/**
 * 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
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 * 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.
 *
 */
/** @file
 *
 * @defgroup ble_sdk_uart_over_ble_main main.c
 * @{
 * @ingroup  ble_sdk_app_nus_eval
 * @brief    UART over BLE application main file.
 *
 * This file contains the source code for a sample application that uses the Nordic UART service.
 * This application uses the @ref srvlib_conn_params module.
 */


#include <stdint.h>
#include <string.h>
#include "ble_db_discovery.h"
#include "nordic_common.h"
#include "nrf.h"
#include "boards.h"
#include "app_error.h"
#include "ble.h"
#include "ble_err.h"
#include "ble_hci.h"
#include "ble_srv_common.h"
#include "ble_advdata.h"
#include "ble_conn_params.h"
#include "ble_conn_state.h"
#include "nrf_sdh.h"
#include "nrf_sdh_ble.h"
#include "app_timer.h"
#include "app_button.h"
#include "ble_lbs.h"
#include "nrf_ble_gatt.h"
#include "nrf_ble_qwr.h"
#include "nrf_pwr_mgmt.h"
#include "ble_nus.h"
#include "ble_nus_c.h"
#include "app_uart.h"
#include "app_util_platform.h"
#include "ble_advertising.h"
#include "nrf_log.h"
#include "nrf_log_ctrl.h"
#include "nrf_log_default_backends.h"
#include "bsp_btn_ble.h"
#include "ble_nus_c.h"
#include "nrf_ble_scan.h"
#include "nrf_wdt.h"
#include "nrf_delay.h"
#include "nrf_drv_twi.h"
#include "ble_tps.h"
#include "ble_ias.h"
#include "ble_lls.h"
#include "ble_bas.h"
#include "ble_ias_c.h"
#include "peer_manager.h"
#include "peer_manager_handler.h"
#include "fds.h"
#include "nrf_soc.h"
#include "nrf_drv_saadc.h"
#include "app_pwm.h"
#define I2C_24C128_SLAVE_ADDR        0x50 
//#define I2C_24C128_SLAVE_ADDR        0x57 
//(0xA0 >> 1)
/* Common addresses definition for temperature sensor. */
#define LM75B_ADDR          (0x90U >> 1)

#define LM75B_REG_TEMP      0x00U
#define LM75B_REG_CONF      0x01U
#define LM75B_REG_THYST     0x02U
#define LM75B_REG_TOS       0x03U


#define DS1307_ADDR        (0x68)

#define DS1307_SEC (0x00)
#define DS1307_MIN (0x01)
#define DS1307_HRS (0x02)
#define DS1307_DAY (0x03)
#define DS1307_DATE (0x04)
#define DS1307_MONTH (0x05)
#define DS1307_YEAR (0x06)

/* Define version of GCC. */
#define GCC_VERSION (__GNUC__ * 10000 \
                     + __GNUC_MINOR__ * 100 \
                     + __GNUC_PATCHLEVEL__)

/**
 * @brief Structure for holding sum of samples from accelerometer.
 */


#ifdef __GNUC_PATCHLEVEL__
#if GCC_VERSION < 50505
#pragma GCC diagnostic push
#pragma GCC diagnostic ignored "-Wmissing-braces"           // Hack to GCC 4.9.3 bug. Can be deleted after switch on using GCC 5.0.0
#endif
#endif
/* Buffer for samples. */

#ifdef __GNUC_PATCHLEVEL__
#if GCC_VERSION < 50505
#pragma GCC diagnostic pop
#endif
#endif


uint8_t t[6]={0};
uint8_t RTC_flag=0, a_flag=0, x_flag=0,z_flag=0;
uint16_t          batt_lvl_in_milli_volts;
uint8_t           percentage_batt_lvl;
uint8_t battery_buffer[3];
extern uint8_t flag2;

unsigned long int time_counter = 0, temp_counter = 0, temp_counter2 = 1;
/* Indicates if operation on TWI has ended. */
static volatile bool m_xfer_done = false;

/* TWI instance. */

uint8_t data_array[237];
uint8_t hexs[16];
static const nrf_drv_twi_t m_twi_mma_EEP = NRF_DRV_TWI_INSTANCE(0);

/* Buffer for samples read from temperature sensor. */
static uint8_t m_sample[3];

void eep_WriteByte(uint16_t eep_address, unsigned char val);
unsigned char eep_readByte(uint16_t eep_address);
ret_code_t err_codecpy;
extern uint8_t gateway_flag;
//uint8_t *device_name;
uint8_t new_arr[240] = {0};
//uint8_t new_arr2[100];
//uint16_t count=0;
APP_TIMER_DEF(tx_timer); 

#if defined (UART_PRESENT)
#include "nrf_uart.h"
#endif
#if defined (UARTE_PRESENT)
#include "nrf_uarte.h"
#endif

#include "nrf_log.h"
#include "nrf_log_ctrl.h"
#include "nrf_log_default_backends.h"
#include "bsp.h"
#define APP_BLE_CONN_CFG_TAG            1                                           /**< A tag identifying the SoftDevice BLE configuration. */

//#define DEVICE_NAME                     "tag_d598"                               /**< Name of device. Will be included in the advertising data. */
//#define DEVICE_NAME                     "tag_af27"                               /**< Name of device. Will be included in the advertising data. */
//#define DEVICE_NAME                     "tag_c035"                               /**< Name of device. Will be included in the advertising data. */
//#define DEVICE_NAME                     "tag_59A7"                               /**< Name of device. Will be included in the advertising data. */
//#define DEVICE_NAME                     "tag_9526"                               /**< Name of device. Will be included in the advertising data. */
//#define DEVICE_NAME                     "tag_3454"                               /**< Name of device. Will be included in the advertising data. */
//#define DEVICE_NAME                     "tag_2721"                               /**< Name of device. Will be included in the advertising data. */
//#define DEVICE_NAME                     "tag_153c"                               /**< Name of device. Will be included in the advertising data. */
//#define DEVICE_NAME                     "tag_7212"                               /**< Name of device. Will be included in the advertising data. */
//#define DEVICE_NAME                     "tag_dff5"                               /**< Name of device. Will be included in the advertising data. */
//#define DEVICE_NAME                     "tag_3420"                               /**< Name of device. Will be included in the advertising data. */
//#define DEVICE_NAME                     "tag_d110"                               /**< Name of device. Will be included in the advertising data. */
//#define DEVICE_NAME                     "tag_e138"                               /**< Name of device. Will be included in the advertising data. */
//#define DEVICE_NAME                     "tag_2c39"                               /**< Name of device. Will be included in the advertising data. */
//#define DEVICE_NAME                     "tag_c878"                                 /**< Name of device. Will be included in the advertising data. */
//#define DEVICE_NAME                     "tag_ed29"                                 /**< Name of device. Will be included in the advertising data. */
//#define DEVICE_NAME                     "tag_f4f8"                                 /**< Name of device. Will be included in the advertising data. */
//#define DEVICE_NAME                     "tag_ddce"                                 /**< Name of device. Will be included in the advertising data. */
//#define DEVICE_NAME                     "tag_ed29"                                 /**< Name of device. Will be included in the advertising data. */
//#define DEVICE_NAME                     "tag_fd84"                                 /**< Name of device. Will be included in the advertising data. */
//#define DEVICE_NAME                     "tag_6577"                                 /**< Name of device. Will be included in the advertising data. */
#define DEVICE_NAME                     "tag_c586"                                 /**< Name of device. Will be included in the advertising data. */
//#define DEVICE_NAME                     "tag_e138"                                 /**< Name of device. Will be included in the advertising data. */
//#define DEVICE_NAME                     "t_68dd_cell"                            /**< Name of device. Will be included in the advertising data. */

#define APP_BLE_OBSERVER_PRIO           3                                       /**< Application's BLE observer priority. You shouldn't need to modify this value. */
#define APP_BLE_CONN_CFG_TAG            1                                       /**< A tag identifying the SoftDevice BLE configuration. */

#define BATTERY_LEVEL_MEAS_INTERVAL     APP_TIMER_TICKS(120000)                 /**< Battery level measurement interval (ticks). This value corresponds to 120 seconds. */

#define MIN_CONN_INTERVAL               MSEC_TO_UNITS(500, UNIT_1_25_MS)        /**< Minimum acceptable connection interval (0.5 seconds).  */
#define MAX_CONN_INTERVAL               MSEC_TO_UNITS(1000, UNIT_1_25_MS)       /**< Maximum acceptable connection interval (1 second). */
#define SLAVE_LATENCY                   0                                       /**< Slave latency. */
#define CONN_SUP_TIMEOUT                MSEC_TO_UNITS(4000, UNIT_10_MS)         /**< Connection supervisory timeout (4 seconds). */

#define APP_ADV_INTERVAL                40                                       /**< The advertising interval (in units of 0.625 ms. This value corresponds to 25 ms). */

#define APP_ADV_DURATION                0                                    /**< The advertising duration (180 seconds) in units of 10 milliseconds. */

#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                                       /**< Number of attempts before giving up the connection parameter negotiation. */

#define SEC_PARAM_BOND                  1                                       /**< Perform bonding. */
#define SEC_PARAM_MITM                  0                                       /**< Man In The Middle protection not required. */
#define SEC_PARAM_LESC                  0                                       /**< LE Secure Connections not 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. */
#define SEC_PARAM_MAX_KEY_SIZE          16                                      /**< Maximum encryption key size. */

#define INITIAL_LLS_ALERT_LEVEL         BLE_CHAR_ALERT_LEVEL_NO_ALERT           /**< Initial value for the Alert Level characteristic in the Link Loss service. */
#define TX_POWER_LEVEL                  (+0)                                    /**< TX Power Level value. This will be set both in the TX Power service, in the advertising data, and also used to set the radio transmit power. */

#define ADC_REF_VOLTAGE_IN_MILLIVOLTS   600                                     /**< Reference voltage (in milli volts) used by ADC while doing conversion. */
#define ADC_PRE_SCALING_COMPENSATION    6                                       /**< The ADC is configured to use VDD with 1/3 prescaling as input. And hence the result of conversion is to be multiplied by 3 to get the actual value of the battery voltage.*/
#define DIODE_FWD_VOLT_DROP_MILLIVOLTS  270                                     /**< Typical forward voltage drop of the diode . */
#define ADC_RES_10BIT                   1024                                    /**< Maximum digital value for 10-bit ADC conversion. */

#define DEAD_BEEF                       0xDEADBEEF                              /**< Value used as error code on stack dump, can be used to identify stack location on stack unwind. */
#define NUS_SERVICE_UUID_TYPE           BLE_UUID_TYPE_VENDOR_BEGIN                  /**< UUID type for the Nordic UART Service (vendor specific). */
#define ECHOBACK_BLE_UART_DATA  1                                       /**< Echo the UART data that is received over the Nordic UART Service (NUS) back to the sender. */
#define UART_TX_BUF_SIZE                256                                         /**< UART TX buffer size. */
#define UART_RX_BUF_SIZE                256                                         /**< UART RX buffer size. */
#define NOTIFICATION_INTERVAL           APP_TIMER_TICKS(1000) 
/**@brief Macro to convert the result of ADC conversion in millivolts.
 *
 * @param[in]  ADC_VALUE   ADC result.
 *
 * @retval     Result converted to millivolts.
 */
#define ADC_RESULT_IN_MILLI_VOLTS(ADC_VALUE)\
        ((((ADC_VALUE) * ADC_REF_VOLTAGE_IN_MILLIVOLTS) / ADC_RES_10BIT) * ADC_PRE_SCALING_COMPENSATION)



//static ble_gap_adv_params_t m_adv_params;                                  /**< Parameters to be passed to the stack when starting advertising. */
//static uint8_t              m_adv_handle = BLE_GAP_ADV_SET_HANDLE_NOT_SET; /**< Advertising handle used to identify an advertising set. */
//static uint8_t              m_enc_advdata[BLE_GAP_ADV_SET_DATA_SIZE_MAX];  /**< Buffer for storing an encoded advertising set. */




//APP_TIMER_DEF(m_battery_timer_id);                      /**< Battery measurement timer. */
BLE_TPS_DEF(m_tps);                                     /**< TX Power service instance. */
BLE_IAS_DEF(m_ias, NRF_SDH_BLE_TOTAL_LINK_COUNT);       /**< Immediate Alert service instance. */
BLE_LLS_DEF(m_lls);                                     /**< Link Loss service instance. */
BLE_BAS_DEF(m_bas);                                     /**< Battery service instance. */
BLE_IAS_C_DEF(m_ias_c);                                 /**< Immediate Alert Service client instance. */
//NRF_BLE_GATT_DEF(m_gatt);                               /**< GATT module instance. */
//NRF_BLE_QWR_DEF(m_qwr);                                 /**< Context for the Queued Write module.*/
BLE_ADVERTISING_DEF(m_advertising);                     /**< Advertising module instance. */
BLE_DB_DISCOVERY_DEF(m_ble_db_discovery);               /**< DB discovery module instance. */
//NRF_BLE_GQ_DEF(m_ble_gatt_queue,                        /**< BLE GATT Queue instance. */
//               NRF_SDH_BLE_PERIPHERAL_LINK_COUNT,
//               NRF_BLE_GQ_QUEUE_SIZE);

static volatile bool m_is_high_alert_signalled;         /**< Variable to indicate whether a high alert has been signalled to the peer. */
static volatile bool m_is_ias_present = false;          /**< Variable to indicate whether the immediate alert service has been discovered at the connected peer. */
static nrf_saadc_value_t adc_buf[2];
nrf_saadc_value_t adc_result;
static void on_ias_evt(ble_ias_t * p_ias, ble_ias_evt_t * p_evt);
static void on_lls_evt(ble_lls_t * p_lls, ble_lls_evt_t * p_evt);
static void on_ias_c_evt(ble_ias_c_t * p_lls, ble_ias_c_evt_t * p_evt);
static void on_bas_evt(ble_bas_t * p_bas, ble_bas_evt_t * p_evt);
//static void advertising_init(void);
static void advertising_start();
BLE_NUS_C_DEF(m_ble_nus_c);                                             /**< BLE Nordic UART Service (NUS) client instance. */
BLE_NUS_DEF(m_nus, NRF_SDH_BLE_TOTAL_LINK_COUNT);                                   /**< BLE NUS service instance. */
NRF_BLE_GATT_DEF(m_gatt);                                                           /**< GATT module instance. */
NRF_BLE_QWR_DEF(m_qwr);                                                             /**< Context for the Queued Write module.*/
//BLE_ADVERTISING_DEF(m_advertising);                                                 /**< Advertising module instance. */

NRF_BLE_SCAN_DEF(m_scan);                                               /**< Scanning Module instance. */

NRF_BLE_GQ_DEF(m_ble_gatt_queue,                                        /**< BLE GATT Queue instance. */
               NRF_SDH_BLE_CENTRAL_LINK_COUNT,
               NRF_BLE_GQ_QUEUE_SIZE);
static uint16_t   m_conn_handle          = BLE_CONN_HANDLE_INVALID;                 /**< Handle of the current connection. */
static uint16_t   m_ble_nus_max_data_len = BLE_GATT_ATT_MTU_DEFAULT - 3;            /**< Maximum length of data (in bytes) that can be transmitted to the peer by the Nordic UART service module. */

static ble_uuid_t m_adv_uuids[]          =                                          /**< Universally unique service identifier. */
{
    {BLE_UUID_NUS_SERVICE, NUS_SERVICE_UUID_TYPE}
};

/**@brief NUS UUID. */
static ble_uuid_t const m_nus_uuid =
{
    .uuid = BLE_UUID_NUS_SERVICE,
    .type = NUS_SERVICE_UUID_TYPE
};

/**@brief Function for handling Service errors.
 *
 * @details A pointer to this function will be passed to each service which may need to inform the
 *          application about an error.
 *
 * @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 Peer Manager events.
 *
 * @param[in] p_evt  Peer Manager event.
 */
static void pm_evt_handler(pm_evt_t const * p_evt)
{
    pm_handler_on_pm_evt(p_evt);
    pm_handler_flash_clean(p_evt);

    switch (p_evt->evt_id)
    {
        case PM_EVT_PEERS_DELETE_SUCCEEDED:
            advertising_start(false);
            break;

        default:
            break;
    }
}


/**@brief Function for handling the ADC interrupt.
 *
 * @details  This function will fetch the conversion result from the ADC, convert the value into
 *           percentage and send it to peer.
 */
void saadc_event_handler(nrf_drv_saadc_evt_t const * p_event)
{
    if (p_event->type == NRF_DRV_SAADC_EVT_DONE)
    {
        //nrf_saadc_value_t adc_result;
        //uint16_t          batt_lvl_in_milli_volts;
        //uint8_t           percentage_batt_lvl;
        uint32_t          err_code;

        adc_result = p_event->data.done.p_buffer[0];
        
        printf("\n%d",adc_result);
        err_code = nrf_drv_saadc_buffer_convert(p_event->data.done.p_buffer, 1);
        APP_ERROR_CHECK(err_code);

        batt_lvl_in_milli_volts = ADC_RESULT_IN_MILLI_VOLTS(adc_result) +
                                  DIODE_FWD_VOLT_DROP_MILLIVOLTS;
        percentage_batt_lvl = battery_level_in_percent(batt_lvl_in_milli_volts);
        printf("\n%d",batt_lvl_in_milli_volts);
        printf("\n%d",percentage_batt_lvl);
        err_code = ble_bas_battery_level_update(&m_bas, percentage_batt_lvl, BLE_CONN_HANDLE_ALL);
        //eep_WriteByte(130,percentage_batt_lvl);
        if ((err_code != NRF_SUCCESS) &&
            (err_code != NRF_ERROR_INVALID_STATE) &&
            (err_code != NRF_ERROR_RESOURCES) &&
            (err_code != NRF_ERROR_BUSY) &&
            (err_code != BLE_ERROR_GATTS_SYS_ATTR_MISSING)
           )
        {
            APP_ERROR_HANDLER(err_code);
        }
    }
}


/**@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_ias_c_on_db_disc_evt(&m_ias_c, p_evt);
}


/**@brief Function for configuring ADC to do battery level conversion.
 */
static void adc_configure(void)
{
    ret_code_t err_code = nrf_drv_saadc_init(NULL, saadc_event_handler);
    APP_ERROR_CHECK(err_code);

    nrf_saadc_channel_config_t config =
        NRF_DRV_SAADC_DEFAULT_CHANNEL_CONFIG_SE(NRF_SAADC_INPUT_VDD);
    err_code = nrf_drv_saadc_channel_init(0, &config);
    APP_ERROR_CHECK(err_code);

    err_code = nrf_drv_saadc_buffer_convert(&adc_buf[0], 1);
    APP_ERROR_CHECK(err_code);

    err_code = nrf_drv_saadc_buffer_convert(&adc_buf[1], 1);
    APP_ERROR_CHECK(err_code);
}


/**
 * @brief Function for setting active mode on MMA7660 accelerometer.
 */
void DS3231_set_mode(void)
{
    ret_code_t err_code;
    uint8_t reg[2] = {0x00,0x05};
    err_code = nrf_drv_twi_tx(&m_twi_mma_EEP,DS1307_ADDR, reg, sizeof(reg), false);  
    APP_ERROR_CHECK(err_code); 
    //uint8_t reg1[8] = {DS1307_SEC,0x20,0x13,0x12,0x02,0x30,0x04,0x21};
    //err_code = nrf_drv_twi_tx(&m_twi_mma_EEP,DS1307_ADDR, reg1, sizeof(reg1), false); 
    //APP_ERROR_CHECK(err_code);
    //while (m_xfer_done == false);
}




/**
 * @brief Function for handling data from temperature sensor.
 *
 * @param[in] temp          Temperature in Celsius degrees read from sensor.
 */
__STATIC_INLINE void data_handler(uint8_t *temp)
{
    //NRF_LOG_INFO("Temperature: %d Celsius degrees.", temp);

            //printf("%2x:%2x:%2x",
            //            temp[2],
            //            temp[1],
            //            temp[0] 
            //       );
            // printf("\n");

    time_counter++;
            if(time_counter == temp_counter + 17)
            {
                printf("%2x:%2x:%2x",
                        temp[2],
                        temp[1],
                        temp[0] 
                   );
             printf("\n");
            }

             if(time_counter == temp_counter + 18)
             {
                printf("%2x:%2x",
                        temp[1],
                        temp[2] 
                   );
             }
             if(time_counter == temp_counter + 19){
             printf(":%2x",temp[0]);
             printf("\n");
             temp_counter = time_counter;
             }
}



/**@brief Function for handling the Battery measurement timer timeout.
 *
 * @details This function will be called each time the battery level measurement timer expires.
 *          This function will start the ADC.
 *
 * @param[in] p_context   Pointer used for passing some arbitrary information (context) from the
 *                        app_start_timer() call to the timeout handler.
 */
static void battery_level_meas_timeout_handler(void * p_context)
{
    UNUSED_PARAMETER(p_context);

    ret_code_t err_code;
    err_code = nrf_drv_saadc_sample();
    APP_ERROR_CHECK(err_code);
}


/**
 * @brief TWI events handler.
 */
void twi_handler(nrf_drv_twi_evt_t const * p_event, void * p_context)
{
    switch (p_event->type)
    {
        case NRF_DRV_TWI_EVT_DONE:
            if (p_event->xfer_desc.type == NRF_DRV_TWI_XFER_RX)
            {
                data_handler(m_sample);
                //printf("%2x",m_sample[0]);
                //printf("\n");
            }
            m_xfer_done = true;
            break;
        default:
            break;
    }
}

void  twi_init (void)
{
    ret_code_t err_code;
     //ret_code_t ret;
    const nrf_drv_twi_config_t twi_mma_EEP_config = {
       .scl                = ARDUINO_SCL_PIN,
       .sda                = ARDUINO_SDA_PIN,
       .frequency          = NRF_TWI_FREQ_100K,
       .interrupt_priority = APP_IRQ_PRIORITY_HIGH
    };
  
    err_code = nrf_drv_twi_init(&m_twi_mma_EEP, &twi_mma_EEP_config, NULL, NULL); //twi_handler
    APP_ERROR_CHECK(err_code);
    nrf_drv_twi_enable(&m_twi_mma_EEP);		
    err_codecpy=err_code;
    nrf_delay_ms(5);
}

unsigned char eep_readByte(uint16_t eep_address){

    unsigned char eep_by_address[2];
    unsigned char reg=0;
    eep_by_address[1]   = eep_address;
    eep_by_address[0] = (unsigned char)(eep_address << 8);
    // setting the start address
    nrf_drv_twi_tx(&m_twi_mma_EEP, I2C_24C128_SLAVE_ADDR, eep_by_address, 2, true);
    // read a byte
    nrf_drv_twi_rx(&m_twi_mma_EEP, I2C_24C128_SLAVE_ADDR, &reg,1);

    nrf_delay_ms(5);
	return reg;
}
void eep_WriteByte(uint16_t eep_address, unsigned char val){

    unsigned char eep_by_address[3];
    eep_by_address[2] = val;
    eep_by_address[1] = eep_address;
    eep_by_address[0] = (unsigned char)(eep_address << 8);

    nrf_drv_twi_tx(&m_twi_mma_EEP, I2C_24C128_SLAVE_ADDR, eep_by_address, 3, false);
    nrf_delay_ms(5);
}



//-----send message------//

void send_message()
{
 ble_conn_state_conn_handle_list_t conn_handles = ble_conn_state_periph_handles();
    
    uint32_t       err_code;
    uint16_t length = 237;
    //uint8_t data_array[237];
    //uint8_t data_array[240] = "9ECADC240EE5A9E093F39ECADC240EE5A9E093F39ECADC240EE5A9E093F39ECADC240EE5A9E093F39ECADC240EE5A9E093F39ECADC240EE5A9E093F39ECADC240EE5A9E093F39ECADC240EE5A9E093F39ECADC240EE5A9E093F39ECADC240EE5A9E093F39ECADC240EE5A9E093FZ";

    for(int i =0;i<128;i++)
        data_array[i]= new_arr[i];
        data_array[128] = hexs[0];     //'C'; 
        data_array[129] = hexs[1];     //'8';
        data_array[130] = hexs[2];     //'7';
        data_array[131] = hexs[3];     //'8';
        data_array[132] = hexs[4];     //'A';
        data_array[133] = hexs[5];     //'1';
        data_array[134] = hexs[6];     //'E';
        data_array[135] = hexs[7];     //'3';
        data_array[136] = hexs[8];     //'F';
        data_array[137] = hexs[9];      //'4';
        data_array[138] = hexs[10];     //'D';
        data_array[139] = hexs[11];     //'C';


    //    data_array[140] = battery_buffer[0];
    //    data_array[141] = battery_buffer[1];
    //    data_array[142] = '%';

        for(int i =140;i<236;i++)
        data_array[i]= new_arr[i];
    NRF_LOG_DEBUG("Ready to send data over BLE NUS");
    printf("Ready to send data over BLE NUS");
    NRF_LOG_HEXDUMP_DEBUG(data_array, length);


    do
    {
        
        for (uint8_t i = 0; i < conn_handles.len; i++)  //--this does not work
        {
            m_conn_handle = conn_handles.conn_handles[i];
            printf("\r\nconnection handle length: %d", conn_handles.conn_handles[i]);
            err_code = ble_nus_data_send(&m_nus, data_array, &length, m_conn_handle);
            //bsp_board_led_off(2);
        }
        //err_code = ble_nus_data_send(&m_nus, data_array, &length, m_conn_handle);-- This works
        printf("\r\nerror code: %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);
        }
        //bsp_board_led_off(2);
        //bsp_board_led_off(3);
        //bsp_board_led_off(1);
        //nrf_delay_ms(5000);
    } while (err_code == NRF_ERROR_RESOURCES);
    if(err_code == NRF_SUCCESS)
    {
          printf("\r\n message sent\r\n");
          for(uint8_t i=0;i<6;i++)
          {
            bsp_board_led_off(2);
            nrf_delay_ms(100);
            bsp_board_led_on(2);
            nrf_delay_ms(100);
          }
          for(uint8_t i=0;i<300;i++)
          {
            eep_WriteByte(i,0xFF);
          }    
          
    }

}
//-----send message------//


/**@brief Function for assert macro callback.
 *
 * @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 analyse
 *          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(DEAD_BEEF, line_num, p_file_name);
}

/**@brief Function for the Timer initialization.
 *
 * @details Initializes the timer module.
 */
static void timers_init(void)
{
    // Initialize timer module, making it use the scheduler
    ret_code_t err_code = app_timer_init();
    APP_ERROR_CHECK(err_code);
    err_code = app_timer_create(&tx_timer,
                                APP_TIMER_MODE_REPEATED,
                                System_ticks_incrementals);
   
    
}

/**@brief Function for the GAP initialization.
 *
 * @details This function will set up all the necessary GAP (Generic Access Profile) parameters of
 *          the device. It also sets the permissions and appearance.
 */
static void gap_params_init(void)
{
    uint32_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);
}


/**@brief Function for handling Queued Write Module errors.
 *
 * @details A pointer to this function will be passed to each service which may need to inform the
 *          application about an error.
 *
 * @param[in]   nrf_error   Error code containing information about what went wrong.
 */
static void nrf_qwr_error_handler(uint32_t nrf_error)
{
    APP_ERROR_HANDLER(nrf_error);
}


/**@brief Function for handling the Nordic UART Service Client errors.
 *
 * @param[in]   nrf_error   Error code containing information about what went wrong.
 */
static void nus_error_handler(uint32_t nrf_error)
{
    APP_ERROR_HANDLER(nrf_error);
}


/**@brief Function to start scanning. */
static void scan_start(void)
{
    ret_code_t ret;

    ret = nrf_ble_scan_start(&m_scan);
    APP_ERROR_CHECK(ret);

    ret = bsp_indication_set(BSP_INDICATE_SCANNING);
    APP_ERROR_CHECK(ret);
}


/**@brief Function for handling Scanning Module events.
 */
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_CONNECTING_ERROR:
         {
              err_code = p_scan_evt->params.connecting_err.err_code;
              APP_ERROR_CHECK(err_code);
         } break;

         case NRF_BLE_SCAN_EVT_CONNECTED:
         {
              ble_gap_evt_connected_t const * p_connected =
                               p_scan_evt->params.connected.p_connected;
             // Scan is automatically stopped by the connection.
             NRF_LOG_INFO("Connecting to target %02x%02x%02x%02x%02x%02x",
                      p_connected->peer_addr.addr[0],
                      p_connected->peer_addr.addr[1],
                      p_connected->peer_addr.addr[2],
                      p_connected->peer_addr.addr[3],
                      p_connected->peer_addr.addr[4],
                      p_connected->peer_addr.addr[5]
                      );
         } break;

         case NRF_BLE_SCAN_EVT_SCAN_TIMEOUT:
         {
             NRF_LOG_INFO("Scan timed out.");
             scan_start();
         } break;

         default:
             break;
    }
}


/**@brief Function for initializing the scanning and setting the 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.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);

    err_code = nrf_ble_scan_filter_set(&m_scan, SCAN_UUID_FILTER, &m_nus_uuid);
    APP_ERROR_CHECK(err_code);

    err_code = nrf_ble_scan_filters_enable(&m_scan, NRF_BLE_SCAN_UUID_FILTER, false);
    APP_ERROR_CHECK(err_code);
}

/**@brief Function for handling the data from the Nordic UART Service.
 *
 * @details This function will process the data received from the Nordic UART BLE Service and send
 *          it to the UART module.
 *
 * @param[in] p_evt       Nordic UART Service event.
 */

/**@brief Function for handling database discovery events.
 *
 * @details This function is a callback function to handle events from the database discovery module.
 *          Depending on the UUIDs that are discovered, this function forwards 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_nus_c_on_db_disc_evt(&m_ble_nus_c, p_evt);
//}


/**@snippet [Handling the data received over BLE] */
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_LOG_DEBUG("Received data from BLE NUS. Writing data on UART.");
        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++)
        {
            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);
        }
    }

}
/**@snippet [Handling the data received over BLE] */


/**@brief Function for initializing the Queued Write module.
 */
static void qwr_init(void)
{
    ret_code_t         err_code;
    nrf_ble_qwr_init_t qwr_init_obj = {0};

    // Initialize Queued Write Module.
    qwr_init_obj.error_handler = nrf_qwr_error_handler;

    err_code = nrf_ble_qwr_init(&m_qwr, &qwr_init_obj);
    APP_ERROR_CHECK(err_code);
}

/**@brief Function for initializing the TX Power Service.
 */
static void tps_init(void)
{
    ret_code_t     err_code;
    ble_tps_init_t tps_init_obj;

    memset(&tps_init_obj, 0, sizeof(tps_init_obj));
    tps_init_obj.initial_tx_power_level = TX_POWER_LEVEL;

    tps_init_obj.tpl_rd_sec = SEC_JUST_WORKS;

    err_code = ble_tps_init(&m_tps, &tps_init_obj);
    APP_ERROR_CHECK(err_code);
}


/**@brief Function for initializing the Immediate Alert Service.
 */
static void ias_init(void)
{
    ret_code_t     err_code;
    ble_ias_init_t ias_init_obj;

    memset(&ias_init_obj, 0, sizeof(ias_init_obj));
    ias_init_obj.evt_handler  = on_ias_evt;

    ias_init_obj.alert_wr_sec = SEC_JUST_WORKS;

    err_code = ble_ias_init(&m_ias, &ias_init_obj);
    APP_ERROR_CHECK(err_code);
}


/**@brief Function for initializing the Link Loss Service.
 */
static void lls_init(void)
{
    ret_code_t     err_code;
    ble_lls_init_t lls_init_obj;

    // Initialize Link Loss Service
    memset(&lls_init_obj, 0, sizeof(lls_init_obj));

    lls_init_obj.evt_handler         = on_lls_evt;
    lls_init_obj.error_handler       = service_error_handler;
    lls_init_obj.initial_alert_level = INITIAL_LLS_ALERT_LEVEL;

    lls_init_obj.alert_level_rd_sec = SEC_JUST_WORKS;
    lls_init_obj.alert_level_wr_sec = SEC_JUST_WORKS;

    err_code = ble_lls_init(&m_lls, &lls_init_obj);
    APP_ERROR_CHECK(err_code);
}


/**@brief Function for initializing the Battery Service.
 */
static void bas_init(void)
{
    ret_code_t     err_code;
    ble_bas_init_t bas_init_obj;

    memset(&bas_init_obj, 0, sizeof(bas_init_obj));

    bas_init_obj.evt_handler          = on_bas_evt;
    bas_init_obj.support_notification = true;
    bas_init_obj.p_report_ref         = NULL;
    bas_init_obj.initial_batt_level   = 100;

    bas_init_obj.bl_rd_sec        = SEC_OPEN;
    bas_init_obj.bl_cccd_wr_sec   = SEC_OPEN;
    bas_init_obj.bl_report_rd_sec = SEC_OPEN;

    err_code = ble_bas_init(&m_bas, &bas_init_obj);
    APP_ERROR_CHECK(err_code);
}


/**@brief Function for initializing the immediate alert service client.
 *
 * @details This will initialize the client side functionality of the Find Me profile.
 */
static void ias_client_init(void)
{
    ret_code_t       err_code;
    ble_ias_c_init_t ias_c_init_obj;

    memset(&ias_c_init_obj, 0, sizeof(ias_c_init_obj));

    m_is_high_alert_signalled = false;

    ias_c_init_obj.evt_handler   = on_ias_c_evt;
    ias_c_init_obj.error_handler = service_error_handler;
    ias_c_init_obj.p_gatt_queue  = &m_ble_gatt_queue;

    err_code = ble_ias_c_init(&m_ias_c, &ias_c_init_obj);
    APP_ERROR_CHECK(err_code);
}


/**@brief Function for initializing services that will be used by the application.
 */
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;

    err_code = nrf_ble_qwr_init(&m_qwr, &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);

    //qwr_init();
    tps_init();
    ias_init();
    lls_init();
    //bas_init();
    ias_client_init();
}


/**@brief Function for the Signals alert event from Immediate Alert or Link Loss services.
 *
 * @param[in] alert_level  Requested alert level.
 */
static void alert_signal(uint8_t alert_level)
{
    ret_code_t err_code;

    switch (alert_level)
    {
        case BLE_CHAR_ALERT_LEVEL_NO_ALERT:
            NRF_LOG_INFO("No Alert.");
            err_code = bsp_indication_set(BSP_INDICATE_ALERT_OFF);
            APP_ERROR_CHECK(err_code);
            break; // BLE_CHAR_ALERT_LEVEL_NO_ALERT

        case BLE_CHAR_ALERT_LEVEL_MILD_ALERT:
            NRF_LOG_INFO("Mild Alert.");
            err_code = bsp_indication_set(BSP_INDICATE_ALERT_0);
            APP_ERROR_CHECK(err_code);
            break; // BLE_CHAR_ALERT_LEVEL_MILD_ALERT

        case BLE_CHAR_ALERT_LEVEL_HIGH_ALERT:
            NRF_LOG_INFO("HIGH Alert.");
            err_code = bsp_indication_set(BSP_INDICATE_ALERT_3);
            APP_ERROR_CHECK(err_code);
            break; // BLE_CHAR_ALERT_LEVEL_HIGH_ALERT

        default:
            // No implementation needed.
            break;
    }
}



/**@brief Function for handling Immediate Alert events.
 *
 * @details This function will be called for all Immediate Alert events which are passed to the
 *          application.
 *
 * @param[in] p_ias  Immediate Alert structure.
 * @param[in] p_evt  Event received from the Immediate Alert service.
 */
static void on_ias_evt(ble_ias_t * p_ias, ble_ias_evt_t * p_evt)
{
    switch (p_evt->evt_type)
    {
        case BLE_IAS_EVT_ALERT_LEVEL_UPDATED:
            if (p_evt->p_link_ctx != NULL)
            {
                alert_signal(p_evt->p_link_ctx->alert_level);
            }
            break; // BLE_IAS_EVT_ALERT_LEVEL_UPDATED

        default:
            // No implementation needed.
            break;
    }
}


/**@brief Function for handling Link Loss events.
 *
 * @details This function will be called for all Link Loss events which are passed to the
 *          application.
 *
 * @param[in] p_lls  Link Loss structure.
 * @param[in] p_evt  Event received from the Link Loss service.
 */
static void on_lls_evt(ble_lls_t * p_lls, ble_lls_evt_t * p_evt)
{
    switch (p_evt->evt_type)
    {
        case BLE_LLS_EVT_LINK_LOSS_ALERT:
            alert_signal(p_evt->params.alert_level);
            break; // BLE_LLS_EVT_LINK_LOSS_ALERT

        default:
            // No implementation needed.
            break;
    }
}


/**@brief Function for handling IAS Client events.
 *
 * @details This function will be called for all IAS Client events which are passed to the
 *          application.
 *
 * @param[in] p_ias_c  IAS Client structure.
 * @param[in] p_evt    Event received.
 */
static void on_ias_c_evt(ble_ias_c_t * p_ias_c, ble_ias_c_evt_t * p_evt)
{
    ret_code_t err_code;

    switch (p_evt->evt_type)
    {
        case BLE_IAS_C_EVT_DISCOVERY_COMPLETE:
            // IAS is found on peer. The Find Me Locator functionality of this app will work.
            err_code = ble_ias_c_handles_assign(&m_ias_c,
                                                p_evt->conn_handle,
                                                p_evt->alert_level.handle_value);
            APP_ERROR_CHECK(err_code);

            m_is_ias_present = true;
            break; // BLE_IAS_C_EVT_DISCOVERY_COMPLETE

        case BLE_IAS_C_EVT_DISCOVERY_FAILED:
            // IAS is not found on peer. The Find Me Locator functionality of this app will NOT work.
            break; // BLE_IAS_C_EVT_DISCOVERY_FAILED

        case BLE_IAS_C_EVT_DISCONN_COMPLETE:
            // Disable alert buttons
            m_is_ias_present = false;
            break; // BLE_IAS_C_EVT_DISCONN_COMPLETE

        default:
            break;
    }
}


/**@brief Function for handling the Battery Service events.
 *
 * @details This function will be called for all Battery Service events which are passed to the
 |          application.
 *
 * @param[in] p_bas  Battery Service structure.
 * @param[in] p_evt  Event received from the Battery Service.
 */
static void on_bas_evt(ble_bas_t * p_bas, ble_bas_evt_t * p_evt)
{
    ret_code_t err_code;

    switch (p_evt->evt_type)
    {
        case BLE_BAS_EVT_NOTIFICATION_ENABLED:
            // Start battery timer
            err_code = app_timer_start(tx_timer, BATTERY_LEVEL_MEAS_INTERVAL, NULL);
            APP_ERROR_CHECK(err_code);
            break; // BLE_BAS_EVT_NOTIFICATION_ENABLED

        case BLE_BAS_EVT_NOTIFICATION_DISABLED:
            err_code = app_timer_stop(tx_timer);
            APP_ERROR_CHECK(err_code);
            break; // BLE_BAS_EVT_NOTIFICATION_DISABLED

        default:
            // No implementation needed.
            break;
    }
}

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 Function for handling characters received by the Nordic UART Service (NUS).
 *
 * @details This function takes a list of characters of length data_len and prints the characters out on UART.
 *          If @ref ECHOBACK_BLE_UART_DATA is set, the data is sent back to sender.
 */
static void ble_nus_chars_received_uart_print(uint8_t * p_data, uint16_t data_len)
{
    ret_code_t ret_val;

    NRF_LOG_DEBUG("Receiving data.");
    NRF_LOG_HEXDUMP_DEBUG(p_data, data_len);

    for (uint32_t i = 0; i < data_len; i++)
    {
        do
        {
            ret_val = app_uart_put(p_data[i]);
            if ((ret_val != NRF_SUCCESS) && (ret_val != NRF_ERROR_BUSY))
            {
                NRF_LOG_ERROR("app_uart_put failed for index 0x%04x.", i);
                APP_ERROR_CHECK(ret_val);
            }
        } while (ret_val == NRF_ERROR_BUSY);
    }
    if (p_data[data_len-1] == '\r')
    {
        while (app_uart_put('\n') == NRF_ERROR_BUSY);
    }
    if (ECHOBACK_BLE_UART_DATA)
    {
        // Send data back to the peripheral.
        do
        {
            ret_val = ble_nus_c_string_send(&m_ble_nus_c, p_data, data_len);
            if ((ret_val != NRF_SUCCESS) && (ret_val != NRF_ERROR_BUSY))
            {
                NRF_LOG_ERROR("Failed sending NUS message. Error 0x%x. ", ret_val);
                APP_ERROR_CHECK(ret_val);
            }
        } while (ret_val == NRF_ERROR_BUSY);
    }
}



/**@brief Function for handling an event from the Connection Parameters Module.
 *
 * @details This function will be called for all events in the Connection Parameters Module
 *          which are passed to the application.
 *
 * @note All this function does is to disconnect. This could have been done by simply setting
 *       the disconnect_on_fail config parameter, but instead we use the event handler
 *       mechanism to demonstrate its use.
 *
 * @param[in] p_evt  Event received from the Connection Parameters Module.
 */
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);
    }
}


/**@brief Function for handling errors from the Connection Parameters module.
 *
 * @param[in] nrf_error  Error code containing information about what went wrong.
 */
static void conn_params_error_handler(uint32_t nrf_error)
{
    APP_ERROR_HANDLER(nrf_error);
}


/**@brief Function for initializing the Connection Parameters module.
 */
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);
}


/**@brief Function for putting the chip into sleep mode.
 *
 * @note This function will not return.
 */
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);
}


/**@brief Function for handling advertising events.
 *
 * @details This function will be called for advertising events which are passed to the application.
 *
 * @param[in] ble_adv_evt  Advertising event.
 */
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;
    }
}

/**@snippet [Handling events from the ble_nus_c module] */
static void ble_nus_c_evt_handler(ble_nus_c_t * p_ble_nus_c, ble_nus_c_evt_t const * p_ble_nus_evt)
{
    ret_code_t err_code;

    switch (p_ble_nus_evt->evt_type)
    {
        case BLE_NUS_C_EVT_DISCOVERY_COMPLETE:
            NRF_LOG_INFO("Discovery complete.");
            err_code = ble_nus_c_handles_assign(p_ble_nus_c, p_ble_nus_evt->conn_handle, &p_ble_nus_evt->handles);
            APP_ERROR_CHECK(err_code);

            err_code = ble_nus_c_tx_notif_enable(p_ble_nus_c);
            APP_ERROR_CHECK(err_code);
            NRF_LOG_INFO("Connected to device with Nordic UART Service.");
            break;

        case BLE_NUS_C_EVT_NUS_TX_EVT:
            ble_nus_chars_received_uart_print(p_ble_nus_evt->p_data, p_ble_nus_evt->data_len);
            break;

        case BLE_NUS_C_EVT_DISCONNECTED:
            NRF_LOG_INFO("Disconnected.");
            scan_start();
            break;
    }
}
/**@snippet [Handling events from the ble_nus_c module] */


/**@brief Function for handling BLE events.
 *
 * @param[in]   p_ble_evt   Bluetooth stack event.
 * @param[in]   p_context   Unused.
 */
static void ble_evt_handler(ble_evt_t const * p_ble_evt, void * p_context)
{
    uint32_t err_code;

    switch (p_ble_evt->header.evt_id)
    {
        case BLE_GAP_EVT_CONNECTED:
            NRF_LOG_INFO("Connected");
            err_code = bsp_indication_set(BSP_INDICATE_CONNECTED);
            APP_ERROR_CHECK(err_code);
            m_conn_handle = p_ble_evt->evt.gap_evt.conn_handle;
            err_code = nrf_ble_qwr_conn_handle_assign(&m_qwr, m_conn_handle);
            APP_ERROR_CHECK(err_code);
            break;

        case BLE_GAP_EVT_DISCONNECTED:
            NRF_LOG_INFO("Disconnected");
            // 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_AUTO,
                .tx_phys = BLE_GAP_PHY_AUTO,
            };
            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;
    }
}


/**@brief Function for the SoftDevice initialization.
 *
 * @details This function 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);
    APP_ERROR_CHECK(err_code);

    // Register a handler for BLE events.
    NRF_SDH_BLE_OBSERVER(m_ble_observer, APP_BLE_OBSERVER_PRIO, ble_evt_handler, NULL);
}


/**@brief Function for handling events from the GATT library. */
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);
}


/**@brief Function for initializing the GATT library. */
void gatt_init(void)
{
    ret_code_t err_code;

    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);
}


/**@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)
{
    uint32_t err_code;
    switch (event)
    {
        case BSP_EVENT_SLEEP:
            sleep_mode_enter();
            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:
            if (m_conn_handle == BLE_CONN_HANDLE_INVALID)
            {
                err_code = ble_advertising_restart_without_whitelist(&m_advertising);
                if (err_code != NRF_ERROR_INVALID_STATE)
                {
                    APP_ERROR_CHECK(err_code);
                }
            }
            break;

        default:
            break;
    }
}


/**@brief   Function for handling app_uart events.
 *
 * @details This function will receive a single character from the app_uart module and append it to
 *          a string. The string will be be sent over BLE when the last character received was a
 *          'new line' '\n' (hex 0x0A) or if the string has reached the maximum data length.
 */
/**@snippet [Handling the data received over UART] */
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:
            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_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);
                        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] */


/**@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_ENABLED,
        .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);
}
/**@snippet [UART Initialization] */


/**@brief Function for initializing the Advertising functionality.
 */
static void advertising_init(void)
{
    uint32_t               err_code;
    ble_advertising_init_t init;

    uint8_t power_level = 0x08;
    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_GENERAL_DISC_MODE;
    init.advdata.p_tx_power_level   = &power_level;

    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);
  
    //err_code = sd_ble_gap_tx_power_set(BLE_GAP_TX_POWER_ROLE_ADV, m_adv_handle, (-10));
    //APP_ERROR_CHECK(err_code);
}

/**@brief Function for initializing the Nordic UART Service (NUS) client. */
static void nus_c_init(void)
{
    ret_code_t       err_code;
    ble_nus_c_init_t init;

    init.evt_handler   = ble_nus_c_evt_handler;
    init.error_handler = nus_error_handler;
    init.p_gatt_queue  = &m_ble_gatt_queue;

    err_code = ble_nus_c_init(&m_ble_nus_c, &init);
    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.
 */
/**@brief Function for initializing buttons and leds. */
static void buttons_leds_init(void)
{
    ret_code_t err_code;
    bsp_event_t startup_event;

    err_code = bsp_init(BSP_INIT_LEDS, bsp_event_handler);
    APP_ERROR_CHECK(err_code);

    err_code = bsp_btn_ble_init(NULL, &startup_event);
    APP_ERROR_CHECK(err_code);
}


/**@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 power management.
 */
static void power_management_init(void)
{
    ret_code_t err_code;
    err_code = nrf_pwr_mgmt_init();
    APP_ERROR_CHECK(err_code);
}

volatile uint32_t system_ticks = 0;
void System_ticks_incrementals()
{
    system_ticks++;

}


/** @brief Function for initializing the database discovery module. */
static void db_discovery_init(void)
{
    ble_db_discovery_init_t db_init;

    memset(&db_init, 0, sizeof(ble_db_discovery_init_t));

    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 Function for handling the idle state (main loop).
 *
 * @details If there is no pending log operation, then sleep until next the next event occurs.
 */
static void idle_state_handle(void)
{
    if (NRF_LOG_PROCESS() == false)
    {
        nrf_pwr_mgmt_run();
    }
}

/**@brief Clear bond 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 starting advertising.
 */
static void advertising_start(void)
{
    uint32_t err_code = ble_advertising_start(&m_advertising, BLE_ADV_MODE_FAST);
    APP_ERROR_CHECK(err_code);
}

/**@brief Function for changing the tx power.
 */
static void tx_power_set(void)
{
    ret_code_t err_code = sd_ble_gap_tx_power_set(BLE_GAP_TX_POWER_ROLE_ADV, m_advertising.adv_handle, TX_POWER_LEVEL);
    APP_ERROR_CHECK(err_code);
}

int byteArrayToHexString(uint8_t *byte_array, int byte_array_len,
                         char *hexstr, int hexstr_len)
{
    int off = 0;
    int i = 0;;
    uint8_t A = 0;
    uint8_t B = 0;

    while(off < byte_array_len)
    {
        A = (byte_array[off]>>4) & 0x0f;
        B = (byte_array[off]) & 0x0f;
        if(A >= 0u && A < 0x0au)
        {
          hexstr[i] = A+0x30;
        }
        else if(A >= 0x0au && A <= 0x0fu)
        {
          hexstr[i] = A+55u;
        }

        if(B >= 0u && B < 0x0au)
        {
          hexstr[i+1] = B+0x30;
        }
        else if(B >= 0x0au && B <= 0x0fu)
        {
          hexstr[i+1] = B+55u;
        }
        i = i+2;
        off++;
    }

    hexstr[hexstr_len] = '\0';

    return off;
}

void Read_data(){
 // reading byte-by-byte from EEPROM
    for (int i = 0; i < 128; i++) {
        uint8_t readValue = eep_readByte(i);

        //if (readValue == 0) {
        //    break;
        //}

        char readValueChar = (char)(readValue);
        printf("%c", readValueChar);
        new_arr[i]=readValueChar;
    }
}


void Read_time_data(){
// reading byte-by-byte from EEPROM
    for (int i = 140; i < 236; i++) {
        uint8_t readValue = eep_readByte(i);

        //if (readValue == 0) {
        //    break;
        //}

        char readValueChar = (char)(readValue);
        printf("%c", readValueChar);
        new_arr[i]=readValueChar;
    }

}
uint8_t HR = 0;
uint8_t MN = 0;
uint8_t SS = 0;
uint8_t DD = 0;
uint8_t MM = 0;
uint8_t YY = 0;

uint8_t c =0;

/**
 * @brief Function for reading data from ds3231.
 */
void read_sensor_data()
{
    //m_xfer_done = false;

    /* Read 1 byte from the specified address - skip 3 bits dedicated for fractional part of temperature. */
    ret_code_t err_code = nrf_drv_twi_rx(&m_twi_mma_EEP, DS1307_ADDR, (uint8_t*)&m_sample, 3);
    //APP_ERROR_CHECK(err_code);
            //nrf_delay_ms(2000);

           if(time_counter == temp_counter + 19)
            // if(c == 3)
             {
                 t[0]=       m_sample[2];
                 t[1]=       m_sample[1];
                 t[2]=       m_sample[0];  
                 temp_counter = time_counter;
             }

             if(time_counter == temp_counter2 + 19)
            // if(c == 3)
             {
                 t[3]=       m_sample[1];
                 t[4]=       m_sample[2];
                 t[5]=       0x21;  
                temp_counter2 = time_counter;
                
             }



            //if(m_sample[2] == 0x88){
            //  printf("%2x:%2x:%2x",
            //              m_sample[2],
            //              m_sample[1],
            //              m_sample[0] 
            //         );
            //   printf("\n");
            //   c++;
            // }

          
               // nrf_delay_ms(30);
                time_counter++;
               // if(time_counter == temp_counter + 38)
               // {
               //      //if(RTC_flag == 1)
               //      {
               //        a_flag=1;
               //        t[0]=       m_sample[2];
               //        t[1]=       m_sample[1];
               //        t[2]=       m_sample[0];

               //        //HR=       m_sample[2];
               //        //MN=       m_sample[1];
               //        //SS=       m_sample[0];
               //      }

               // }

               //if(time_counter == temp_counter + 39)
               //{
                
               //   //if(RTC_flag == 1)
               //   {
               //      x_flag=1;
               //      t[3]=       m_sample[1];
               //      t[4]=       m_sample[2];
               //   }
               //}

               //if(time_counter == temp_counter + 40)
               //{
               //     //if(RTC_flag == 1)
               //     {
               //       z_flag=1;
               //       t[5]=       m_sample[0];
               //     }
               //  temp_counter = time_counter;
               //}
}

/**@brief Application main function.
 */
int main(void)
{
    static ble_gap_addr_t mac_addr;
    ret_code_t err_code;
    bool erase_bonds;
    ble_evt_t const * p_ble_evt;
    void * p_contex;        log_init();
    uart_init();
    printf("\r\nUART started begin.\r\n");
    buttons_leds_init();
    buzzer_off();
    //leds_init();
    //buttons_init();
    //power_management_init();
    timers_init();
    app_timer_start(tx_timer, NOTIFICATION_INTERVAL, NULL);    
    db_discovery_init();
    adc_configure();
    peer_manager_init();
    ble_stack_init();
    gap_params_init();
    gatt_init();
    nus_c_init();
    services_init();
    advertising_init();
    conn_params_init();
    advertising_start();
    scan_init();
    twi_init();
    DS3231_set_mode();
    // Start execution.
    NRF_LOG_INFO("peripheral example started.");
    //app_timer_start(tx_timer, NOTIFICATION_INTERVAL, NULL);
    //app_timer_start(tx_timer, NOTIFICATION_INTERVAL, NULL);
    
    err_code = sd_ble_gap_addr_get((ble_gap_addr_t*)(&mac_addr));
    byteArrayToHexString((uint8_t *)mac_addr.addr, 6, hexs, 12);
    tx_power_set();  
    scan_start();
    bsp_board_led_on(0);
    bsp_board_led_on(1);
    bsp_board_led_on(2);
    bsp_board_led_on(3);
    Read_data();
    Read_time_data();
    //int battery_status = eep_readByte(130);
    //if(battery_status == 100){
    //   battery_status = 99;
    //}
    //itoa (battery_status, battery_buffer, 10);
    //printf("\n%d", battery_status);
    
    //if(battery_status < 20){
    //  for(int i =0; i<5;i++)
    //  {
    //    bsp_board_led_off(1);   
    //    bsp_board_led_off(2);
    //    nrf_delay_ms(200);
    //    bsp_board_led_on(1);   
    //    bsp_board_led_on(2);
    //    nrf_delay_ms(200);
    //  }
    //}

    //sd_ble_gap_tx_power_set(BLE_GAP_TX_POWER_ROLE_ADV, m_adv_handle, (-10));
    //app_timer_start(tx_timer, 16UL, NULL);
    //nrf_delay_ms(1000);
    while(1)
    {
        nrf_delay_ms(10);
        read_sensor_data();
    }
}



uint32_t get_System_ticks()
{
    return system_ticks;
}



/**
 * @}
 */