32-32-31-2C-32-32-32-31-2C-32-32-32-31-2C-38-39-2C-32-32-32-31-2C-33-36-0D-0A-32-32-32-31-2C-32-32-32-31-2C-32-32-32-31-2C-32-32-32-31-2C-32-32-32-31-2C-32-32-32-31-2C-32-32-32-31-2C-32
A	15:21:46.788	"2221,2221,2221,2221,2221,2221,89,2221,35
2221,2221,2221,2221,2221,2221,2221,2221,2221,2221,2221,2221,89,2221,36
2221,2221,2221,2221,2221,2221,2221,2" received
I	15:21:46.789	Notification received from 6e400003-b5a3-f393-e0a9-e50e24dcca9e, value: (0x) 32-32-31-2C-32-32-32-31-2C-32-32-32-31-2C-32-32-32-31-2C-32-32-32-31-2C-38-39-2C-32-32-32-31-2C-33-37-0D-0A-32-32-32-31-2C-32-32-32-31-2C-32-32-32-31-2C-32-32-32-31-2C-32-32-32-31-2C-32-32-32-31-2C-32-32-32-31-2C-32-32-32-31-2C-32-32-32-31-2C-32-32-32-31-2C-32-32-32-31-2C-32-32-32-31-2C-38-39-2C-32-32-32-31-2C-33-38-0D-0A-32-32-32-31-2C-32-32-32-31-2C-32-32-32-31-2C-32-32-32-31-2C-32-32-32-31-2C-32-32-32-31-2C-32-32-32-31-2C-32-32-32-31-2C-32-32
A	15:21:46.789	"221,2221,2221,2221,2221,89,2221,37
2221,2221,2221,2221,2221,2221,2221,2221,2221,2221,2221,2221,89,2221,38
2221,2221,2221,2221,2221,2221,2221,2221,22" received
I	15:21:46.790	Notification received from 6e400003-b5a3-f393-e0a9-e50e24dcca9e, value: (0x) 32-31-2C-32-32-32-31-2C-32-32-32-31-2C-32-32-32-31-2C-38-39-2C-32-32-32-31-2C-33-39-0D-0A-32-32-32-31-2C-32-32-32-31-2C-32-32-32-31-2C-32-32-32-31-2C-32-32-32-31-2C-32-32-32-31-2C-32-32-32-31-2C-32-32-32-31-2C-32-32-32-31-2C-32-32-32-31-2C-32-32-32-31-2C-32-32-32-31-2C-38-39-2C-32-32-32-31-2C-34-30-0D-0A-32-32-32-31-2C-32-32-32-31-2C-32-32-32-31-2C-32-32-32-31-2C-32-32-32-31-2C-32-32-32-31-2C-32-32-32-31-2C-32-32-32-31-2C-32-32-32-31-2C-32-32-32
A	15:21:46.790	"21,2221,2221,2221,89,2221,39
2221,2221,2221,2221,2221,2221,2221,2221,2221,2221,2221,2221,89,2221,40
2221,2221,2221,2221,2221,2221,2221,2221,2221,222" received
I	15:21:46.791	Notification received from 6e400003-b5a3-f393-e0a9-e50e24dcca9e, value: (0x) 31-2C-32-32-32-31-2C-32-32-32-31-2C-38-39-2C-32-32-32-31-2C-34-31-0D-0A-32-32-32-31-2C-32-32-32-31-2C-32-32-32-31-2C-32-32-32-31-2C-32-32-32-31-2C-32-32-32-31-2C-32-32-32-31-2C-32-32-32-31-2C-32-32-32-31-2C-32-32-32-31-2C-32-32-32-31-2C-32-32-32-31-2C-38-39-2C-32-32-32-31-2C-34-32-0D-0A-32-32-32-31-2C-32-32-32-31-2C-32-32-32-31-2C-32-32-32-31-2C-32-32-32-31-2C-32-32-32-31-2C-32-32-32-31-2C-32-32-32-31-2C-32-32-32-31-2C-32-32-32-31-2C-32-32-32-31
A	15:21:46.791	"1,2221,2221,89,2221,41
2221,2221,2221,2221,2221,2221,2221,2221,2221,2221,2221,2221,89,2221,42
2221,2221,2221,2221,2221,2221,2221,2221,2221,2221,2221" received
I	15:21:46.792	Notification received from 6e400003-b5a3-f393-e0a9-e50e24dcca9e, value: (0x) 2C-32-32-32-31-2C-38-39-2C-32-32-32-31-2C-34-33-0D-0A-32-32-32-31-2C-32-32-32-31-2C-32-32-32-31-2C-32-32-32-31-2C-32-32-32-31-2C-32-32-32-31-2C-32-32-32-31-2C-32-32-32-31-2C-32-32-32-31-2C-32-32-32-31-2C-32-32-32-31-2C-32-32-32-31-2C-38-39-2C-32-32-32-31-2C-34-34-0D-0A-32-32-32-31-2C-32-32-32-31-2C-32-32-32-31-2C-32-32-32-31-2C-32-32-32-31-2C-32-32-32-31-2C-32-32-32-31-2C-32-32-32-31-2C-32-32-32-31-2C-32-32-32-31-2C-32-32-32-31-2C-32-32-32-31-2C
A	15:21:46.792	",2221,89,2221,43
2221,2221,2221,2221,2221,2221,2221,2221,2221,2221,2221,2221,89,2221,44
2221,2221,2221,2221,2221,2221,2221,2221,2221,2221,2221,2221," received
I	15:21:46.793	Notification received from 6e400003-b5a3-f393-e0a9-e50e24dcca9e, value: (0x) 38-39-2C-32-32-32-31-2C-34-35-0D-0A-32-32-32-31-2C-32-32-32-31-2C-32-32-32-31-2C-32-32-32-31-2C-32-32-32-31-2C-32-32-32-31-2C-32-32-32-31-2C-32-32-32-31-2C-32-32-32-31-2C-32-32-32-31-2C-32-32-32-31-2C-32-32-32-31-2C-38-39-2C-32-32-32-31-2C-34-36-0D-0A-32-32-32-31-2C-32-32-32-31-2C-32-32-32-31-2C-32-32-32-31-2C-32-32-32-31-2C-32-32-32-31-2C-32-32-32-31-2C-32-32-32-31-2C-32-32-32-31-2C-32-32-32-31-2C-32-32-32-31-2C-32-32-32-31-2C-38-39-2C-32-32-32
A	15:21:46.793	"89,2221,45
2221,2221,2221,2221,2221,2221,2221,2221,2221,2221,2221,2221,89,2221,46
2221,2221,2221,2221,2221,2221,2221,2221,2221,2221,2221,2221,89,222" received
I	15:21:46.794	Notification received from 6e400003-b5a3-f393-e0a9-e50e24dcca9e, value: (0x) 31-2C-34-37-0D-0A-32-32-32-31-2C-32-32-32-31-2C-32-32-32-31-2C-32-32-32-31-2C-32-32-32-31-2C-32-32-32-31-2C-32-32-32-31-2C-32-32-32-31-2C-32-32-32-31-2C-32-32-32-31-2C-32-32-32-31-2C-32-32-32-31-2C-38-39-2C-32-32-32-31-2C-34-38-0D-0A-32-32-32-31-2C-32-32-32-31-2C-32-32-32-31-2C-32-32-32-31-2C-32-32-32-31-2C-32-32-32-31-2C-32-32-32-31-2C-32-32-32-31-2C-32-32-32-31-2C-32-32-32-31-2C-32-32-32-31-2C-32-32-32-31-2C-38-39-2C-32-32-32-31-2C-34-39-0D-0A
A	15:21:46.794	"1,47
2221,2221,2221,2221,2221,2221,2221,2221,2221,2221,2221,2221,89,2221,48
2221,2221,2221,2221,2221,2221,2221,2221,2221,2221,2221,2221,89,2221,49
" received
I	15:21:46.795	Notification received from 6e400003-b5a3-f393-e0a9-e50e24dcca9e, value: (0x) 32-32-32-31-2C-32-32-32-31-2C-32-32-32-31-2C-32-32-32-31-2C-32-32-32-31-2C-32-32-32-31-2C-32-32-32-31-2C-32-32-32-31-2C-32-32-32-31-2C-32-32-32-31-2C-32-32-32-31-2C-32-32-32-31-2C-38-39-2C-32-32-32-31-2C-35-30-0D-0A-32-32-32-31-2C-32-32-32-31-2C-32-32-32-31-2C-32-32-32-31-2C-32-32-32-31-2C-32-32-32-31-2C-32-32-32-31-2C-32-32-32-31-2C-32-32-32-31-2C-32-32-32-31-2C-32-32-32-31-2C-32-32-32-31-2C-38-39-2C-32-32-32-31-2C-35-31-0D-0A-32-32-32-31-2C-32
A	15:21:46.795	"2221,2221,2221,2221,2221,2221,2221,2221,2221,2221,2221,2221,89,2221,50
2221,2221,2221,2221,2221,2221,2221,2221,2221,2221,2221,2221,89,2221,51
2221,2" received
I	15:21:46.796	Notification received from 6e400003-b5a3-f393-e0a9-e50e24dcca9e, value: (0x) 32-32-31-2C-32-32-32-31-2C-32-32-32-31-2C-32-32-32-31-2C-32-32-32-31-2C-32-32-32-31-2C-32-32-32-31-2C-32-32-32-31-2C-32-32-32-31-2C-32-32-32-31-2C-32-32-32-31-2C-38-39-2C-32-32-32-31-2C-35-32-0D-0A-32-32-32-31-2C-32-32-32-31-2C-32-32-32-31-2C-32-32-32-31-2C-32-32-32-31-2C-32-32-32-31-2C-32-32-32-31-2C-32-32-32-31-2C-32-32-32-31-2C-32-32-32-31-2C-32-32-32-31-2C-32-32-32-31-2C-38-39-2C-32-32-32-31-2C-35-33-0D-0A-32-32-32-31-2C-32-32-32-31-2C-32-32
A	15:21:46.796	"221,2221,2221,2221,2221,2221,2221,2221,2221,2221,2221,89,2221,52
2221,2221,2221,2221,2221,2221,2221,2221,2221,2221,2221,2221,89,2221,53
2221,2221,22" received

these are logs of nrf connect while i am connecting with both nrf connect and nrf toolbox .

<info> app_timer: RTC: initialized.
<info> app: 0
<info> app: HRS_C_INIT
<info> app: BAS_C_INIT
<info> app: Heart Rate collector example started.
<info> app: Starting scan.
<info> app: 0
<info> app: peripheral Connected
<info> app: Data length for connection 0x1 updated to 251.
<info> app: Data length for connection 0x1 updated to 27.
<info> app: Data len is set to 0xF4(244)
<info> app: GATT ATT MTU on connection 0x1 changed to 247.
<info> app: Data length for connection 0x1 updated to 251.
<info> app: Initializing disk 0 (SDC)...
<info> app: Capacity: 1902 MB
<info> app: Mounting volume...
<info> app: 
 Listing directory: /
   <DIR>   SYSTEM~1        0  000041C6.TXT   223049  BOOK1C~1.XLS  1051955  GUIDEF~1.PDF  1377436  LATCH-~1.PDF   <DIR>   SALMAN  2906452  HRCOMP.CSV 33563537  ESTTT.CSV 69754908  TESTFILE.CSV 69754908  1.CSV  3145720  HR.CSV<info> app: tempting to set BLE_COMMON_CFG_VS_UUID.
<info> app: Writing to file hr.CSV...
<info> app: data size: 0 bytes
<info> app: File size: 3145720 bytes
<info> app: Scan timed out.
<info> app: Starting scan.
<info> app: 0
<info> app: 4667
<info> app: done
<info> app: Scan timed out.
<info> app: Starting scan.
<info> app: 0
<info> app: Scan timed out.
<info> app: Starting scan.
<info> app: 0
<info> app: Scan timed out.
<info> app: Starting scan.
<info> app: 0
<info> app: Data length for connection 0x1 updated to 251.
<info> app: Scan timed out.
<info> app: Starting scan.
<info> app: 0
<info> app: Scan timed out.
<info> app: Starting scan.
<info> app: 0
<info> app: Scan timed out.
<info> app: Starting scan.
<info> app: 0
<info> app: Scan timed out.
<info> app: Starting scan.
<info> app: 0
<info> app: Scan timed out.
<info> app: Starting scan.
<info> app: 0
<info> app: Disconnected
<info> app: Scan timed out.
<info> app: Starting scan.
<info> app: 0
<info> app: Scan timed out.
<info> app: Starting scan.
<info> app: 0
<info> app: Scan timed out.
<info> app: Starting scan.
<info> app: 0
<info> app: Scan timed out.
<info> app: Starting scan.
<info> app: 0
<info> app: Scan timed out.
<info> app: Starting scan.
<info> app: 0
<info> app: Scan timed out.
<info> app: Starting scan.
<info> app: 0
<info> app_timer: RTC: initialized.
<info> app: 0
<info> app: HRS_C_INIT
<info> app: BAS_C_INIT
<info> app: Heart Rate collector example started.
<info> app: Starting scan.
<info> app: 0

These are peripheral logs .

[quote userid="87869" url="~/f/nordic-q-a/80125/want-to-achieve-1-2-mbps-through-ble/335251#335251"]Could you detail exactly how you are calculating your achieved throughput, by the way?[/quote]

I am just sending data and calculate time my self and self calculating the throughput .

[quote userid="87869" url="~/f/nordic-q-a/80125/want-to-achieve-1-2-mbps-through-ble/335251#335251"]It could directly influence your throughput if you are only measuring the throughput of your main context, while in reality a lot of the throughput is lost to the UART handler. This is why I mention it. You should make sure that the UART is not receiving any data which it then queues for sending.[/quote]

No i am not sending any data to uart at the time .

RE: want to achieve 1-2 Mbps through BLE.

Karl Ylvisaker — Thu, 21 Oct 2021 10:12:43 GMT

[quote user="Mohsin khan"]When i try to see data while using both nrf connect and nrf toolbox then it shows me whole data but when i use alone nrf connect then this issue occurs . [/quote]

Please provide the logs for all these instances so I may take a look.
Please also include the peripheral's logs for these instances.

Could you detail exactly how you are calculating your achieved throughput, by the way?

[quote user="Mohsin khan"]

No i am not sending any data to UART , Its not using uart handler .

Btw that's less important . Important is throughput which is very low for my application .

[/quote]

It could directly influence your throughput if you are only measuring the throughput of your main context, while in reality a lot of the throughput is lost to the UART handler. This is why I mention it. You should make sure that the UART is not receiving any data which it then queues for sending.

Best regards,
Karl

RE: want to achieve 1-2 Mbps through BLE.

Mohsin khan — Thu, 21 Oct 2021 09:56:03 GMT

[quote userid="87869" url="~/f/nordic-q-a/80125/want-to-achieve-1-2-mbps-through-ble/335236#335236"]How do you know that you are sending 150 bytes and only receiving 17 of them?
Could you show me the logs from nRF Connect and the peripheral itself, when this happens?[/quote]

I receive all 150 in nrf toolbox app but not on nrf connect .

When i try to see data while using both nrf connect and nrf toolbox then it shows me whole data but when i use alone nrf connect then this issue occurs .

[quote userid="87869" url="~/f/nordic-q-a/80125/want-to-achieve-1-2-mbps-through-ble/335236#335236"]I notice that you are also calling ble_nus_data_send in your UART handler. Are you sending data to the UART at the same time as you are trying to transfer your sensor data?[/quote]

No i am not sending any data to UART , Its not using uart handler .

Btw that's less important . Important is throughput which is very low for my application .

Best regards ,

Mohsin khan

RE: want to achieve 1-2 Mbps through BLE.

Karl Ylvisaker — Thu, 21 Oct 2021 09:25:18 GMT

[quote user="Mohsin khan"]I am sending you logs you where asking please do check parameter . [/quote]

Great - the logs indicate that you are successfully using the 2M PHY.

[quote user="Mohsin khan"]I am just sending you some portion of logs as its not allowing me to send more than that . In that everything is clear like parameters . [/quote]

I do not think you are limited in the length of the inserted log, but if you would like to send the complete log you could do so by using the Insert -> File option instead.

[quote user="Mohsin khan"]As i was saying when i use nrf connect data is not collected complete , Its receiving just 17 bytes but i am sending 150 bytes[/quote]

How do you know that you are sending 150 bytes and only receiving 17 of them?
Could you show me the logs from nRF Connect and the peripheral itself, when this happens?

I notice that you are also calling ble_nus_data_send in your UART handler. Are you sending data to the UART at the same time as you are trying to transfer your sensor data?
The UART handler will have priority over the main context, so it will prioritize sending the UART data over the simulated data.

Best regards,
Karl

RE: want to achieve 1-2 Mbps through BLE.

Mohsin khan — Wed, 20 Oct 2021 10:04:28 GMT

[quote userid="87869" url="~/f/nordic-q-a/80125/want-to-achieve-1-2-mbps-through-ble/334406#334406"]Could you also confirm for me whether you are using the nRF Connect smartphone application or the nRF Toolbox application to communicate with your phone?[/quote]

I am using both on different time . As i was saying when i use nrf connect data is not collected complete , Its receiving just 17 bytes but i am sending 150 bytes , I am sending you logs you where asking please do check parameter .

- Heart Rate Control Point [W] (0x2A39)
Unknown Service (0000aaa0-0000-1000-8000-aabbccddeeff)
- Unknown Characteristic [N R] (0000aaa1-0000-1000-8000-aabbccddeeff)
   Client Characteristic Configuration (0x2902)
   Unknown Descriptor (0000aab0-0000-1000-8000-aabbccddeeff)
   Characteristic User Description (0x2901)
   Characteristic Presentation Format (0x2904)
- Unknown Characteristic [I W WNR] (0000aaa2-0000-1000-8000-aabbccddeeff)
   Client Characteristic Configuration (0x2902)
User Data (0x181C)
- First Name [R W] (0x2A8A)
- Last Name [R W] (0x2A90)
- Gender [R W] (0x2A8C)
V	12:48:52.851	Connecting to E0:F3:99:D1:24:FB...
D	12:48:52.851	gatt = device.connectGatt(autoConnect = false, TRANSPORT_LE, preferred PHY = LE 1M)
D	12:48:53.533	[Server callback] Connection state changed with status: 0 and new state: CONNECTED (2)
I	12:48:53.533	[Server] Device with address E0:F3:99:D1:24:FB connected
D	12:48:53.549	[Callback] Connection state changed with status: 0 and new state: CONNECTED (2)
I	12:48:53.549	Connected to E0:F3:99:D1:24:FB
D	12:48:53.571	[Broadcast] Action received: android.bluetooth.device.action.ACL_CONNECTED
V	12:48:53.582	Discovering services...
D	12:48:53.582	gatt.discoverServices()
I	12:48:53.978	Connection parameters updated (interval: 7.5ms, latency: 0, timeout: 5000ms)
I	12:48:54.109	[Server] PHY updated (TX: LE 2M, RX: LE 2M)
I	12:48:54.110	PHY updated (TX: LE 2M, RX: LE 2M)
D	12:48:54.358	[Callback] Services discovered with status: 0
I	12:48:54.358	Services discovered
V	12:48:54.373	Generic Access (0x1800)
- Device Name [R W] (0x2A00)
- Appearance [R] (0x2A01)
- Peripheral Preferred Connection Parameters [R] (0x2A04)
- Central Address Resolution [R] (0x2AA6)
Generic Attribute (0x1801)
Nordic UART Service (6e400001-b5a3-f393-e0a9-e50e24dcca9e)
- RX Characteristic [W WNR] (6e400002-b5a3-f393-e0a9-e50e24dcca9e)
- TX Characteristic [N] (6e400003-b5a3-f393-e0a9-e50e24dcca9e)
   Client Characteristic Configuration (0x2902)
D	12:48:54.373	gatt.setCharacteristicNotification(6e400003-b5a3-f393-e0a9-e50e24dcca9e, true)
I	12:48:54.425	Connection parameters updated (interval: 45.0ms, latency: 0, timeout: 5000ms)
V	12:48:55.715	Enabling notifications for 6e400003-b5a3-f393-e0a9-e50e24dcca9e
D	12:48:55.715	gatt.setCharacteristicNotification(6e400003-b5a3-f393-e0a9-e50e24dcca9e, true)
D	12:48:55.717	gatt.writeDescriptor(00002902-0000-1000-8000-00805f9b34fb, value=0x0100)
I	12:48:56.045	Data written to descr. 00002902-0000-1000-8000-00805f9b34fb, value: (0x) 01-00
A	12:48:56.045	"Notifications enabled" sent
V	12:48:56.052	Notifications enabled for 6e400003-b5a3-f393-e0a9-e50e24dcca9e
I	12:48:58.514	Connection parameters updated (interval: 50.0ms, latency: 0, timeout: 4000ms)
I	12:48:59.794	Notification received from 6e400003-b5a3-f393-e0a9-e50e24dcca9e, value: (0x) 0D-0A-32-32-32-31-2C-32-32-32-31-2C-32-32-32-31-2C-32-32-32
A	12:48:59.794	"
2221,2221,2221,222" received
I	12:48:59.819	Notification received from 6e400003-b5a3-f393-e0a9-e50e24dcca9e, value: (0x) 32-32-31-2C-32-32-32-31-2C-32-32-32-31-2C-32-32-32-31-2C-32, "221,2221,2221,2221,2"
A	12:48:59.819	"221,2221,2221,2221,2" received
I	12:48:59.823	Notification received from 6e400003-b5a3-f393-e0a9-e50e24dcca9e, value: (0x) 2C-32-32-32-31-2C-32-32-32-31-2C-32-32-32-31-2C-32-32-32-31, ",2221,2221,2221,2221"
A	12:48:59.823	",2221,2221,2221,2221" received
I	12:48:59.824	Notification received from 6e400003-b5a3-f393-e0a9-e50e24dcca9e, value: (0x) 32-31-2C-32-32-32-31-2C-32-32-32-31-2C-32-32-32-31-2C-32-32, "21,2221,2221,2221,22"
A	12:48:59.824	"21,2221,2221,2221,22" received
I	12:48:59.826	Notification received from 6e400003-b5a3-f393-e0a9-e50e24dcca9e, value: (0x) 32-32-32-31-2C-32-32-32-31-2C-32-32-32-31-2C-32-32-32-31-2C, "2221,2221,2221,2221,"
A	12:48:59.826	"2221,2221,2221,2221," received
I	12:48:59.969	Notification received from 6e400003-b5a3-f393-e0a9-e50e24dcca9e, value: (0x) 32-32-31-2C-32-32-32-31-2C-32-32-32-31-2C-32-32-32-31-2C-32, "221,2221,2221,2221,2"
A	12:48:59.969	"221,2221,2221,2221,2" received
I	12:48:59.970	Notification received from 6e400003-b5a3-f393-e0a9-e50e24dcca9e, value: (0x) 32-31-2C-32-32-32-31-2C-32-32-32-31-2C-32-32-32-31-2C-38-39, "21,2221,2221,2221,89"
A	12:48:59.971	"21,2221,2221,2221,89" received
I	12:48:59.973	Notification received from 6e400003-b5a3-f393-e0a9-e50e24dcca9e, value: (0x) 31-2C-32-32-32-31-2C-32-32-32-31-2C-38-39-2C-32-32-32-31-2C, "1,2221,2221,89,2221,"
A	12:48:59.973	"1,2221,2221,89,2221," received
I	12:48:59.976	Notification received from 6e400003-b5a3-f393-e0a9-e50e24dcca9e, value: (0x) 2C-32-32-32-31-2C-38-39-2C-32-32-32-31-2C-31-38-0D-0A-32-32
A	12:48:59.976	",2221,89,2221,18
22" received
I	12:48:59.977	Notification received from 6e400003-b5a3-f393-e0a9-e50e24dcca9e, value: (0x) 38-39-2C-32-32-32-31-2C-32-30-0D-0A-32-32-32-31-2C-32-32-32
A	12:48:59.977	"89,2221,20
2221,222" received
I	12:48:59.980	Notification received from 6e400003-b5a3-f393-e0a9-e50e24dcca9e, value: (0x) 31-2C-32-32-0D-0A-32-32-32-31-2C-32-32-32-31-2C-32-32-32-31
A	12:48:59.980	"1,22
2221,2221,2221" received
I	12:48:59.983	Notification received from 6e400003-b5a3-f393-e0a9-e50e24dcca9e, value: (0x) 32-32-32-31-2C-32-32-32-31-2C-32-32-32-31-2C-32-32-32-31-2C, "2221,2221,2221,2221,"
A	12:48:59.983	"2221,2221,2221,2221," received
I	12:48:59.984	Notification received from 6e400003-b5a3-f393-e0a9-e50e24dcca9e, value: (0x) 32-32-31-2C-32-32-32-31-2C-32-32-32-31-2C-32-32-32-31-2C-32, "221,2221,2221,2221,2"
A	12:48:59.984	"221,2221,2221,2221,2" received
I	12:48:59.986	Notification received from 6e400003-b5a3-f393-e0a9-e50e24dcca9e, value: (0x) 32-31-2C-32-32-32-31-2C-32-32-32-31-2C-32-32-32-31-2C-32-32, "21,2221,2221,2221,22"
A	12:48:59.986	"21,2221,2221,2221,22" received
I	12:48:59.987	Notification received from 6e400003-b5a3-f393-e0a9-e50e24dcca9e, value: (0x) 31-2C-32-32-32-31-2C-32-32-32-31-2C-32-32-32-31-2C-32-32-32, "1,2221,2221,2221,222"
A	12:48:59.987	"1,2221,2221,2221,222" received
I	12:48:59.988	Notification received from 6e400003-b5a3-f393-e0a9-e50e24dcca9e, value: (0x) 2C-32-32-32-31-2C-32-32-32-31-2C-32-32-32-31-2C-32-32-32-31, ",2221,2221,2221,2221"
A	12:48:59.988	",2221,2221,2221,2221" received
I	12:48:59.990	Notification received from 6e400003-b5a3-f393-e0a9-e50e24dcca9e, value: (0x) 32-32-32-31-2C-32-32-32-31-2C-32-32-32-31-2C-32-32-32-31-2C, "2221,2221,2221,2221,"
A	12:48:59.990	"2221,2221,2221,2221," received
I	12:48:59.992	Notification received from 6e400003-b5a3-f393-e0a9-e50e24dcca9e, value: (0x) 32-32-31-2C-32-32-32-31-2C-32-32-32-31-2C-32-32-32-31-2C-32, "221,2221,2221,2221,2"
A	12:48:59.992	"221,2221,2221,2221,2" received
I	12:48:59.993	Notification received from 6e400003-b5a3-f393-e0a9-e50e24dcca9e, value: (0x) 32-31-2C-32-32-32-31-2C-32-32-32-31-2C-32-32-32-31-2C-38-39, "21,2221,2221,2221,89"
A	12:48:59.993	"21,2221,2221,2221,89" received
I	12:48:59.995	Notification received from 6e400003-b5a3-f393-e0a9-e50e24dcca9e, value: (0x) 31-2C-32-32-32-31-2C-32-32-32-31-2C-38-39-2C-32-32-32-31-2C, "1,2221,2221,89,2221,"
A	12:48:59.995	"1,2221,2221,89,2221," received
I	12:48:59.998	Notification received from 6e400003-b5a3-f393-e0a9-e50e24dcca9e, value: (0x) 2C-32-32-32-31-2C-38-39-2C-32-32-32-31-2C-34-33-0D-0A-32-32
A	12:48:59.998	",2221,89,2221,43
22" received
I	12:48:59.998	Notification received from 6e400003-b5a3-f393-e0a9-e50e24dcca9e, value: (0x) 38-39-2C-32-32-32-31-2C-34-35-0D-0A-32-32-32-31-2C-32-32-32
A	12:48:59.998	"89,2221,45
2221,222" received
I	12:48:59.998	Notification received from 6e400003-b5a3-f393-e0a9-e50e24dcca9e, value: (0x) 31-2C-34-37-0D-0A-32-32-32-31-2C-32-32-32-31-2C-32-32-32-31
A	12:48:59.998	"1,47
2221,2221,2221" received
I	12:48:59.999	Notification received from 6e400003-b5a3-f393-e0a9-e50e24dcca9e, value: (0x) 32-32-32-31-2C-32-32-32-31-2C-32-32-32-31-2C-32-32-32-31-2C, "2221,2221,2221,2221,"
A	12:48:59.999	"2221,2221,2221,2221," received
I	12:49:00.005	Notification received from 6e400003-b5a3-f393-e0a9-e50e24dcca9e, value: (0x) 32-32-31-2C-32-32-32-31-2C-32-32-32-31-2C-32-32-32-31-2C-32, "221,2221,2221,2221,2"
A	12:49:00.005	"221,2221,2221,2221,2" received
I	12:49:00.005	Notification received from 6e400003-b5a3-f393-e0a9-e50e24dcca9e, value: (0x) 32-31-2C-32-32-32-31-2C-32-32-32-31-2C-32-32-32-31-2C-32-32, "21,2221,2221,2221,22"
A	12:49:00.005	"21,2221,2221,2221,22" received
I	12:49:00.005	Notification received from 6e400003-b5a3-f393-e0a9-e50e24dcca9e, value: (0x) 31-2C-32-32-32-31-2C-32-32-32-31-2C-32-32-32-31-2C-32-32-32, "1,2221,2221,2221,222"
A	12:49:00.005	"1,2221,2221,2221,222" received
I	12:49:00.005	Notification received from 6e400003-b5a3-f393-e0a9-e50e24dcca9e, value: (0x) 2C-32-32-32-31-2C-32-32-32-31-2C-32-32-32-31-2C-32-32-32-31, ",2221,2221,2221,2221"
A	12:49:00.005	",2221,2221,2221,2221" received
I	12:49:00.006	Notification received from 6e400003-b5a3-f393-e0a9-e50e24dcca9e, value: (0x) 32-32-32-31-2C-32-32-32-31-2C-32-32-32-31-2C-32-32-32-31-2C, "2221,2221,2221,2221,"
A	12:49:00.006	"2221,2221,2221,2221," received
I	12:49:00.006	Notification received from 6e400003-b5a3-f393-e0a9-e50e24dcca9e, value: (0x) 32-32-31-2C-32-32-32-31-2C-32-32-32-31-2C-32-32-32-31-2C-32, "221,2221,2221,2221,2"
A	12:49:00.006	"221,2221,2221,2221,2" received
I	12:49:00.009	Notification received from 6e400003-b5a3-f393-e0a9-e50e24dcca9e, value: (0x) 32-31-2C-32-32-32-31-2C-32-32-32-31-2C-32-32-32-31-2C-38-39, "21,2221,2221,2221,89"
A	12:49:00.009	"21,2221,2221,2221,89" received
I	12:49:00.009	Notification received from 6e400003-b5a3-f393-e0a9-e50e24dcca9e, value: (0x) 31-2C-32-32-32-31-2C-32-32-32-31-2C-38-39-2C-32-32-32-31-2C, "1,2221,2221,89,2221,"
A	12:49:00.009	"1,2221,2221,89,2221," received
I	12:49:00.010	Notification received from 6e400003-b5a3-f393-e0a9-e50e24dcca9e, value: (0x) 2C-32-32-32-31-2C-38-39-2C-32-32-32-31-2C-36-38-0D-0A-32-32
A	12:49:00.010	",2221,89,2221,68
22" received
I	12:49:00.010	Notification received from 6e400003-b5a3-f393-e0a9-e50e24dcca9e, value: (0x) 38-39-2C-32-32-32-31-2C-37-30-0D-0A-32-32-32-31-2C-32-32-32
A	12:49:00.010	"89,2221,70
2221,222" received
I	12:49:00.011	Notification received from 6e400003-b5a3-f393-e0a9-e50e24dcca9e, value: (0x) 31-2C-37-32-0D-0A-32-32-32-31-2C-32-32-32-31-2C-32-32-32-31
A	12:49:00.011	"1,72
2221,2221,2221" received
I	12:49:00.012	Notification received from 6e400003-b5a3-f393-e0a9-e50e24dcca9e, value: (0x) 32-32-32-31-2C-32-32-32-31-2C-32-32-32-31-2C-32-32-32-31-2C, "2221,2221,2221,2221,"
A	12:49:00.012	"2221,2221,2221,2221," received
I	12:49:00.012	Notification received from 6e400003-b5a3-f393-e0a9-e50e24dcca9e, value: (0x) 32-32-31-2C-32-32-32-31-2C-32-32-32-31-2C-32-32-32-31-2C-32, "221,2221,2221,2221,2"
A	12:49:00.012	"221,2221,2221,2221,2" received
I	12:49:00.015	Notification received from 6e400003-b5a3-f393-e0a9-e50e24dcca9e, value: (0x) 32-31-2C-32-32-32-31-2C-32-32-32-31-2C-32-32-32-31-2C-32-32, "21,2221,2221,2221,22"
A	12:49:00.016	"21,2221,2221,2221,22" received
I	12:49:00.017	Notification received from 6e400003-b5a3-f393-e0a9-e50e24dcca9e, value: (0x) 2C-32-32-32-31-2C-32-32-32-31-2C-32-32-32-31-2C-32-32-32-31, ",2221,2221,2221,2221"
A	12:49:00.017	",2221,2221,2221,2221" received
I	12:49:00.017	Notification received from 6e400003-b5a3-f393-e0a9-e50e24dcca9e, value: (0x) 32-32-32-31-2C-32-32-32-31-2C-32-32-32-31-2C-32-32-32-31-2C, "2221,2221,2221,2221,"
A	12:49:00.017	"2221,2221,2221,2221," received
I	12:49:00.017	Notification received from 6e400003-b5a3-f393-e0a9-e50e24dcca9e, value: (0x) 32-32-31-2C-32-32-32-31-2C-32-32-32-31-2C-32-32-32-31-2C-32, "221,2221,2221,2221,2"
A	12:49:00.017	"221,2221,2221,2221,2" received
I	12:49:00.017	Notification received from 6e400003-b5a3-f393-e0a9-e50e24dcca9e, value: (0x) 32-31-2C-32-32-32-31-2C-32-32-32-31-2C-32-32-32-31-2C-32-32, "21,2221,2221,2221,22"
A	12:49:00.017	"21,2221,2221,2221,22" received
I	12:49:00.018	Notification received from 6e400003-b5a3-f393-e0a9-e50e24dcca9e, value: (0x) 31-2C-32-32-32-31-2C-32-32-32-31-2C-32-32-32-31-2C-38-39-2C, "1,2221,2221,2221,89,"
A	12:49:00.018	"1,2221,2221,2221,89," received
I	12:49:00.019	Notification received from 6e400003-b5a3-f393-e0a9-e50e24dcca9e, value: (0x) 2C-32-32-32-31-2C-32-32-32-31-2C-38-39-2C-32-32-32-31-2C-39, ",2221,2221,89,2221,9"
A	12:49:00.019	",2221,2221,89,2221,9" received
I	12:49:00.019	Notification received from 6e400003-b5a3-f393-e0a9-e50e24dcca9e, value: (0x) 32-32-32-31-2C-38-39-2C-32-32-32-31-2C-39-33-0D-0A-32-32-32
A	12:49:00.019	"2221,89,2221,93
222" received
I	12:49:00.021	Notification received from 6e400003-b5a3-f393-e0a9-e50e24dcca9e, value: (0x) 39-2C-32-32-32-31-2C-39-35-0D-0A-32-32-32-31-2C-32-32-32-31
A	12:49:00.021	"9,2221,95
2221,2221" received
I	12:49:00.023	Notification received from 6e400003-b5a3-f393-e0a9-e50e24dcca9e, value: (0x) 2C-39-37-0D-0A-32-32-32-31-2C-32-32-32-31-2C-32-32-32-31-2C
A	12:49:00.023	",97
2221,2221,2221," received
I	12:49:00.023	Notification received from 6e400003-b5a3-f393-e0a9-e50e24dcca9e, value: (0x) 32-32-31-2C-32-32-32-31-2C-32-32-32-31-2C-32-32-32-31-2C-32, "221,2221,2221,2221,2"
A	12:49:00.023	"221,2221,2221,2221,2" received
I	12:49:00.024	Notification received from 6e400003-b5a3-f393-e0a9-e50e24dcca9e, value: (0x) 32-32-32-31-2C-32-32-32-31-2C-32-32-32-31-2C-32-32-32-31-2C, "2221,2221,2221,2221,"
A	12:49:00.024	"2221,2221,2221,2221," received
I	12:49:00.024	Notification received from 6e400003-b5a3-f393-e0a9-e50e24dcca9e, value: (0x) 2C-32-32-32-31-2C-32-32-32-31-2C-32-32-32-31-2C-32-32-32-31, ",2221,2221,2221,2221"
A	12:49:00.024	",2221,2221,2221,2221" received
I	12:49:00.025	Notification received from 6e400003-b5a3-f393-e0a9-e50e24dcca9e, value: (0x) 31-2C-32-32-32-31-2C-32-32-32-31-2C-32-32-32-31-2C-32-32-32, "1,2221,2221,2221,222"
A	12:49:00.025	"1,2221,2221,2221,222" received
I	12:49:00.026	Notification received from 6e400003-b5a3-f393-e0a9-e50e24dcca9e, value: (0x) 32-31-2C-32-32-32-31-2C-32-32-32-31-2C-32-32-32-31-2C-32-32, "21,2221,2221,2221,22"
A	12:49:00.026	"21,2221,2221,2221,22" received
I	12:49:00.026	Notification received from 6e400003-b5a3-f393-e0a9-e50e24dcca9e, value: (0x) 32-32-31-2C-32-32-32-31-2C-32-32-32-31-2C-32-32-32-31-2C-32, "221,2221,2221,2221,2"
A	12:49:00.026	"221,2221,2221,2221,2" received
I	12:49:00.027	Notification received from 6e400003-b5a3-f393-e0a9-e50e24dcca9e, value: (0x) 32-32-32-31-2C-32-32-32-31-2C-32-32-32-31-2C-32-32-32-31-2C, "2221,2221,2221,2221,"
A	12:49:00.027	"2221,2221,2221,2221," received
I	12:49:00.028	Notification received from 6e400003-b5a3-f393-e0a9-e50e24dcca9e, value: (0x) 2C-32-32-32-31-2C-32-32-32-31-2C-32-32-32-31-2C-32-32-32-31, ",2221,2221,2221,2221"
A	12:49:00.028	",2221,2221,2221,2221" received
I	12:49:00.029	Notification received from 6e400003-b5a3-f393-e0a9-e50e24dcca9e, value: (0x) 31-2C-32-32-32-31-2C-32-32-32-31-2C-32-32-32-31-2C-32-32-32, "1,2221,2221,2221,222"
A	12:49:00.029	"1,2221,2221,2221,222" received
I	12:49:00.030	Notification received from 6e400003-b5a3-f393-e0a9-e50e24dcca9e, value: (0x) 32-31-2C-32-32-32-31-2C-32-32-32-31-2C-32-32-32-31-2C-32-32, "21,2221,2221,2221,22"
A	12:49:00.030	"21,2221,2221,2221,22" received
I	12:49:00.030	Notification received from 6e400003-b5a3-f393-e0a9-e50e24dcca9e, value: (0x) 32-32-31-2C-32-32-32-31-2C-32-32-32-31-2C-32-32-32-31-2C-38, "221,2221,2221,2221,8"
A	12:49:00.030	"221,2221,2221,2221,8" received
I	12:49:00.031	Notification received from 6e400003-b5a3-f393-e0a9-e50e24dcca9e, value: (0x) 32-32-32-31-2C-32-32-32-31-2C-32-32-32-31-2C-38-39-2C-32-32, "2221,2221,2221,89,22"
A	12:49:00.031	"2221,2221,2221,89,22" received
I	12:49:00.032	Notification received from 6e400003-b5a3-f393-e0a9-e50e24dcca9e, value: (0x) 2C-32-32-32-31-2C-32-32-32-31-2C-38-39-2C-32-32-32-31-2C-31, ",2221,2221,89,2221,1"
A	12:49:00.032	",2221,2221,89,2221,1" received
I	12:49:00.034	Notification received from 6e400003-b5a3-f393-e0a9-e50e24dcca9e, value: (0x) 31-2C-32-32-32-31-2C-38-39-2C-32-32-32-31-2C-31-32-36-0D-0A
A	12:49:00.034	"1,2221,89,2221,126

I am just sending you some portion of logs as its not allowing me to send more than that . In that everything is clear like parameters .

[quote userid="87869" url="~/f/nordic-q-a/80125/want-to-achieve-1-2-mbps-through-ble/334406#334406"]
Do you have any possibility of getting a hold of a sniffer? This would greatly help our debugging cause to increase your throughput, since we would be able to see what the bottleneck is.[/quote]

The issue is i don't have that controller which can act as sniffer .

So i have changed my code , Now i am getting data from SD card CSV file and sending it through BLE .

I am pasting my code here so that you can guide me through . Main code is in fatfs_example() to do the BLE as i want to do .

/**
 * Copyright (c) 2014 - 2020, Nordic Semiconductor ASA
 *
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without modification,
 * are permitted provided that the following conditions are met:
 *
 * 1. Redistributions of source code must retain the above copyright notice, this
 *    list of conditions and the following disclaimer.
 *
 * 2. Redistributions in binary form, except as embedded into a Nordic
 *    Semiconductor ASA integrated circuit in a product or a software update for
 *    such product, must reproduce the above copyright notice, this list of
 *    conditions and the following disclaimer in the documentation and/or other
 *    materials provided with the distribution.
 *
 * 3. Neither the name of Nordic Semiconductor ASA nor the names of its
 *    contributors may be used to endorse or promote products derived from this
 *    software without specific prior written permission.
 *
 * 4. This software, with or without modification, must only be used with a
 *    Nordic Semiconductor ASA integrated circuit.
 *
 * 5. Any software provided in binary form under this license must not be reverse
 *    engineered, decompiled, modified and/or disassembled.
 *
 * THIS SOFTWARE IS PROVIDED BY NORDIC SEMICONDUCTOR ASA "AS IS" AND ANY EXPRESS
 * OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
 * OF MERCHANTABILITY, NONINFRINGEMENT, AND FITNESS FOR A PARTICULAR PURPOSE ARE
 * DISCLAIMED. IN NO EVENT SHALL NORDIC SEMICONDUCTOR ASA OR CONTRIBUTORS BE
 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE
 * GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
 * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 *
 */
/**
 * @brief BLE Heart Rate Collector application main file.
 *
 * This file contains the source code for a sample heart rate collector.
 */

#include <stdbool.h>
#include <stdint.h>
#include <stdio.h>
#include <string.h>

#include "bsp.h"
#include "diskio_blkdev.h"
#include "ff.h"
#include "nrf.h"
#include "nrf_block_dev_sdc.h"
#include "nrf_delay.h"
#include "nrf_drv_gpiote.h"
#include "nrf_drv_timer.h"

#include "app_uart.h"
#include "ble_advdata.h"
#include "ble_advertising.h"
#include "ble_conn_params.h"
#include "ble_nus.h"
#include "nrf_ble_qwr.h"
#include "ble_gatts.h"

#include "app_error.h"
#include "app_timer.h"
#include "app_util.h"
#include "ble.h"
#include "ble_bas_c.h"
#include "ble_conn_state.h"
#include "ble_db_discovery.h"
#include "ble_hci.h"
#include "ble_hrs_c.h"
#include "ble_srv_common.h"
#include "bsp_btn_ble.h"
#include "fds.h"
#include "nordic_common.h"
#include "nrf_ble_gatt.h"
#include "nrf_ble_lesc.h"
#include "nrf_ble_scan.h"
#include "nrf_fstorage.h"
#include "nrf_log.h"
#include "nrf_log_ctrl.h"
#include "nrf_log_default_backends.h"
#include "nrf_pwr_mgmt.h"
#include "nrf_sdh.h"
#include "nrf_sdh_ble.h"
#include "nrf_sdh_soc.h"
#include "nrf_sdm.h"
#include "peer_manager.h"
#include "peer_manager_handler.h"

#if defined(UART_PRESENT)
#include "nrf_uart.h"
#endif
#if defined(UARTE_PRESENT)
#include "nrf_uarte.h"
#endif

#define FILE_NAME "hr.CSV"
#define TEST_STRING "SD card example."

#define NUS_SERVICE_UUID_TYPE BLE_UUID_TYPE_VENDOR_BEGIN

#ifdef BSP_BUTTON_0
#define PIN_IN BSP_BUTTON_0
#endif
#ifndef PIN_IN
#error "Please indicate input pin"
#endif

#ifdef BSP_LED_1
#define PIN_OUT BSP_LED_1
#endif
#ifndef PIN_OUT
#error "Please indicate output pin"
#endif /**< Context for the Queued Write module.*/

BLE_ADVERTISING_DEF(m_advertising);
BLE_NUS_DEF(m_nus, 6);
NRF_BLE_QWRS_DEF(m_qwr, 6);
static ble_uuid_t m_adv_uuids[] = /**< Universally unique service identifier. */
    {
        {BLE_UUID_NUS_SERVICE, NUS_SERVICE_UUID_TYPE}};

#define APP_ADV_INTERVAL 64 /**< The advertising interval (in units of 0.625 ms. This value corresponds to 40 ms). */

#define APP_ADV_DURATION 18000

volatile uint8_t button_pressed = 0;

volatile int timer_call = 0;
FRESULT ff_result;
static FIL file;

uint16_t heart_rate;
char s_heartrate[4];
volatile uint8_t c;
uint32_t bytes_written;
const nrf_drv_timer_t TIMER_LED = NRF_DRV_TIMER_INSTANCE(1);
#define SDC_SCK_PIN ARDUINO_13_PIN  ///< SDC serial clock (SCK) pin.
#define SDC_MOSI_PIN ARDUINO_11_PIN ///< SDC serial data in (DI) pin.
#define SDC_MISO_PIN ARDUINO_12_PIN ///< SDC serial data out (DO) pin.
#define SDC_CS_PIN ARDUINO_10_PIN   ///< SDC chip select (CS) pin.

#define MIN_CONN_INTERVAL                    (uint16_t)(MSEC_TO_UNITS(50, UNIT_1_25_MS)) 
#define MAX_CONN_INTERVAL                    (uint16_t)(MSEC_TO_UNITS(50, UNIT_1_25_MS))    /**< Maximum acceptable connection interval (75 ms), Connection interval uses 1.25 ms units. */
#define SLAVE_LATENCY 0                                      /**< Slave latency. */
#define CONN_SUP_TIMEOUT MSEC_TO_UNITS(4000, UNIT_10_MS)     /**< Connection supervisory timeout (4 seconds), Supervision Timeout uses 10 ms units. */
#define FIRST_CONN_PARAMS_UPDATE_DELAY APP_TIMER_TICKS(5000) /**< Time from initiating event (connect or start of notification) to first time sd_ble_gap_conn_param_update is called (5 seconds). */
#define NEXT_CONN_PARAMS_UPDATE_DELAY APP_TIMER_TICKS(30000) /**< Time between each call to sd_ble_gap_conn_param_update after the first call (30 seconds). */
#define MAX_CONN_PARAMS_UPDATE_COUNT 3

#define DEVICE_NAME "nRF Relay"
static uint16_t m_ble_nus_max_data_len = BLE_GATT_ATT_MTU_DEFAULT ;
#define APP_BLE_CONN_CFG_TAG 1 /**< A tag identifying the SoftDevice BLE configuration. */

#define APP_BLE_OBSERVER_PRIO 3 /**< Application's BLE observer priority. You shouldn't need to modify this value. */
#define APP_SOC_OBSERVER_PRIO 1 /**< Applications' SoC observer priority. You shouldn't need to modify this value. */

#define LESC_DEBUG_MODE 0 /**< Set to 1 to use LESC debug keys, allows you to use a sniffer to inspect traffic. */

#define SEC_PARAM_BOND 1                               /**< Perform bonding. */
#define SEC_PARAM_MITM 0                               /**< Man In The Middle protection not required. */
#define SEC_PARAM_LESC 1                               /**< LE Secure Connections enabled. */
#define SEC_PARAM_KEYPRESS 0                           /**< Keypress notifications not enabled. */
#define SEC_PARAM_IO_CAPABILITIES BLE_GAP_IO_CAPS_NONE /**< No I/O capabilities. */
#define SEC_PARAM_OOB 0                                /**< Out Of Band data not available. */
#define SEC_PARAM_MIN_KEY_SIZE 7                       /**< Minimum encryption key size in octets. */
#define SEC_PARAM_MAX_KEY_SIZE 16                      /**< Maximum encryption key size in octets. */

#define SCAN_DURATION_WITELIST 3000 /**< Duration of the scanning in units of 10 milliseconds. */
#define HART_RATE_SERVICE_UUID_IDX 0
#define TARGET_UUID BLE_UUID_HEART_RATE_SERVICE                /**< Target device uuid that application is looking for. */
static uint16_t m_conn_handle_hrs_c = BLE_CONN_HANDLE_INVALID; /**< Connection handle for the HRS central application */
static uint16_t m_conn_handle_rscs_c = BLE_CONN_HANDLE_INVALID;
char init[] = "Long,Lat,Alt,Accelx,Accely,Accelz,GYROx,GYROy,GYROz,Magx,Magy,Magz,Heartrate,Bat %  ";
char data[] = "2221";

/**@brief Macro to unpack 16bit unsigned UUID from octet stream. */
#define UUID16_EXTRACT(DST, SRC) \
  do {                           \
    (*(DST)) = (SRC)[1];         \
    (*(DST)) <<= 8;              \
    (*(DST)) |= (SRC)[0];        \
  } while (0)

NRF_BLE_GQ_DEF(m_ble_gatt_queue, /**< BLE GATT Queue instance. */
    NRF_SDH_BLE_CENTRAL_LINK_COUNT,
    NRF_BLE_GQ_QUEUE_SIZE);

BLE_HRS_C_DEF(m_hrs_c);                   /**< Structure used to identify the heart rate client module. */
BLE_BAS_C_DEF(m_bas_c);                   /**< Structure used to identify the Battery Service client module. */
NRF_BLE_GATT_DEF(m_gatt);                 /**< GATT module instance. */
BLE_DB_DISCOVERY_ARRAY_DEF(m_db_disc, 2); /**< Database discovery module instances. */
NRF_BLE_SCAN_DEF(m_scan);                 /**< DB discovery module instance. */
                                          /**< Scanning module instance. */

static uint16_t m_conn_handle;           /**< Current connection handle. */
static bool m_whitelist_disabled;        /**< True if whitelist has been temporarily disabled. */
static bool m_memory_access_in_progress; /**< Flag to keep track of ongoing operations on persistent memory. */

void in_pin_handler(nrf_drv_gpiote_pin_t pin, nrf_gpiote_polarity_t action) {
  c = 1;
}

NRF_BLOCK_DEV_SDC_DEFINE(
    m_block_dev_sdc,
    NRF_BLOCK_DEV_SDC_CONFIG(
        SDC_SECTOR_SIZE,
        APP_SDCARD_CONFIG(SDC_MOSI_PIN, SDC_MISO_PIN, SDC_SCK_PIN, SDC_CS_PIN)),
    NFR_BLOCK_DEV_INFO_CONFIG("Nordic", "SDC", "1.00"));

void timer_led_event_handler(nrf_timer_event_t event_type, void *p_context) {
  switch (event_type) {
  case NRF_TIMER_EVENT_COMPARE0:
  timer_call = 1;
    break;

  default:
    //Do nothing.
    break;
  }
}

static void fatfs_example() {
ret_code_t err_code;
  static FATFS fs;
  static DIR dir;
  static FILINFO fno;

  DSTATUS disk_state = STA_NOINIT;

  // Initialize FATFS disk I/O interface by providing the block device.
  static diskio_blkdev_t drives[] =
      {
          DISKIO_BLOCKDEV_CONFIG(NRF_BLOCKDEV_BASE_ADDR(m_block_dev_sdc, block_dev), NULL)};

  diskio_blockdev_register(drives, ARRAY_SIZE(drives));

  NRF_LOG_INFO("Initializing disk 0 (SDC)...");
  for (uint32_t retries = 3; retries && disk_state; --retries) {
    disk_state = disk_initialize(0);
  }
  if (disk_state) {
    NRF_LOG_INFO("Disk initialization failed.");
    return;
  }

  uint32_t blocks_per_mb = (1024uL * 1024uL) / m_block_dev_sdc.block_dev.p_ops->geometry(&m_block_dev_sdc.block_dev)->blk_size;
  uint32_t capacity = m_block_dev_sdc.block_dev.p_ops->geometry(&m_block_dev_sdc.block_dev)->blk_count / blocks_per_mb;
  NRF_LOG_INFO("Capacity: %d MB", capacity);

  NRF_LOG_INFO("Mounting volume...");
  ff_result = f_mount(&fs, "", 1);
  if (ff_result) {
    NRF_LOG_INFO("Mount failed.");
    return;
  }

  NRF_LOG_INFO("\r\n Listing directory: /");
  ff_result = f_opendir(&dir, "/");
  if (ff_result) {
    NRF_LOG_INFO("Directory listing failed!");
    return;
  }

  do {
    ff_result = f_readdir(&dir, &fno);
    if (ff_result != FR_OK) {
      NRF_LOG_INFO("Directory read failed.");
      return;
    }

    if (fno.fname[0]) {
      if (fno.fattrib & AM_DIR) {
        NRF_LOG_RAW_INFO("   <DIR>   %s", (uint32_t)fno.fname);
      } else {
        NRF_LOG_RAW_INFO("%9lu  %s", fno.fsize, (uint32_t)fno.fname);
      }
    }
  } while (fno.fname[0]);
  NRF_LOG_RAW_INFO("");
  uint8_t string[15];
  NRF_LOG_INFO(string);
  NRF_LOG_INFO("Writing to file " FILE_NAME "...");
  ff_result = f_open(&file, FILE_NAME, FA_READ);
  if (ff_result != FR_OK) {
    NRF_LOG_INFO("Unable to open or create file: " FILE_NAME ".");
    return;
  }
  uint64_t size;
  size = f_size(&file);
   char * data = NULL;
        data = malloc(size); /* allocate memory to store image data */
        NRF_LOG_INFO("data size: %d bytes", data);
        NRF_LOG_INFO("File size: %d bytes", size);
        nrf_delay_ms(1000);
        int b=86;
        int counter=0;
        char string1[150];
    for(int a=1 ;a<700000;a=a+150)
    {
    counter++;
    //NRF_LOG_INFO("%d \n",a);
    //NRF_LOG_INFO("%d \n",b);
        f_lseek(&file,b);
    ff_result = f_read(&file, string1, 150, (UINT *) &bytes_written);
    if (ff_result != FR_OK)
    {
        NRF_LOG_INFO("read failed\r\n.");
    }
    else
    {
        //NRF_LOG_INFO("%d bytes read.", bytes_written);
    }
    NRF_LOG_HEXDUMP_DEBUG(string1, 0);
                    do
                    {

                    
                        uint16_t length = (uint16_t)150;
                        err_code = ble_nus_data_send(&m_nus, string1, &length, m_conn_handle);
                       
                        
                        
                        if ((err_code != NRF_ERROR_INVALID_STATE) &&
                            (err_code != NRF_ERROR_RESOURCES) &&
                            (err_code != NRF_ERROR_NOT_FOUND))
                        {
                          
                           APP_ERROR_CHECK(err_code);
                        }
                    } while (err_code == NRF_ERROR_RESOURCES);
    //for(int i=0;i<bytes_written;i++)
    //{
    //NRF_LOG_INFO("%d  ->  %c",i,string1[i]);
    //}
    b=b+150;
    
    }
    (void) f_close(&file);
    NRF_LOG_INFO("%d",counter);
    NRF_LOG_INFO("done");

  //ff_result = f_write(&file, string, sizeof(string), (UINT *) &bytes_written);
  //if (ff_result != FR_OK)
  //{
  //    NRF_LOG_INFO("Write failed\r\n.");
  //}
  //else
  //{
  //    NRF_LOG_INFO("%d bytes written.", bytes_written);
  //}

  //ff_result = f_write(&file, "\n",1,&bytes_written);
  //(void) f_close(&file);
  //for(int a=1 ; a<=600 ; a++)
  //{
  //for (int b=1 ;b<=14;b++)
  //{
  //ff_result = f_write(&file, data, sizeof(data), (UINT *) &bytes_written);
  //if (ff_result != FR_OK)
  //{
  //    NRF_LOG_INFO("Write failed\r\n.");
  //}
  //else
  //{
  //    NRF_LOG_INFO("%d bytes written.", bytes_written);
  //}
  //ff_result = f_write(&file, ",",1,&bytes_written);
  //}
  //ff_result = f_write(&file, "\n",1,&bytes_written);
  //nrf_delay_ms(60);
  //}
}
/**< Scan parameters requested for scanning and connection. */
static ble_gap_scan_params_t const m_scan_param =
    {
        .active = 0x01,
#if (NRF_SD_BLE_API_VERSION > 7)
        .interval_us = NRF_BLE_SCAN_SCAN_INTERVAL * UNIT_0_625_MS,
        .window_us = NRF_BLE_SCAN_SCAN_WINDOW * UNIT_0_625_MS,
#else
        .interval = NRF_BLE_SCAN_SCAN_INTERVAL,
        .window = NRF_BLE_SCAN_SCAN_WINDOW,
#endif
        .filter_policy = BLE_GAP_SCAN_FP_ACCEPT_ALL,
        .timeout = SCAN_DURATION_WITELIST,
        .scan_phys =  BLE_GAP_PHY_1MBPS ,
        .extended = true,

};

/**@brief Names which the central applications will scan for, and which will be advertised by the peripherals.
 *  if these are set to empty strings, the UUIDs defined below will be used
 */
static char const m_target_periph_name[] = ""; /**< If you want to connect to a peripheral using a given advertising name, type its name here. */
static bool is_connect_per_addr = true;        /**< If you want to connect to a peripheral with a given address, set this to true and put the correct address in the variable below. */

static ble_gap_addr_t const m_target_periph_addr =
    {
        /* Possible values for addr_type:
       BLE_GAP_ADDR_TYPE_PUBLIC,
       BLE_GAP_ADDR_TYPE_RANDOM_STATIC,
       BLE_GAP_ADDR_TYPE_RANDOM_PRIVATE_RESOLVABLE,
       BLE_GAP_ADDR_TYPE_RANDOM_PRIVATE_NON_RESOLVABLE. */
        .addr_type = BLE_GAP_ADDR_TYPE_RANDOM_STATIC,
        .addr = {0x8D, 0xFE, 0x23, 0x86, 0x77, 0xD9}};

static void scan_start(void);

/**@brief Function for asserts in the SoftDevice.
 *
 * @details This function will be called in case of an assert in the SoftDevice.
 *
 * @warning This handler is an example only and does not fit a final product. You need to analyze
 *          how your product is supposed to react in case of Assert.
 * @warning On assert from the SoftDevice, the system can only recover on reset.
 *
 * @param[in] line_num     Line number of the failing ASSERT call.
 * @param[in] p_file_name  File name of the failing ASSERT call.
 */
void assert_nrf_callback(uint16_t line_num, const uint8_t *p_file_name) {
  app_error_handler(0xDEADBEEF, line_num, p_file_name);
}

/**@brief Function for handling the Heart Rate Service Client and Battery Service Client errors.
 *
 * @param[in]   nrf_error   Error code containing information about what went wrong.
 */
static void service_error_handler(uint32_t nrf_error) {
  APP_ERROR_HANDLER(nrf_error);
}

/**@brief Function for handling database discovery events.
 *
 * @details This function is callback function to handle events from the database discovery module.
 *          Depending on the UUIDs that are discovered, this function should forward the events
 *          to their respective services.
 *
 * @param[in] p_event  Pointer to the database discovery event.
 */
static void db_disc_handler(ble_db_discovery_evt_t *p_evt) {
  ble_hrs_on_db_disc_evt(&m_hrs_c, p_evt);
  ble_bas_on_db_disc_evt(&m_bas_c, p_evt);
}

/**@brief Function for handling Peer Manager events.
 *
 * @param[in] p_evt  Peer Manager event.
 */

static void adv_scan_start(void) {
  ret_code_t err_code;

  //check if there are no flash operations in progress
  if (!nrf_fstorage_is_busy(NULL)) {
    // Start scanning for peripherals and initiate connection to devices which
    // advertise Heart Rate or Running speed and cadence UUIDs.
    scan_start();
    
    // Turn on the LED to signal scanning.
    bsp_board_led_on(BSP_BOARD_LED_0);

    // Start advertising.
    err_code = ble_advertising_start(&m_advertising, BLE_ADV_MODE_FAST);
    APP_ERROR_CHECK(err_code);
  }
}
static void pm_evt_handler(pm_evt_t const *p_evt) {
  pm_handler_on_pm_evt(p_evt);
  pm_handler_disconnect_on_sec_failure(p_evt);
  pm_handler_flash_clean(p_evt);

  switch (p_evt->evt_id) {
  case PM_EVT_PEERS_DELETE_SUCCEEDED:
    // Bonds are deleted. Start scanning.
    adv_scan_start();
    break;

  default:
    break;
  }
}

/**
 * @brief Function for shutdown events.
 *
 * @param[in]   event       Shutdown type.
 */
static bool shutdown_handler(nrf_pwr_mgmt_evt_t event) {
  ret_code_t err_code;

  err_code = bsp_indication_set(BSP_INDICATE_IDLE);
  APP_ERROR_CHECK(err_code);

  switch (event) {
  case NRF_PWR_MGMT_EVT_PREPARE_WAKEUP:
    // Prepare wakeup buttons.
    err_code = bsp_btn_ble_sleep_mode_prepare();
    APP_ERROR_CHECK(err_code);
    break;
  default:
    break;
  }

  return true;
}

NRF_PWR_MGMT_HANDLER_REGISTER(shutdown_handler, APP_SHUTDOWN_HANDLER_PRIORITY);

/**@brief Function for handling BLE events.
 *
 * @param[in]   p_ble_evt   Bluetooth stack event.
 * @param[in]   p_context   Unused.
 */
static void multi_qwr_conn_handle_assign(uint16_t conn_handle) {
  for (uint32_t i = 0; i < NRF_SDH_BLE_TOTAL_LINK_COUNT; i++) {
    if (m_qwr[i].conn_handle == BLE_CONN_HANDLE_INVALID) {
      ret_code_t err_code = nrf_ble_qwr_conn_handle_assign(&m_qwr[i], conn_handle);
      APP_ERROR_CHECK(err_code);
      break;
    }
  }
}
volatile uint8_t peristat=0;
static void on_ble_peripheral_evt(ble_evt_t const *p_ble_evt) {
  uint32_t err_code;

  switch (p_ble_evt->header.evt_id) {
  case BLE_GAP_EVT_CONNECTED:

    NRF_LOG_INFO("peripheral Connected");
    peristat=1;
    err_code = bsp_indication_set(BSP_INDICATE_CONNECTED);
    APP_ERROR_CHECK(err_code);
    ble_gap_phys_t const phys =
        {
        
            .rx_phys = BLE_GAP_PHY_2MBPS | BLE_GAP_PHY_1MBPS | BLE_GAP_PHY_CODED,
            .tx_phys = BLE_GAP_PHY_2MBPS | BLE_GAP_PHY_1MBPS | BLE_GAP_PHY_CODED,
        };
        
      
   err_code = sd_ble_gap_phy_update(p_ble_evt->evt.gap_evt.conn_handle, &phys);
   APP_ERROR_CHECK(err_code);

    m_conn_handle = p_ble_evt->evt.gap_evt.conn_handle;
    multi_qwr_conn_handle_assign(p_ble_evt->evt.gap_evt.conn_handle);
    APP_ERROR_CHECK(err_code);
    break;

  case BLE_GAP_EVT_DISCONNECTED:
    NRF_LOG_INFO("Disconnected");
    peristat=0;
    // LED indication will be changed when advertising starts.
    m_conn_handle = BLE_CONN_HANDLE_INVALID;
    break;

  case BLE_GAP_EVT_PHY_UPDATE_REQUEST: {
    NRF_LOG_DEBUG("PHY update request.");
    ble_gap_phys_t const phys =
        {
        
            .rx_phys = BLE_GAP_PHY_2MBPS | BLE_GAP_PHY_1MBPS | BLE_GAP_PHY_CODED,
            .tx_phys = BLE_GAP_PHY_2MBPS | BLE_GAP_PHY_1MBPS | BLE_GAP_PHY_CODED,
        };
        
      
    err_code = sd_ble_gap_phy_update(p_ble_evt->evt.gap_evt.conn_handle, &phys);
    APP_ERROR_CHECK(err_code);
  } break;

  case BLE_GAP_EVT_SEC_PARAMS_REQUEST:
    // Pairing not supported
    err_code = sd_ble_gap_sec_params_reply(m_conn_handle, BLE_GAP_SEC_STATUS_PAIRING_NOT_SUPP, NULL, NULL);
    APP_ERROR_CHECK(err_code);
    break;

  case BLE_GATTS_EVT_SYS_ATTR_MISSING:
    // No system attributes have been stored.
    err_code = sd_ble_gatts_sys_attr_set(m_conn_handle, NULL, 0, 0);
    APP_ERROR_CHECK(err_code);
    break;

  case BLE_GATTC_EVT_TIMEOUT:
    // Disconnect on GATT Client timeout event.
    err_code = sd_ble_gap_disconnect(p_ble_evt->evt.gattc_evt.conn_handle,
    BLE_HCI_REMOTE_USER_TERMINATED_CONNECTION);
    APP_ERROR_CHECK(err_code);
    break;

  case BLE_GATTS_EVT_TIMEOUT:
    // Disconnect on GATT Server timeout event.
    err_code = sd_ble_gap_disconnect(p_ble_evt->evt.gatts_evt.conn_handle,
        BLE_HCI_REMOTE_USER_TERMINATED_CONNECTION);
    APP_ERROR_CHECK(err_code);
    break;

  default:
    // No implementation needed.
    break;
  }
}

static void on_ble_central_evt(ble_evt_t const *p_ble_evt) {
  ret_code_t err_code;
  ble_gap_evt_t const *p_gap_evt = &p_ble_evt->evt.gap_evt;

  switch (p_ble_evt->header.evt_id) {
  // Upon connection, check which peripheral is connected (HR or RSC), initiate DB
  // discovery, update LEDs status, and resume scanning, if necessary.
  case BLE_GAP_EVT_CONNECTED: {
    NRF_LOG_INFO("Central connected");
    // If no Heart Rate sensor or RSC sensor is currently connected, try to find them on this peripheral.
    if ((m_conn_handle_hrs_c == BLE_CONN_HANDLE_INVALID) || (m_conn_handle_rscs_c == BLE_CONN_HANDLE_INVALID)) {
      NRF_LOG_INFO("Attempt to find HRS or RSC on conn_handle 0x%x", p_gap_evt->conn_handle);

      err_code = ble_db_discovery_start(&m_db_disc[0], p_gap_evt->conn_handle);
      if (err_code == NRF_ERROR_BUSY) {
        err_code = ble_db_discovery_start(&m_db_disc[1], p_gap_evt->conn_handle);
        APP_ERROR_CHECK(err_code);
      } else {
        APP_ERROR_CHECK(err_code);
      }
    }

    // Assign connection handle to the QWR module.
    multi_qwr_conn_handle_assign(p_gap_evt->conn_handle);

    // Update LEDs status, and check whether to look for more peripherals to connect to.
    bsp_board_led_on(BSP_BOARD_LED_1);
    if (ble_conn_state_central_conn_count() == NRF_SDH_BLE_CENTRAL_LINK_COUNT) {
      bsp_board_led_off(BSP_BOARD_LED_0);
    } else {
      // Resume scanning.
      bsp_board_led_on(BSP_BOARD_LED_0);
      scan_start();
    }
  } break; // BLE_GAP_EVT_CONNECTED

  // Upon disconnection, reset the connection handle of the peer that disconnected,
  // update the LEDs status and start scanning again.
  case BLE_GAP_EVT_DISCONNECTED: {
    if (p_gap_evt->conn_handle == m_conn_handle_hrs_c) {
      NRF_LOG_INFO("HRS central disconnected (reason: %d)",
          p_gap_evt->params.disconnected.reason);

      m_conn_handle_hrs_c = BLE_CONN_HANDLE_INVALID;

      err_code = nrf_ble_scan_filter_set(&m_scan,
          SCAN_UUID_FILTER,
          &m_adv_uuids[HART_RATE_SERVICE_UUID_IDX]);
      APP_ERROR_CHECK(err_code);
      
    }

    if ((m_conn_handle_rscs_c == BLE_CONN_HANDLE_INVALID) || (m_conn_handle_hrs_c == BLE_CONN_HANDLE_INVALID)) {
      // Start scanning.
      scan_start();

      // Update LEDs status.
      bsp_board_led_on(BSP_BOARD_LED_0);
    }

    if (ble_conn_state_central_conn_count() == 0) {
      bsp_board_led_off(BSP_BOARD_LED_1);
    }
  } break; // BLE_GAP_EVT_DISCONNECTED

  case BLE_GAP_EVT_TIMEOUT: {
    // No timeout for scanning is specified, so only connection attemps can timeout.
    if (p_gap_evt->params.timeout.src == BLE_GAP_TIMEOUT_SRC_CONN) {
      NRF_LOG_INFO("Connection Request timed out.");
    }
  } break;

  case BLE_GAP_EVT_CONN_PARAM_UPDATE_REQUEST: {
    // Accept parameters requested by peer.
    err_code = sd_ble_gap_conn_param_update(p_gap_evt->conn_handle,
        &p_gap_evt->params.conn_param_update_request.conn_params);
    APP_ERROR_CHECK(err_code);
  } break;

  case BLE_GAP_EVT_PHY_UPDATE_REQUEST: {
    NRF_LOG_DEBUG("PHY update request.");
    ble_gap_phys_t const phys =
        {
            .rx_phys = BLE_GAP_PHY_2MBPS | BLE_GAP_PHY_1MBPS | BLE_GAP_PHY_CODED,
            .tx_phys = BLE_GAP_PHY_2MBPS | BLE_GAP_PHY_1MBPS | BLE_GAP_PHY_CODED,
        };
    err_code = sd_ble_gap_phy_update(p_ble_evt->evt.gap_evt.conn_handle, &phys);
    APP_ERROR_CHECK(err_code);
  } break;

  case BLE_GATTC_EVT_TIMEOUT:
    // Disconnect on GATT Client timeout event.
    NRF_LOG_DEBUG("GATT Client Timeout.");
    err_code = sd_ble_gap_disconnect(p_ble_evt->evt.gattc_evt.conn_handle,
        BLE_HCI_REMOTE_USER_TERMINATED_CONNECTION);
    APP_ERROR_CHECK(err_code);
    break;

  case BLE_GATTS_EVT_TIMEOUT:
    // Disconnect on GATT Server timeout event.
    NRF_LOG_DEBUG("GATT Server Timeout.");
    err_code = sd_ble_gap_disconnect(p_ble_evt->evt.gatts_evt.conn_handle,
        BLE_HCI_REMOTE_USER_TERMINATED_CONNECTION);
    APP_ERROR_CHECK(err_code);
    break;

  default:
    // No implementation needed.
    break;
  }
}

/**@brief   Function for handling BLE events from peripheral applications.
 * @details Updates the status LEDs used to report the activity of the peripheral applications.
 *
 * @param[in]   p_ble_evt   Bluetooth stack event.
 */

static bool ble_evt_is_advertising_timeout(ble_evt_t const *p_ble_evt) {
  return (p_ble_evt->header.evt_id == BLE_GAP_EVT_ADV_SET_TERMINATED);
}
static void ble_evt_handler(ble_evt_t const *p_ble_evt, void *p_context) {
  uint16_t conn_handle = p_ble_evt->evt.gap_evt.conn_handle;
  uint16_t role = ble_conn_state_role(conn_handle);

  // Based on the role this device plays in the connection, dispatch to the right handler.
  if (role == BLE_GAP_ROLE_PERIPH || ble_evt_is_advertising_timeout(p_ble_evt)) {
    //ble_hrs_on_ble_evt(p_ble_evt, &m_hrs);
    ble_nus_on_ble_evt(p_ble_evt, &m_nus);
    on_ble_peripheral_evt(p_ble_evt);
  } else if ((role == BLE_GAP_ROLE_CENTRAL) || (p_ble_evt->header.evt_id == BLE_GAP_EVT_ADV_REPORT)) {
    ble_hrs_c_on_ble_evt(p_ble_evt, &m_hrs_c);
    //ble_nus_on_ble_evt(p_ble_evt,&m_nus);
    on_ble_central_evt(p_ble_evt);
  }
}

/**@brief SoftDevice SoC event handler.
 *
 * @param[in]   evt_id      SoC event.
 * @param[in]   p_context   Context.
 */
static void soc_evt_handler(uint32_t evt_id, void *p_context) {
  switch (evt_id) {
  case NRF_EVT_FLASH_OPERATION_SUCCESS:
    /* fall through */
  case NRF_EVT_FLASH_OPERATION_ERROR:

    if (m_memory_access_in_progress) {
      m_memory_access_in_progress = false;
      scan_start();
    }
    break;

  default:
    // No implementation needed.
    break;
  }
}
/**@brief Function for initializing the BLE stack.
 *
 * @details Initializes the SoftDevice and the BLE event interrupt.
 */
static void ble_stack_init(void) {
  ret_code_t err_code;

  err_code = nrf_sdh_enable_request();
  APP_ERROR_CHECK(err_code);

  // Configure the BLE stack using the default settings.
  // Fetch the start address of the application RAM.
  uint32_t ram_start = 0;
  err_code = nrf_sdh_ble_default_cfg_set(APP_BLE_CONN_CFG_TAG, &ram_start);
  APP_ERROR_CHECK(err_code);

  // Enable BLE stack.
  err_code = nrf_sdh_ble_enable(&ram_start);
  NRF_LOG_INFO("%d", err_code);
  APP_ERROR_CHECK(err_code);

  // Register handlers for BLE and SoC events.
  NRF_SDH_BLE_OBSERVER(m_ble_observer, APP_BLE_OBSERVER_PRIO, ble_evt_handler, NULL);
  NRF_SDH_SOC_OBSERVER(m_soc_observer, APP_SOC_OBSERVER_PRIO, soc_evt_handler, NULL);
}

/**@brief Function for the Peer Manager initialization.
 */
static void peer_manager_init(void) {
  ble_gap_sec_params_t sec_param;
  ret_code_t err_code;

  err_code = pm_init();
  APP_ERROR_CHECK(err_code);

  memset(&sec_param, 0, sizeof(ble_gap_sec_params_t));

  // Security parameters to be used for all security procedures.
  sec_param.bond = SEC_PARAM_BOND;
  sec_param.mitm = SEC_PARAM_MITM;
  sec_param.lesc = SEC_PARAM_LESC;
  sec_param.keypress = SEC_PARAM_KEYPRESS;
  sec_param.io_caps = SEC_PARAM_IO_CAPABILITIES;
  sec_param.oob = SEC_PARAM_OOB;
  sec_param.min_key_size = SEC_PARAM_MIN_KEY_SIZE;
  sec_param.max_key_size = SEC_PARAM_MAX_KEY_SIZE;
  sec_param.kdist_own.enc = 1;
  sec_param.kdist_own.id = 1;
  sec_param.kdist_peer.enc = 1;
  sec_param.kdist_peer.id = 1;

  err_code = pm_sec_params_set(&sec_param);
  APP_ERROR_CHECK(err_code);

  err_code = pm_register(pm_evt_handler);
  APP_ERROR_CHECK(err_code);
}

/** @brief Clear bonding information from persistent storage
 */
static void delete_bonds(void) {
  ret_code_t err_code;

  NRF_LOG_INFO("Erase bonds!");

  err_code = pm_peers_delete();
  APP_ERROR_CHECK(err_code);
}

/**@brief Function for disabling the use of whitelist for scanning.
 */
static void whitelist_disable(void) {
  if (!m_whitelist_disabled) {
    NRF_LOG_INFO("Whitelist temporarily disabled.");
    m_whitelist_disabled = true;
    nrf_ble_scan_stop();
    scan_start();
  }
}

/**@brief Function for handling events from the BSP module.
 *
 * @param[in]   event   Event generated by button press.
 */
void bsp_event_handler(bsp_event_t event) {
  ret_code_t err_code;

  switch (event) {
  case BSP_EVENT_SLEEP:
    nrf_pwr_mgmt_shutdown(NRF_PWR_MGMT_SHUTDOWN_GOTO_SYSOFF);
    break;

  case BSP_EVENT_DISCONNECT:
    err_code = sd_ble_gap_disconnect(m_conn_handle, BLE_HCI_REMOTE_USER_TERMINATED_CONNECTION);
    if (err_code != NRF_ERROR_INVALID_STATE) {
      APP_ERROR_CHECK(err_code);
    }
    break;

  case BSP_EVENT_WHITELIST_OFF:
    whitelist_disable();
    break;

  default:
    break;
  }
}

/**@brief Heart Rate Collector Handler.
 */
static void hrs_c_evt_handler(ble_hrs_c_t *p_hrs_c, ble_hrs_c_evt_t *p_hrs_c_evt) {
  NRF_LOG_INFO("hrs_c_evt_handler");
  ret_code_t err_code;

  switch (p_hrs_c_evt->evt_type) {
  case BLE_HRS_C_EVT_DISCOVERY_COMPLETE: {
    NRF_LOG_DEBUG("Heart rate service discovered.");

    err_code = ble_hrs_c_handles_assign(p_hrs_c,
        p_hrs_c_evt->conn_handle,
        &p_hrs_c_evt->params.peer_db);
    APP_ERROR_CHECK(err_code);

    // Initiate bonding.
    err_code = pm_conn_secure(p_hrs_c_evt->conn_handle, false);
    if (err_code != NRF_ERROR_BUSY) {
      APP_ERROR_CHECK(err_code);
    }

    // Heart rate service discovered. Enable notification of Heart Rate Measurement.
    err_code = ble_hrs_c_hrm_notif_enable(p_hrs_c);
    APP_ERROR_CHECK(err_code);
  } break;

  case BLE_HRS_C_EVT_HRM_NOTIFICATION: {
    NRF_LOG_INFO("Heart Rate = %d.", p_hrs_c_evt->params.hrm.hr_value);
    heart_rate = p_hrs_c_evt->params.hrm.hr_value;

    if (p_hrs_c_evt->params.hrm.rr_intervals_cnt != 0) {
      uint32_t rr_avg = 0;
      for (uint32_t i = 0; i < p_hrs_c_evt->params.hrm.rr_intervals_cnt; i++) {
        rr_avg += p_hrs_c_evt->params.hrm.rr_intervals[i];
      }
      rr_avg = rr_avg / p_hrs_c_evt->params.hrm.rr_intervals_cnt;
      NRF_LOG_DEBUG("rr_interval (avg) = %d.", rr_avg);
    }
  } break;

  default:
    break;
  }
}

/**@brief Battery level Collector Handler.
 */
static void bas_c_evt_handler(ble_bas_c_t *p_bas_c, ble_bas_c_evt_t *p_bas_c_evt) {
  NRF_LOG_INFO("bas_c_evt_handler");
  ret_code_t err_code;

  switch (p_bas_c_evt->evt_type) {
  case BLE_BAS_C_EVT_DISCOVERY_COMPLETE: {
    err_code = ble_bas_c_handles_assign(p_bas_c,
        p_bas_c_evt->conn_handle,
        &p_bas_c_evt->params.bas_db);
    APP_ERROR_CHECK(err_code);

    // Battery service discovered. Enable notification of Battery Level.
    NRF_LOG_DEBUG("Battery Service discovered. Reading battery level.");

    err_code = ble_bas_c_bl_read(p_bas_c);
    APP_ERROR_CHECK(err_code);

    NRF_LOG_DEBUG("Enabling Battery Level Notification.");
    err_code = ble_bas_c_bl_notif_enable(p_bas_c);
    APP_ERROR_CHECK(err_code);

  } break;

  case BLE_BAS_C_EVT_BATT_NOTIFICATION:
    NRF_LOG_INFO("Battery Level received %d %%.", p_bas_c_evt->params.battery_level);
    break;

  case BLE_BAS_C_EVT_BATT_READ_RESP:
    NRF_LOG_INFO("Battery Level Read as %d %%.", p_bas_c_evt->params.battery_level);
    break;

  default:
    break;
  }
}

/**
 * @brief Heart rate collector initialization.
 */
static void hrs_c_init(void) {
  NRF_LOG_INFO("HRS_C_INIT");
  ble_hrs_c_init_t hrs_c_init_obj;

  hrs_c_init_obj.evt_handler = hrs_c_evt_handler;
  hrs_c_init_obj.error_handler = service_error_handler;
  hrs_c_init_obj.p_gatt_queue = &m_ble_gatt_queue;

  ret_code_t err_code = ble_hrs_c_init(&m_hrs_c, &hrs_c_init_obj);
  APP_ERROR_CHECK(err_code);
}

/**
 * @brief Battery level collector initialization.
 */
static void bas_c_init(void) {
  NRF_LOG_INFO("BAS_C_INIT");
  ble_bas_c_init_t bas_c_init_obj;

  bas_c_init_obj.evt_handler = bas_c_evt_handler;
  bas_c_init_obj.error_handler = service_error_handler;
  bas_c_init_obj.p_gatt_queue = &m_ble_gatt_queue;

  ret_code_t err_code = ble_bas_c_init(&m_bas_c, &bas_c_init_obj);
  APP_ERROR_CHECK(err_code);
}

/**
 * @brief Database discovery collector initialization.
 */
static void db_discovery_init(void) {
  ble_db_discovery_init_t db_init;

  memset(&db_init, 0, sizeof(db_init));

  db_init.evt_handler = db_disc_handler;
  db_init.p_gatt_queue = &m_ble_gatt_queue;

  ret_code_t err_code = ble_db_discovery_init(&db_init);

  APP_ERROR_CHECK(err_code);
}

/**@brief Retrieve a list of peer manager peer IDs.
 *
 * @param[inout] p_peers   The buffer where to store the list of peer IDs.
 * @param[inout] p_size    In: The size of the @p p_peers buffer.
 *                         Out: The number of peers copied in the buffer.
 */
static void peer_list_get(pm_peer_id_t *p_peers, uint32_t *p_size) {
  pm_peer_id_t peer_id;
  uint32_t peers_to_copy;

  peers_to_copy = (*p_size < BLE_GAP_WHITELIST_ADDR_MAX_COUNT) ? *p_size : BLE_GAP_WHITELIST_ADDR_MAX_COUNT;

  peer_id = pm_next_peer_id_get(PM_PEER_ID_INVALID);
  *p_size = 0;

  while ((peer_id != PM_PEER_ID_INVALID) && (peers_to_copy--)) {
    p_peers[(*p_size)++] = peer_id;
    peer_id = pm_next_peer_id_get(peer_id);
  }
}

/**@brief Function to start scanning.
 */
static void scan_start(void) {
  ret_code_t err_code;

  if (nrf_fstorage_is_busy(NULL)) {
    m_memory_access_in_progress = true;
    return;
  }

  NRF_LOG_INFO("Starting scan.");

  err_code = nrf_ble_scan_start(&m_scan);
  APP_ERROR_CHECK(err_code);

  err_code = bsp_indication_set(BSP_INDICATE_SCANNING);
  NRF_LOG_INFO("%d", err_code);
  APP_ERROR_CHECK(err_code);
}

/**@brief Function for initializing buttons and leds.
 *
 * @param[out] p_erase_bonds  Will be true if the clear bonding button was pressed to wake the application up.
 */
static void buttons_leds_init(bool *p_erase_bonds) {
  ret_code_t err_code;
  bsp_event_t startup_event;

  err_code = bsp_init(BSP_INIT_LEDS | BSP_INIT_BUTTONS, bsp_event_handler);
  APP_ERROR_CHECK(err_code);

  err_code = bsp_btn_ble_init(NULL, &startup_event);
  APP_ERROR_CHECK(err_code);

  *p_erase_bonds = (startup_event == BSP_EVENT_CLEAR_BONDING_DATA);
}

/**@brief Function for initializing the nrf log module.
 */
static void log_init(void) {
  ret_code_t err_code = NRF_LOG_INIT(NULL);
  APP_ERROR_CHECK(err_code);

  NRF_LOG_DEFAULT_BACKENDS_INIT();
}

/**@brief Function for initializing the power management module. */
static void power_management_init(void) {
  ret_code_t err_code;
  err_code = nrf_pwr_mgmt_init();
  APP_ERROR_CHECK(err_code);
}

/**@brief GATT module event handler.
 */
static void gatt_evt_handler(nrf_ble_gatt_t *p_gatt, nrf_ble_gatt_evt_t const *p_evt) {

  if ((m_conn_handle == p_evt->conn_handle) && (p_evt->evt_id == NRF_BLE_GATT_EVT_ATT_MTU_UPDATED)) {
    m_ble_nus_max_data_len = p_evt->params.att_mtu_effective - OPCODE_LENGTH - HANDLE_LENGTH;
    NRF_LOG_INFO("Data len is set to 0x%X(%d)", m_ble_nus_max_data_len, m_ble_nus_max_data_len);
  }
  NRF_LOG_DEBUG("ATT MTU exchange completed. central 0x%x peripheral 0x%x",
      p_gatt->att_mtu_desired_central,
      p_gatt->att_mtu_desired_periph);
  switch (p_evt->evt_id) {
  case NRF_BLE_GATT_EVT_ATT_MTU_UPDATED: {
    NRF_LOG_INFO("GATT ATT MTU on connection 0x%x changed to %d.",
        p_evt->conn_handle,
        p_evt->params.att_mtu_effective);
  } break;

  case NRF_BLE_GATT_EVT_DATA_LENGTH_UPDATED: {
    NRF_LOG_INFO("Data length for connection 0x%x updated to %d.",
        p_evt->conn_handle,
        p_evt->params.data_length);
  } break;

  default:
    break;
  }
}
static void whitelist_load()
{
    ret_code_t   ret;
    pm_peer_id_t peers[8];
    uint32_t     peer_cnt;

    memset(peers, PM_PEER_ID_INVALID, sizeof(peers));
    peer_cnt = (sizeof(peers) / sizeof(pm_peer_id_t));

    // Load all peers from flash and whitelist them.
    peer_list_get(peers, &peer_cnt);

    ret = pm_whitelist_set(peers, peer_cnt);
    APP_ERROR_CHECK(ret);

    // Setup the device identies list.
    // Some SoftDevices do not support this feature.
    ret = pm_device_identities_list_set(peers, peer_cnt);
    if (ret != NRF_ERROR_NOT_SUPPORTED)
    {
        APP_ERROR_CHECK(ret);
    }
}
static void on_whitelist_req(void)
{
    ret_code_t err_code;

    // Whitelist buffers.
    ble_gap_addr_t whitelist_addrs[8];
    ble_gap_irk_t  whitelist_irks[8];

    memset(whitelist_addrs, 0x00, sizeof(whitelist_addrs));
    memset(whitelist_irks,  0x00, sizeof(whitelist_irks));

    uint32_t addr_cnt = (sizeof(whitelist_addrs) / sizeof(ble_gap_addr_t));
    uint32_t irk_cnt  = (sizeof(whitelist_irks)  / sizeof(ble_gap_irk_t));

    // Reload the whitelist and whitelist all peers.
    whitelist_load();

    // Get the whitelist previously set using pm_whitelist_set().
    err_code = pm_whitelist_get(whitelist_addrs, &addr_cnt,
                                whitelist_irks,  &irk_cnt);

    if (((addr_cnt == 0) && (irk_cnt == 0)) ||
        (m_whitelist_disabled))
    {
        // Don't use whitelist.
        err_code = nrf_ble_scan_params_set(&m_scan, NULL);
        APP_ERROR_CHECK(err_code);
    }
}
static void scan_evt_handler(scan_evt_t const *p_scan_evt) {
  ret_code_t err_code;
    switch(p_scan_evt->scan_evt_id)
    {
        case NRF_BLE_SCAN_EVT_WHITELIST_REQUEST:
        {
            on_whitelist_req();
            m_whitelist_disabled = false;
        } break;

        case NRF_BLE_SCAN_EVT_CONNECTING_ERROR:
        {
            err_code = p_scan_evt->params.connecting_err.err_code;
            APP_ERROR_CHECK(err_code);
        } break;

        case NRF_BLE_SCAN_EVT_SCAN_TIMEOUT:
        {
            NRF_LOG_INFO("Scan timed out.");
            scan_start();
        } break;

        case NRF_BLE_SCAN_EVT_FILTER_MATCH:
            break;
        case NRF_BLE_SCAN_EVT_WHITELIST_ADV_REPORT:
            break;

        default:
          break;
    }
}

/**@brief Function for initializing the timer.
 */
static void timer_init(void) {
  ret_code_t err_code = app_timer_init();
  APP_ERROR_CHECK(err_code);
}

/**@brief Function for initializing the GATT module.
 */
static void gatt_init(void) {
  ret_code_t err_code = nrf_ble_gatt_init(&m_gatt, gatt_evt_handler);
  APP_ERROR_CHECK(err_code);

  err_code = nrf_ble_gatt_att_mtu_periph_set(&m_gatt, NRF_SDH_BLE_GATT_MAX_MTU_SIZE);
  APP_ERROR_CHECK(err_code);
  err_code = nrf_ble_gatt_data_length_set(&m_gatt, BLE_CONN_HANDLE_INVALID , NRF_SDH_BLE_GAP_DATA_LENGTH);
  APP_ERROR_CHECK(err_code);

}

/**@brief Function for initialization scanning and setting filters.
 */
static void scan_init(void) {
  ret_code_t err_code;
  nrf_ble_scan_init_t init_scan;

  memset(&init_scan, 0, sizeof(init_scan));

  init_scan.p_scan_param = &m_scan_param;
  init_scan.connect_if_match = true;
  init_scan.conn_cfg_tag = APP_BLE_CONN_CFG_TAG;

  err_code = nrf_ble_scan_init(&m_scan, &init_scan, scan_evt_handler);
  APP_ERROR_CHECK(err_code);

  ble_uuid_t uuid =
      {
          .uuid = TARGET_UUID,
          .type = BLE_UUID_TYPE_BLE,
      };

  err_code = nrf_ble_scan_filter_set(&m_scan,
      SCAN_UUID_FILTER,
      &uuid);
  APP_ERROR_CHECK(err_code);

  if (strlen(m_target_periph_name) != 0) {
    err_code = nrf_ble_scan_filter_set(&m_scan,
        SCAN_NAME_FILTER,
        m_target_periph_name);
    APP_ERROR_CHECK(err_code);
  }

  if (is_connect_per_addr) {
    err_code = nrf_ble_scan_filter_set(&m_scan,
        SCAN_ADDR_FILTER,
        m_target_periph_addr.addr);
    APP_ERROR_CHECK(err_code);
  }

  err_code = nrf_ble_scan_filters_enable(&m_scan,
      NRF_BLE_SCAN_ALL_FILTER,
      false);
  APP_ERROR_CHECK(err_code);
}

/**@brief Function for handling the idle state (main loop).
 *
 * @details Handle any pending log operation(s), then sleep until the next event occurs.
 */
static void idle_state_handle(void) {
  ret_code_t err_code;

  err_code = nrf_ble_lesc_request_handler();
  APP_ERROR_CHECK(err_code);

  NRF_LOG_FLUSH();
  nrf_pwr_mgmt_run();
}

/**@brief Function for starting a scan, or instead trigger it from peer manager (after
 *        deleting bonds).
 *
 * @param[in] p_erase_bonds Pointer to a bool to determine if bonds will be deleted before scanning.
 */
void scanning_start(bool *p_erase_bonds) {
  // Start scanning for peripherals and initiate connection
  // with devices that advertise GATT Service UUID.
  if (*p_erase_bonds == true) {
    // Scan is started by the PM_EVT_PEERS_DELETE_SUCCEEDED event.
    delete_bonds();
  } else {
    scan_start();
  }
}

static void gpio_init(void) {
  ret_code_t err_code;
  NRF_LOG_INFO("INIT gpio");

  nrf_drv_gpiote_out_config_t out_config = GPIOTE_CONFIG_OUT_SIMPLE(false);

  err_code = nrf_drv_gpiote_out_init(PIN_OUT, &out_config);
  APP_ERROR_CHECK(err_code);

  nrf_drv_gpiote_in_event_enable(PIN_IN, true);
}

static void gap_params_init(void) {
  ret_code_t err_code;
  ble_gap_conn_params_t gap_conn_params;
  ble_gap_conn_sec_mode_t sec_mode;

  BLE_GAP_CONN_SEC_MODE_SET_OPEN(&sec_mode);

  err_code = sd_ble_gap_device_name_set(&sec_mode,
      (const uint8_t *)DEVICE_NAME,
      strlen(DEVICE_NAME));
  APP_ERROR_CHECK(err_code);

  memset(&gap_conn_params, 0, sizeof(gap_conn_params));

  gap_conn_params.min_conn_interval = MIN_CONN_INTERVAL;
  gap_conn_params.max_conn_interval = MAX_CONN_INTERVAL;
  gap_conn_params.slave_latency = SLAVE_LATENCY;
  gap_conn_params.conn_sup_timeout = CONN_SUP_TIMEOUT;

  err_code = sd_ble_gap_ppcp_set(&gap_conn_params);
  APP_ERROR_CHECK(err_code);
}
static void on_conn_params_evt(ble_conn_params_evt_t *p_evt) {
  uint32_t err_code;

  if (p_evt->evt_type == BLE_CONN_PARAMS_EVT_FAILED) {
    err_code = sd_ble_gap_disconnect(m_conn_handle, BLE_HCI_CONN_INTERVAL_UNACCEPTABLE);
    APP_ERROR_CHECK(err_code);
  }
}

static void conn_params_error_handler(uint32_t nrf_error) {
  APP_ERROR_HANDLER(nrf_error);
}

static void conn_params_init(void) {
  uint32_t err_code;
  ble_conn_params_init_t cp_init;

  memset(&cp_init, 0, sizeof(cp_init));

  cp_init.p_conn_params = NULL;
  cp_init.first_conn_params_update_delay = FIRST_CONN_PARAMS_UPDATE_DELAY;
  cp_init.next_conn_params_update_delay = NEXT_CONN_PARAMS_UPDATE_DELAY;
  cp_init.max_conn_params_update_count = MAX_CONN_PARAMS_UPDATE_COUNT;
  cp_init.start_on_notify_cccd_handle = BLE_GATT_HANDLE_INVALID;
  cp_init.disconnect_on_fail = false;
  cp_init.evt_handler = on_conn_params_evt;
  cp_init.error_handler = conn_params_error_handler;

  err_code = ble_conn_params_init(&cp_init);
  APP_ERROR_CHECK(err_code);
}

void uart_event_handle(app_uart_evt_t *p_event) {
  static uint8_t data_array[BLE_NUS_MAX_DATA_LEN];
  static uint8_t index = 0;
  uint32_t err_code;

  switch (p_event->evt_type) {
  case APP_UART_DATA_READY:
    NRF_LOG_INFO("uart event handle");
    UNUSED_VARIABLE(app_uart_get(&data_array[index]));
    index++;

    if ((data_array[index - 1] == '\n') ||
        (data_array[index - 1] == '\r') ||
        (index >= m_ble_nus_max_data_len)) {
      if (index > 1) {
        NRF_LOG_INFO("uart send handle");
        NRF_LOG_DEBUG("Ready to send data over BLE NUS");
        NRF_LOG_HEXDUMP_DEBUG(data_array, index);

        do {
          uint16_t length = (uint16_t)index;
          err_code = ble_nus_data_send(&m_nus, data_array, &length, m_conn_handle);
          NRF_LOG_INFO("%d", err_code);

          if ((err_code != NRF_ERROR_INVALID_STATE) &&
              (err_code != NRF_ERROR_RESOURCES) &&
              (err_code != NRF_ERROR_NOT_FOUND)) {
            APP_ERROR_CHECK(err_code);
          }
        } while (err_code == NRF_ERROR_RESOURCES);
      }

      index = 0;
    }
    break;

  case APP_UART_COMMUNICATION_ERROR:
    APP_ERROR_HANDLER(p_event->data.error_communication);
    break;

  case APP_UART_FIFO_ERROR:
    APP_ERROR_HANDLER(p_event->data.error_code);
    break;

  default:
    break;
  }
}
/**@snippet [Handling the data received over UART] */

#define UART_TX_BUF_SIZE 256 /**< UART TX buffer size. */
#define UART_RX_BUF_SIZE 256
/**@brief  Function for initializing the UART module.
 */
/**@snippet [UART Initialization] */
static void uart_init(void) {
  uint32_t err_code;
  app_uart_comm_params_t const comm_params =
  {
    .rx_pin_no = RX_PIN_NUMBER,
    .tx_pin_no = TX_PIN_NUMBER,
    .rts_pin_no = RTS_PIN_NUMBER,
    .cts_pin_no = CTS_PIN_NUMBER,
    .flow_control = APP_UART_FLOW_CONTROL_DISABLED,
    .use_parity = false,
#if defined(UART_PRESENT)
    .baud_rate = NRF_UART_BAUDRATE_115200
#else
    .baud_rate = NRF_UARTE_BAUDRATE_115200
#endif
  };

  APP_UART_FIFO_INIT(&comm_params,
      UART_RX_BUF_SIZE,
      UART_TX_BUF_SIZE,
      uart_event_handle,
      APP_IRQ_PRIORITY_LOWEST,
      err_code);
  APP_ERROR_CHECK(err_code);
}
static void nrf_qwr_error_handler(uint32_t nrf_error) {
  APP_ERROR_HANDLER(nrf_error);
}
static void nus_data_handler(ble_nus_evt_t *p_evt) {

  if (p_evt->type == BLE_NUS_EVT_RX_DATA) {
    uint32_t err_code;
    nrf_delay_ms(10);
    NRF_LOG_DEBUG("Received data from BLE NUS. Writing data on UART.");
    NRF_LOG_INFO("rom BLE NUS. ");
    NRF_LOG_HEXDUMP_DEBUG(p_evt->params.rx_data.p_data, p_evt->params.rx_data.length);

    for (uint32_t i = 0; i < p_evt->params.rx_data.length; i++) {
      NRF_LOG_INFO("1 ");
      do {
        err_code = app_uart_put(p_evt->params.rx_data.p_data[i]);
        if ((err_code != NRF_SUCCESS) && (err_code != NRF_ERROR_BUSY)) {
          NRF_LOG_ERROR("Failed receiving NUS message. Error 0x%x. ", err_code);
          APP_ERROR_CHECK(err_code);
        }
      } while (err_code == NRF_ERROR_BUSY);
    }
    if (p_evt->params.rx_data.p_data[p_evt->params.rx_data.length - 1] == '\r') {
      while (app_uart_put('\n') == NRF_ERROR_BUSY)
        ;
    }
  }
}
static void sleep_mode_enter(void) {
  uint32_t err_code = bsp_indication_set(BSP_INDICATE_IDLE);
  APP_ERROR_CHECK(err_code);

  // Prepare wakeup buttons.
  err_code = bsp_btn_ble_sleep_mode_prepare();
  APP_ERROR_CHECK(err_code);

  // Go to system-off mode (this function will not return; wakeup will cause a reset).
  err_code = sd_power_system_off();
  APP_ERROR_CHECK(err_code);
}
static void services_init(void) {
  uint32_t err_code;
  ble_nus_init_t nus_init;
  nrf_ble_qwr_init_t qwr_init = {0};

  // Initialize Queued Write Module.
  qwr_init.error_handler = nrf_qwr_error_handler;

  for (uint32_t i = 0; i < NRF_SDH_BLE_TOTAL_LINK_COUNT; i++) {
    err_code = nrf_ble_qwr_init(&m_qwr[i], &qwr_init);
    APP_ERROR_CHECK(err_code);
  }

  // Initialize NUS.
  memset(&nus_init, 0, sizeof(nus_init));

  nus_init.data_handler = nus_data_handler;

  err_code = ble_nus_init(&m_nus, &nus_init);
  APP_ERROR_CHECK(err_code);
}
static void on_adv_evt(ble_adv_evt_t ble_adv_evt) {
  uint32_t err_code;

  switch (ble_adv_evt) {
  case BLE_ADV_EVT_FAST:
    err_code = bsp_indication_set(BSP_INDICATE_ADVERTISING);
    APP_ERROR_CHECK(err_code);
    break;
  case BLE_ADV_EVT_IDLE:
    sleep_mode_enter();
    break;
  default:
    break;
  }
}

static void advertising_init(void) {
  uint32_t err_code;
  ble_advertising_init_t init;

  memset(&init, 0, sizeof(init));

  init.advdata.name_type = BLE_ADVDATA_FULL_NAME;
  init.advdata.include_appearance = false;
  init.advdata.flags = BLE_GAP_ADV_FLAGS_LE_ONLY_LIMITED_DISC_MODE;

  init.srdata.uuids_complete.uuid_cnt = sizeof(m_adv_uuids) / sizeof(m_adv_uuids[0]);
  init.srdata.uuids_complete.p_uuids = m_adv_uuids;

  init.config.ble_adv_fast_enabled = true;
  init.config.ble_adv_fast_interval = APP_ADV_INTERVAL;
  init.config.ble_adv_fast_timeout = APP_ADV_DURATION;
  init.evt_handler = on_adv_evt;

  err_code = ble_advertising_init(&m_advertising, &init);
  APP_ERROR_CHECK(err_code);

  ble_advertising_conn_cfg_tag_set(&m_advertising, APP_BLE_CONN_CFG_TAG);
}

static void advertising_start(void) {
  uint32_t err_code = ble_advertising_start(&m_advertising, BLE_ADV_MODE_FAST);
  APP_ERROR_CHECK(err_code);
}


int main(void) {

  bool erase_bonds;
  uint32_t time_ms = 1; //Time(in miliseconds) between consecutive compare events.
  uint32_t time_ticks;
  
  uint8_t gyrox=0;
  uint8_t gyroy=1;
  uint8_t gyroz=2;
  uint8_t accelx=3,accely=4,accelz=5;
  uint8_t magx=2,magy=2,magz=2;
  uint16_t counter=0;
  uint8_t lat=6,lon=7,alt=8;
  static uint8_t data_array2[150];
  

  uint32_t err_code = NRF_SUCCESS;
  uart_init();
  log_init();

  timer_init();
  power_management_init();
  buttons_leds_init(&erase_bonds);
  ble_stack_init();
  gatt_init();
  peer_manager_init();
  db_discovery_init();
  hrs_c_init();
  bas_c_init();
  scan_init();
  gap_params_init();
  services_init();
  advertising_init();
  conn_params_init();
  //nrf_drv_timer_config_t timer_cfg = NRF_DRV_TIMER_DEFAULT_CONFIG;
  //err_code = nrf_drv_timer_init(&TIMER_LED, &timer_cfg, timer_led_event_handler);
  //APP_ERROR_CHECK(err_code);
  //time_ticks = nrf_drv_timer_ms_to_ticks(&TIMER_LED, time_ms);
  //nrf_drv_timer_extended_compare(&TIMER_LED, NRF_TIMER_CC_CHANNEL0, time_ticks, NRF_TIMER_SHORT_COMPARE0_CLEAR_MASK, true);
  //nrf_drv_timer_enable(&TIMER_LED);
  //gpio_init();
  
  
  
  NRF_LOG_INFO("Heart Rate collector example started.");

  // fatfs_example();

  int store_data=1;
  int first_row = 1;
  int peristat2;
  if (erase_bonds == true) {
    // Scanning and advertising is done upon PM_EVT_PEERS_DELETE_SUCCEEDED event.
    delete_bonds();
  } else {
    adv_scan_start();
  }
  nrf_delay_ms(9000);
  // Enter main loop.
  for (;;) {
    //idle_state_handle();
    if(peristat2==1)
    {
    //NRF_LOG_INFO("START");
     if(counter<8000)
        {
        
                   //if(BLE_GATTS_EVT_SYS_ATTR_MISSING)
                   //{
                   //err_code = sd_ble_gatts_sys_attr_set(m_conn_handle, NULL, 0,0);
                   //APP_ERROR_CHECK(err_code);
                   //}

                    NRF_LOG_INFO("%d",counter);
                    sprintf(data_array2,"{\"g_x\":%d,\"g_y\":%d,\"g_z\":%d,\"a_x\":%d,\"a_y\":%d,\"a_z\":%d,\"m_x\":%d,\"m_y\":%d,\"m_z\":%d,\"lat\":%d,\"lon\":%d,\"alt\":%d,\"hb\":%d}",gyrox,gyroy,gyroz,accelx,accely,accelz,magx,magy,magz,lat,lon,alt,heart_rate);
                    //NRF_LOG_INFO("%d",strlen(data_array2));
                    NRF_LOG_DEBUG("Ready to send data over BLE NUS");
                    NRF_LOG_HEXDUMP_DEBUG(data_array2, 0);
                    do
                    {

                    
                        uint16_t length = (uint16_t)150;
                        err_code = ble_nus_data_send(&m_nus, data_array2, &length, m_conn_handle);
                       
                        
                        
                        if ((err_code != NRF_ERROR_INVALID_STATE) &&
                            (err_code != NRF_ERROR_RESOURCES) &&
                            (err_code != NRF_ERROR_NOT_FOUND))
                        {
                          
                           APP_ERROR_CHECK(err_code);
                        }
                    } while (err_code == NRF_ERROR_RESOURCES);
                    
                      gyrox++;
                      gyroy++;
                      gyroz++;
                      accelx++;
                      accely++;
                      accelz++;
                      magx++;
                      magy++;
                      magz++;
                      counter++;
                      lon++;
                      lat++;
                      alt++;
                      }timer_call=0;
                      
    
    
    }
    else if(store_data==1)
    {
    if(peristat==1)
    {
    fatfs_example();
    store_data=0;
    }
    }



}

  
}
//while(1)
  //{

  //if(button_pressed)
  //{

  //if(timer_call==1)
  //{
  ////write code
  //ff_result = f_open(&file, FILE_NAME, FA_READ | FA_WRITE | FA_OPEN_APPEND);
  //if (ff_result != FR_OK)
  //{
  //    NRF_LOG_INFO("Unable to open or create file: " FILE_NAME ".");
  //}
  //if(first_row==1)
  //{
  //ff_result = f_write(&file, init , sizeof(init), (UINT *) &bytes_written);
  //if (ff_result != FR_OK)
  //{
  //    NRF_LOG_INFO("read failed\r\n.");
  //}
  //ff_result = f_write(&file, "\n",1,&bytes_written);
  //first_row=0;
  //}
  // for (int b=1 ;b<=14;b++)
  //{
  //if(b==13)
  //{
  //itoa(heart_rate,s_heartrate,10);
  //ff_result = f_write(&file, s_heartrate, sizeof(s_heartrate), (UINT *) &bytes_written);
  //}
  //else
  //{
  //ff_result = f_write(&file, data, sizeof(data), (UINT *) &bytes_written);

  //if (ff_result != FR_OK)
  //{
  //    NRF_LOG_INFO("Write failed\r\n.");
  //}
  //else
  //{
  //   // NRF_LOG_INFO("%d bytes written.", bytes_written);
  //}
  //}
  //ff_result = f_write(&file, ",",1,&bytes_written);
  //}
  //ff_result = f_write(&file, "\n",1,&bytes_written);
  //timer_call=0;
  //(void) f_close(&file);
  ////nrf_delay_ms(100);
  //}

  //   //idle_state_handle();
  //   //bsp_board_led_invert(3);v
  //}
  //}// if(button_pressed)

  // uint32_t time_ms = 100; //Time(in miliseconds) between consecutive compare events.
  //uint32_t time_ticks ;
  // uint32_t err_code = NRF_SUCCESS;
  //bsp_board_init(BSP_INIT_LEDS);
  // uint32_t time_ms2 ;

  // nrf_drv_timer_config_t timer_cfg = NRF_DRV_TIMER_DEFAULT_CONFIG;

  // NRF_LOG_INFO("FATFS example started.");

  // fatfs_example();

  // err_code = nrf_drv_timer_init(&TIMER_LED, &timer_cfg, timer_led_event_handler);
  // APP_ERROR_CHECK(err_code);

RE: want to achieve 1-2 Mbps through BLE.

Karl Ylvisaker — Fri, 15 Oct 2021 15:41:42 GMT

Hello,

[quote user="Mohsin khan"]No i am connecting nus peripheral with my mobile phone .[/quote]

Could you also confirm for me whether you are using the nRF Connect smartphone application or the nRF Toolbox application to communicate with your phone?
I would recommend that you use the nRF Connect application. Could you share the entire connection log from nRF Connect with me? Please share it as a text and not a screenshot. I would like to confirm that everything looks as it should with the connection parameters and notification frequency.

[quote user="Mohsin khan"]It means my code is like incrementing every value last some data has been missed some data in between missed as i receive 162 number after i receive 198 so many notification missed on nrf toolbox . [/quote]

If the notifications are arriving out of order it is a application logic issue - the hvn buffer is FIFO, so that would mean they are input to the buffer in non-sequential order.

[quote user="Mohsin khan"]

I am receiving just

\"g_x\":%d,\"g_y\":%d part as i have sent you picture .

[/quote]

It seems to me that you are receiving all the expected numbers? The picture you sent contains 13 values in each notification, which seems to be exactly what you intended to receive? Furthermore, I notice that you are transmitting a lot of useless characters like "g_x:", etc. To increase your throughput you should only transfer meaningful characters, and slice off all static characters. You can add formatting on the reception side of the link separately.

[quote user="Mohsin khan"]and when i open both then i receive everything but throughput is just 41kBps . Previously i have told you less throughput but now my throughput is 41 kBps but i want to achieve more . [/quote]

Yes, while 328 kbps is an improvement, it is still far off from the 1300 kbps mark.
Did you implement the logic I described earlier that would ensure that you would always keep the hvn queue full of notifications?
It also seems to me that you are using 1M PHY still - you shared your scan parameters, which indicate that you're still scanning and connecting on 1 M PHY, which I assume means you're also advertising on 1 M PHY, and I do not see that you are updating the PHY to 2 M anywhere in your code either.

Do you have any possibility of getting a hold of a sniffer? This would greatly help our debugging cause to increase your throughput, since we would be able to see what the bottleneck is.

Best regards,
Karl

RE: want to achieve 1-2 Mbps through BLE.

Mohsin khan — Wed, 13 Oct 2021 12:06:56 GMT

Waiting for your response .

RE: want to achieve 1-2 Mbps through BLE.

Mohsin khan — Wed, 13 Oct 2021 06:07:19 GMT

So these are logs from nrf toolbox , I am simply incrementing the data but many notification got missed as you can see after 67 i received 71 and after 71 i received 76 . and 1 thing i want to clear is its with same data rate means 41kBps .

RE: want to achieve 1-2 Mbps through BLE.

Mohsin khan — Tue, 12 Oct 2021 13:45:12 GMT

[quote userid="87869" url="~/f/nordic-q-a/80125/want-to-achieve-1-2-mbps-through-ble/333751#333751"]Are you connecting two centrals to the same peripheral?[/quote]

No i am connecting nus peripheral with my mobile phone .

[quote userid="87869" url="~/f/nordic-q-a/80125/want-to-achieve-1-2-mbps-through-ble/333751#333751"]What do you mean when you say that data is missed - is there a sudden gap in the increments? Please show a log of this if possible.[/quote]

It means my code is like incrementing every value last some data has been missed some data in between missed as i receive 162 number after i receive 198 so many notification missed on nrf toolbox .

[quote userid="87869" url="~/f/nordic-q-a/80125/want-to-achieve-1-2-mbps-through-ble/333751#333751"]Please elaborate on what you mean when you say not whole data and good data rate. Is the throughput only good for a limited time?[/quote]

That means as i have complete string

{\"g_x\":%d,\"g_y\":%d,\"g_z\":%d,\"a_x\":%d,\"a_y\":%d,\"a_z\":%d,\"m_x\":%d,\"m_y\":%d,\"m_z\":%d,\"lat\":%d,\"lon\":%d,\"alt\":%d,\"hb\":%d}",gyrox,gyroy,gyroz,accelx,accely,accelz,magx,magy,magz,lat,lon,alt,heart_rate);

I am receiving just

\"g_x\":%d,\"g_y\":%d part as i have sent you picture .

That's on nrf connect .

and when i open both then i receive everything but throughput is just 41kBps . Previously i have told you less throughput but now my throughput is 41 kBps but i want to achieve more .

RE: want to achieve 1-2 Mbps through BLE.

Karl Ylvisaker — Tue, 12 Oct 2021 13:30:44 GMT

[quote user="Mohsin khan"]So here is situation when i try to connect through nrf toolbox and want to see data on logs some of notification missed but when i use nrf connect and nrf toolbox on same time , Whole data received .[/quote]

Are you connecting two centrals to the same peripheral?
What do you mean when you say that data is missed - is there a sudden gap in the increments? Please show a log of this if possible.
Please elaborate thoroughly, so I may better understand what you are testing and observing, so I may better advice you.

[quote user="Mohsin khan"]When i disconnect all and connect with nrf connect it gives good data rate but not whole data just starting data [/quote]

Please elaborate on what you mean when you say not whole data and good data rate. Is the throughput only good for a limited time?
Does your peripheral logger indicate anything unusual at this time?

Best regards,
Karl

RE: want to achieve 1-2 Mbps through BLE.

Mohsin khan — Tue, 12 Oct 2021 12:20:16 GMT

Please tell me something about this nrf toolbox and nrf connect issue .

RE: want to achieve 1-2 Mbps through BLE.

Karl Ylvisaker — Tue, 12 Oct 2021 10:54:28 GMT

[quote user="Mohsin khan"]

when i remove this code runs well but when i disconnect and then disconnect this gives me this error .

<error> app: ERROR 13313 [Unknown error code] at D:\nrf5\nRF5_SDK_17.0.2_d674dde\examples\ble_central\ble_app_hrs_c\main.c:1606
PC at: 0x0002D745

I have removed that error by adding this condition .

I have tested but same results .

[/quote]

This error is commonly returned when you attempt to queue a notification or write operation without being in a connection (no valid connection handle), or when the Attribute table for the connection has yet been filled in.
You could move this code section into the ble_evt_handler to handle the event when it occurs.

[quote user="Mohsin khan"]I didn't understand this can you please elaborate or give me code of this . [/quote]

The simplest way to implement this is to create a boolean variable that is set when NRF_ERROR_RESOURCES is returned from ble_nus_data_send, and cleared on the BLE_GATTS_EVT_HVN_TX_COMPLETE event. Then, you could use this variable in your main loop to either go to SYSTEM_ON sleep (by calling idle_state_handler) or to queue new data. This way, you will ensure that the hvn queue is always full, so that you know that you will be sending the maximum amount of data each connection event.

In your current implementation you are going to SYSTEM_ON sleep between the queueing of each notification, which requires an event to wake the CPU so that it can continue queueing notifications. Therefore, you might not be queueing the full amount of notifications in between each connection event.

Best regards,
Karl