Hi,
I would like to increase the length of read & write characteristic value to 29 bytes. I changed the NRF_SDH_BLE_GAP_DATA_LENGTH = 36 & NRF_SDH_BLE_GATT_MAX_MTU_SIZE = 32. Also changed attr_char_value.max_len = 29 & ram settings & hvx_params.p_len = &gatts_value.len. But on nrfconnect I could see only 22 bytes for read characteristic & 2 bytes for write characteristic. What am I missing?
Hi,
What SDK version and example do you use?
What is the value of &gatts_value.len?
Best regards,
Amanda
I'm using ble_app_template example in SDK 15.2.
I have set gatts_value.len = 29*sizeof(uint8_t);
uint32_t ble_midi_data_io_value_update(ble_midi_service_t * p_midi_service, uint8_t data_io_value[29])
{
if (p_midi_service == NULL)
{
return NRF_ERROR_NULL;
}
uint32_t err_code = NRF_SUCCESS;
ble_gatts_value_t gatts_value;
// Initialize value struct.
memset(&gatts_value, 0, sizeof(gatts_value));
gatts_value.len = 29*sizeof(uint8_t);
gatts_value.offset = 0;
gatts_value.p_value = &data_io_value[0];
// Update database.
err_code = sd_ble_gatts_value_set(p_midi_service->conn_handle, p_midi_service->data_io_char_handles.value_handle, &gatts_value);
if (err_code != NRF_SUCCESS)
{
return err_code;
}
// Send value if connected and notifying.
if ((p_midi_service->conn_handle != BLE_CONN_HANDLE_INVALID))
{
ble_gatts_hvx_params_t hvx_params;
memset(&hvx_params, 0, sizeof(hvx_params));
hvx_params.handle = p_midi_service->data_io_char_handles.value_handle;
hvx_params.type = BLE_GATT_HVX_NOTIFICATION;
hvx_params.offset = gatts_value.offset;
hvx_params.p_len = &gatts_value.len;
hvx_params.p_data = gatts_value.p_value;
err_code = sd_ble_gatts_hvx(p_midi_service->conn_handle, &hvx_params);
NRF_LOG_INFO("sd_ble_gatts_hvx result: %x. \r\n", err_code);
}
else
{
err_code = NRF_ERROR_INVALID_STATE;
NRF_LOG_INFO("sd_ble_gatts_hvx result: NRF_ERROR_INVALID_STATE. \r\n");
}
return err_code;
}
Please guide what else do I need to add?
Could you provide the code where you initializes the characteristic?
The code before sd_ble_gatts_characteristic_add ().
-Amanda
/**@brief Function for adding the Data I/O characteristic. */
static uint32_t data_io_char_add(ble_midi_service_t * p_midi_service, const ble_midi_service_init_t * p_midi_service_init)
{
uint32_t err_code;
ble_gatts_char_md_t char_md;
ble_gatts_attr_md_t cccd_md;
ble_gatts_attr_t attr_char_value;
ble_uuid_t ble_uuid;
ble_gatts_attr_md_t attr_md;
// Configure the CCCD which is needed for Notifications and Indications
memset(&cccd_md, 0, sizeof(cccd_md));
BLE_GAP_CONN_SEC_MODE_SET_OPEN(&cccd_md.read_perm);
BLE_GAP_CONN_SEC_MODE_SET_OPEN(&cccd_md.write_perm);
cccd_md.vloc = BLE_GATTS_VLOC_STACK;
// Configure the characteristic metadata.
memset(&char_md, 0, sizeof(char_md));
char_md.char_props.read = 1;
char_md.char_props.write_wo_resp = 1;
char_md.char_props.notify = 1;
char_md.p_char_user_desc = NULL;
char_md.p_char_pf = NULL;
char_md.p_user_desc_md = NULL;
char_md.p_cccd_md = &cccd_md;
char_md.p_sccd_md = NULL;
// Add the MIDI Data I/O Characteristic UUID
ble_uuid128_t base_uuid = {BLE_UUID_MIDI_DATA_IO_CHAR_BASE_UUID};
err_code = sd_ble_uuid_vs_add(&base_uuid, &p_midi_service->uuid_type);
if (err_code != NRF_SUCCESS)
{
return err_code;
}
ble_uuid.type = p_midi_service->uuid_type;
ble_uuid.uuid = BLE_UUID_MIDI_DATA_IO_CHAR_UUID;
// Configure the characteristic value's metadata
memset(&attr_md, 0, sizeof(attr_md));
BLE_GAP_CONN_SEC_MODE_SET_OPEN(&attr_md.read_perm);
BLE_GAP_CONN_SEC_MODE_SET_OPEN(&attr_md.write_perm);
attr_md.vloc = BLE_GATTS_VLOC_STACK;
attr_md.rd_auth = 0;
attr_md.wr_auth = 0;
attr_md.vlen = 0;
// Configure the characteristic value
memset(&attr_char_value, 0, sizeof(attr_char_value));
attr_char_value.p_uuid = &ble_uuid;
attr_char_value.p_attr_md = &attr_md;
attr_char_value.init_len = sizeof(uint8_t);
attr_char_value.init_offs = 0;
attr_char_value.max_len = 29*sizeof(uint8_t);
attr_char_value.p_value = NULL;
return sd_ble_gatts_characteristic_add(p_midi_service->service_handle, &char_md, &attr_char_value, &p_midi_service->data_io_char_handles);
}
I am also attaching the full code for your reference. Please have a look.
Hi,
Change the Line 46 as
attr_char_value.init_len = 29*sizeof(uint8_t);
-Amanda
Hi Amanda, I'm still facing problems with all these changes. The bluetooth is getting disconnected. Please check my code. You can just search for /*NEW CHANGE*/ in my code to track the changes.
I could not trace the error.
Please help!!
Did you find anything?
Did you find anything?
We are enduring heavy loading because many colleagues are on vacation.
I will back your case soon. Thank you for your understanding.
-Amanda
Hi,
The attached file 230855_0537_ble_app_template.zip is modified as the last suggestion. It can work on my side.
-Amanda H.
No Amanda, its still disconnecting. Did you check on nrfconnect? I'm also trying to send 0x01 & 0x02 values to output characteristics.
Hi,
Yes, I tested with nRFconnect PC/mobile. It can read/write 29 bytes. If you enable the notification, it will disconnect immediately. You can refer to this https://devzone.nordicsemi.com/nordic/short-range-guides/b/bluetooth-low-energy/posts/ble-characteristics-a-beginners-tutorial to check the notification setting.
-Amanda H.
I added all the stuff as mentioned in the link above but still there are disconnections. Reattaching my newly modified files.
#include "sdk_common.h"
#include "ble_srv_common.h"
#include "ble_cus.h"
#include <string.h>
#include "nrf_gpio.h"
#include "boards.h"
#include "nrf_log.h"
/**@brief Function for handling the Connect event.
* @param[in] p_cus Custom Service structure.
* @param[in] p_ble_evt Event received from the BLE stack. */
static void on_connect(ble_cus_t * p_cus, ble_evt_t const * p_ble_evt)
{
p_cus->conn_handle = p_ble_evt->evt.gap_evt.conn_handle;
ble_cus_evt_t evt;
evt.evt_type = BLE_CUS_EVT_CONNECTED;
p_cus->evt_handler(p_cus, &evt);
}
/**@brief Function for handling the Disconnect event.
* @param[in] p_cus Custom Service structure.
* @param[in] p_ble_evt Event received from the BLE stack. */
static void on_disconnect(ble_cus_t * p_cus, ble_evt_t const * p_ble_evt)
{
UNUSED_PARAMETER(p_ble_evt);
p_cus->conn_handle = BLE_CONN_HANDLE_INVALID;
ble_cus_evt_t evt;
evt.evt_type = BLE_CUS_EVT_DISCONNECTED;
p_cus->evt_handler(p_cus, &evt);
}
/**@brief Function for handling the Write event.
* @param[in] p_cus Custom Service structure.
* @param[in] p_ble_evt Event received from the BLE stack. */
static void on_write(ble_cus_t * p_cus, ble_evt_t const * p_ble_evt)
{
ble_gatts_evt_write_t const * p_evt_write = &p_ble_evt->evt.gatts_evt.params.write;
// Custom Value Characteristic Written to.
if (p_evt_write->handle == p_cus->custom_value_handles.value_handle)
{
nrf_gpio_pin_toggle(LED_4);
NRF_LOG_INFO("GOT WRITE ON: %d",*p_evt_write->data);
if(*p_evt_write->data == 0x01)
{
nrf_gpio_pin_clear(LED_3);
}
else if(*p_evt_write->data == 0x02)
{
nrf_gpio_pin_set(LED_3);
}
else
{
//Do nothing
}
}
// Check if the Custom value CCCD is written to and that the value is the appropriate length, i.e 2 bytes.
if ((p_evt_write->handle == p_cus->custom_value_handles.cccd_handle) && (p_evt_write->len == 2))
{
// CCCD written, call application event handler
if (p_cus->evt_handler != NULL)
{
ble_cus_evt_t evt;
if (ble_srv_is_notification_enabled(p_evt_write->data))
{
evt.evt_type = BLE_CUS_EVT_NOTIFICATION_ENABLED;
}
else
{
evt.evt_type = BLE_CUS_EVT_NOTIFICATION_DISABLED;
}
// Call the application event handler.
p_cus->evt_handler(p_cus, &evt);
}
}
}
void ble_cus_on_ble_evt( ble_evt_t const * p_ble_evt, void * p_context)
{
ble_cus_t * p_cus = (ble_cus_t *) p_context;
NRF_LOG_INFO("BLE event received. Event type = %d\r\n", p_ble_evt->header.evt_id);
if (p_cus == NULL || p_ble_evt == NULL)
{
return;
}
switch (p_ble_evt->header.evt_id)
{
case BLE_GAP_EVT_CONNECTED:
on_connect(p_cus, p_ble_evt);
break;
case BLE_GAP_EVT_DISCONNECTED:
on_disconnect(p_cus, p_ble_evt);
break;
case BLE_GATTS_EVT_WRITE:
on_write(p_cus, p_ble_evt);
break;
/* Handling this event is not necessary
case BLE_GATTS_EVT_EXCHANGE_MTU_REQUEST:
NRF_LOG_INFO("EXCHANGE_MTU_REQUEST event received.\r\n");
break;*/
default:
// No implementation needed.
break;
}
}
/**@brief Function for adding the Custom Value characteristic.
* @param[in] p_cus Custom Service structure.
* @param[in] p_cus_init Information needed to initialize the service.
* @return NRF_SUCCESS on success, otherwise an error code. */
static uint32_t custom_value_char_add(ble_cus_t * p_cus, const ble_cus_init_t * p_cus_init)
{
uint32_t err_code;
ble_gatts_char_md_t char_md;
ble_gatts_attr_md_t cccd_md;
ble_gatts_attr_t attr_char_value;
ble_uuid_t ble_uuid;
ble_gatts_attr_md_t attr_md;
// Add Custom Value characteristic
memset(&cccd_md, 0, sizeof(cccd_md));
// Read operation on cccd should be possible without authentication.
BLE_GAP_CONN_SEC_MODE_SET_OPEN(&cccd_md.read_perm);
BLE_GAP_CONN_SEC_MODE_SET_OPEN(&cccd_md.write_perm);
cccd_md.write_perm = p_cus_init->custom_value_char_attr_md.cccd_write_perm;
cccd_md.vloc = BLE_GATTS_VLOC_STACK;
memset(&char_md, 0, sizeof(char_md));
char_md.char_props.read = 1;
char_md.char_props.write = 1;
char_md.char_props.notify = 1;
char_md.p_char_user_desc = NULL;
char_md.p_char_pf = NULL;
char_md.p_user_desc_md = NULL;
char_md.p_cccd_md = &cccd_md;
char_md.p_sccd_md = NULL;
ble_uuid.type = p_cus->uuid_type;
ble_uuid.uuid = CUSTOM_VALUE_CHAR_UUID;
memset(&attr_md, 0, sizeof(attr_md));
attr_md.read_perm = p_cus_init->custom_value_char_attr_md.read_perm;
attr_md.write_perm = p_cus_init->custom_value_char_attr_md.write_perm;
attr_md.vloc = BLE_GATTS_VLOC_STACK;
attr_md.rd_auth = 0;
attr_md.wr_auth = 0;
attr_md.vlen = 0;
memset(&attr_char_value, 0, sizeof(attr_char_value));
attr_char_value.p_uuid = &ble_uuid;
attr_char_value.p_attr_md = &attr_md;
attr_char_value.init_len = sizeof(uint8_t);
attr_char_value.init_offs = 0;
attr_char_value.max_len = sizeof(uint8_t);
err_code = sd_ble_gatts_characteristic_add(p_cus->service_handle, &char_md, &attr_char_value, &p_cus->custom_value_handles);
if (err_code != NRF_SUCCESS)
{
return err_code;
}
return NRF_SUCCESS;
}
uint32_t ble_cus_init(ble_cus_t * p_cus, const ble_cus_init_t * p_cus_init)
{
if (p_cus == NULL || p_cus_init == NULL)
{
return NRF_ERROR_NULL;
}
uint32_t err_code;
ble_uuid_t ble_uuid;
// Initialize service structure
p_cus->evt_handler = p_cus_init->evt_handler;
p_cus->conn_handle = BLE_CONN_HANDLE_INVALID;
// Add Custom Service UUID
ble_uuid128_t base_uuid = {CUSTOM_SERVICE_UUID_BASE};
err_code = sd_ble_uuid_vs_add(&base_uuid, &p_cus->uuid_type);
VERIFY_SUCCESS(err_code);
ble_uuid.type = p_cus->uuid_type;
ble_uuid.uuid = CUSTOM_SERVICE_UUID;
// Add the Custom Service
err_code = sd_ble_gatts_service_add(BLE_GATTS_SRVC_TYPE_PRIMARY, &ble_uuid, &p_cus->service_handle);
if (err_code != NRF_SUCCESS)
{
return err_code;
}
// Add Custom Value characteristic
return custom_value_char_add(p_cus, p_cus_init);
}
uint32_t ble_cus_custom_value_update(ble_cus_t * p_cus, uint8_t custom_value[20]) /*NEW CHANGE*/
{
NRF_LOG_INFO("In ble_cus_custom_value_update. \r\n");
if (p_cus == NULL)
{
return NRF_ERROR_NULL;
}
uint32_t err_code = NRF_SUCCESS;
ble_gatts_value_t gatts_value;
// Initialize value struct.
memset(&gatts_value, 0, sizeof(gatts_value));
gatts_value.len = 20*sizeof(uint8_t); /*NEW CHANGE*/
gatts_value.offset = 0;
gatts_value.p_value = &custom_value[0];
// Update database.
err_code = sd_ble_gatts_value_set(p_cus->conn_handle, p_cus->custom_value_handles.value_handle, &gatts_value);
if (err_code != NRF_SUCCESS)
{
return err_code;
}
// Send value if connected and notifying.
if ((p_cus->conn_handle != BLE_CONN_HANDLE_INVALID))
{
ble_gatts_hvx_params_t hvx_params;
memset(&hvx_params, 0, sizeof(hvx_params));
hvx_params.handle = p_cus->custom_value_handles.value_handle;
hvx_params.type = BLE_GATT_HVX_NOTIFICATION;
hvx_params.offset = gatts_value.offset;
hvx_params.p_len = &gatts_value.len;
hvx_params.p_data = gatts_value.p_value;
err_code = sd_ble_gatts_hvx(p_cus->conn_handle, &hvx_params);
NRF_LOG_INFO("sd_ble_gatts_hvx result: %x. \r\n", err_code);
}
else
{
err_code = NRF_ERROR_INVALID_STATE;
NRF_LOG_INFO("sd_ble_gatts_hvx result: NRF_ERROR_INVALID_STATE. \r\n");
}
return err_code;
}
/**
* Copyright (c) 2014 - 2018, 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.
*
*/
/** @file
*
* @defgroup ble_sdk_app_template_main main.c
* @{
* @ingroup ble_sdk_app_template
* @brief Template project main file.
*
* This file contains a template for creating a new application. It has the code necessary to wakeup
* from button, advertise, get a connection restart advertising on disconnect and if no new
* connection created go back to system-off mode.
* It can easily be used as a starting point for creating a new application, the comments identified
* with 'YOUR_JOB' indicates where and how you can customize.
*/
#include <stdbool.h>
#include <stdint.h>
#include <string.h>
#include "nordic_common.h"
#include "nrf.h"
#include "app_error.h"
#include "ble.h"
#include "ble_hci.h"
#include "ble_srv_common.h"
#include "ble_advdata.h"
#include "ble_advertising.h"
#include "ble_conn_params.h"
#include "nrf_sdh.h"
#include "nrf_sdh_soc.h"
#include "nrf_sdh_ble.h"
#include "app_timer.h"
#include "fds.h"
#include "peer_manager.h"
#include "peer_manager_handler.h"
#include "bsp_btn_ble.h"
#include "sensorsim.h"
#include "ble_conn_state.h"
#include "nrf_ble_gatt.h"
#include "nrf_ble_qwr.h"
#include "nrf_pwr_mgmt.h"
#include "nrf_log.h"
#include "nrf_log_ctrl.h"
#include "nrf_log_default_backends.h"
/*new*/
#include "ble_cus.h"
#define DEVICE_NAME "Sonal" /**< Name of device. Will be included in the advertising data. */
#define MANUFACTURER_NAME "NordicSemiconductor" /**< Manufacturer. Will be passed to Device Information Service. */
#define APP_ADV_INTERVAL 300 /**< The advertising interval (in units of 0.625 ms. This value corresponds to 187.5 ms). */
#define APP_ADV_DURATION 18000 /**< The advertising duration (180 seconds) in units of 10 milliseconds. */
#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 MIN_CONN_INTERVAL MSEC_TO_UNITS(100, UNIT_1_25_MS) /**< Minimum acceptable connection interval (0.1 seconds). */
#define MAX_CONN_INTERVAL MSEC_TO_UNITS(200, UNIT_1_25_MS) /**< Maximum acceptable connection interval (0.2 second). */
#define SLAVE_LATENCY 0 /**< Slave latency. */
#define CONN_SUP_TIMEOUT MSEC_TO_UNITS(4000, UNIT_10_MS) /**< Connection supervisory timeout (4 seconds). */
#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. */
/*new*/
#define NOTIFICATION_INTERVAL APP_TIMER_TICKS(100)
#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 DEAD_BEEF 0xDEADBEEF /**< Value used as error code on stack dump, can be used to identify stack location on stack unwind. */
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. */
/*new*/
BLE_CUS_DEF(m_cus);
APP_TIMER_DEF(m_notification_timer_id);
/*NEW CHANGE*/
static uint8_t m_custom_value[20];
static uint16_t m_conn_handle = BLE_CONN_HANDLE_INVALID; /**< Handle of the current connection. */
/* YOUR_JOB: Declare all services structure your application is using
* BLE_XYZ_DEF(m_xyz);
*/
// YOUR_JOB: Use UUIDs for service(s) used in your application.
/*static ble_uuid_t m_adv_uuids[] = /**< Universally unique service identifiers. */
/*{
{BLE_UUID_DEVICE_INFORMATION_SERVICE, BLE_UUID_TYPE_BLE}
};*/
/*new*/
ble_uuid_t m_adv_uuids[] = {{CUSTOM_SERVICE_UUID, BLE_UUID_TYPE_VENDOR_BEGIN }}; /**< Universally unique service identifiers. */
static void advertising_start(bool erase_bonds);
/**@brief Callback 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] 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 handling Peer Manager events.
*
* @param[in] p_evt Peer Manager event.
*/
static void pm_evt_handler(pm_evt_t const * p_evt)
{
ret_code_t err_code;
//pm_handler_on_pm_evt(p_evt);
//pm_handler_flash_clean(p_evt);
switch (p_evt->evt_id)
{
case PM_EVT_BONDED_PEER_CONNECTED:
{
NRF_LOG_INFO("Connected to a previously bonded device.");
} break;
case PM_EVT_CONN_SEC_SUCCEEDED:
{
NRF_LOG_INFO("Connection secured: role: %d, conn_handle: 0x%x, procedure: %d.", ble_conn_state_role(p_evt->conn_handle),
p_evt->conn_handle, p_evt->params.conn_sec_succeeded.procedure);
} break;
case PM_EVT_CONN_SEC_FAILED:
{
/* Often, when securing fails, it shouldn't be restarted, for security reasons. Other times, it can be restarted directly.
* Sometimes it can be restarted, but only after changing some Security Parameters. Sometimes, it cannot be restarted until the link is disconnected and reconnected.
* Sometimes it is impossible, to secure the link, or the peer device does not support it. How to handle this error is highly application dependent. */
} break;
case PM_EVT_CONN_SEC_CONFIG_REQ:
{
// Reject pairing request from an already bonded peer.
pm_conn_sec_config_t conn_sec_config = {.allow_repairing = false};
pm_conn_sec_config_reply(p_evt->conn_handle, &conn_sec_config);
} break;
case PM_EVT_STORAGE_FULL:
{
// Run garbage collection on the flash.
err_code = fds_gc();
if (err_code == FDS_ERR_NO_SPACE_IN_QUEUES)
{
// Retry.
}
else
{
APP_ERROR_CHECK(err_code);
}
} break;
case PM_EVT_PEERS_DELETE_SUCCEEDED:
advertising_start(false);
break;
case PM_EVT_PEER_DATA_UPDATE_FAILED:
{
// Assert.
APP_ERROR_CHECK(p_evt->params.peer_data_update_failed.error);
} break;
case PM_EVT_PEER_DELETE_FAILED:
{
// Assert.
APP_ERROR_CHECK(p_evt->params.peer_delete_failed.error);
} break;
case PM_EVT_PEERS_DELETE_FAILED:
{
// Assert.
APP_ERROR_CHECK(p_evt->params.peers_delete_failed_evt.error);
} break;
case PM_EVT_ERROR_UNEXPECTED:
{
// Assert.
APP_ERROR_CHECK(p_evt->params.error_unexpected.error);
} break;
case PM_EVT_CONN_SEC_START:
case PM_EVT_PEER_DATA_UPDATE_SUCCEEDED:
case PM_EVT_PEER_DELETE_SUCCEEDED:
case PM_EVT_LOCAL_DB_CACHE_APPLIED:
case PM_EVT_LOCAL_DB_CACHE_APPLY_FAILED:
// This can happen when the local DB has changed.
case PM_EVT_SERVICE_CHANGED_IND_SENT:
case PM_EVT_SERVICE_CHANGED_IND_CONFIRMED:
default:
break;
}
}
/**@brief Function for handling the Battery measurement timer timeout.
* @details This function will be called each time the battery level measurement timer expires.
* @param[in] p_context Pointer used for passing some arbitrary information (context) from the app_start_timer() call to the timeout handler. */
static void notification_timeout_handler(void * p_context)
{
UNUSED_PARAMETER(p_context);
ret_code_t err_code;
// Increment the value of m_custom_value before nortifing it.
m_custom_value[0] = 1;
m_custom_value[1] = 2;
m_custom_value[2] = 3;
m_custom_value[3] = 4;
m_custom_value[4] = 5;
m_custom_value[5] = 6;
m_custom_value[6] = 7;
m_custom_value[7] = 8;
m_custom_value[8] = 9;
m_custom_value[9] = 10;
m_custom_value[10] = 11;
m_custom_value[11] = 12;
m_custom_value[12] = 13;
m_custom_value[13] = 14;
m_custom_value[14] = 15;
m_custom_value[15] = 16;
m_custom_value[16] = 17;
m_custom_value[17] = 18;
m_custom_value[18] = 19;
m_custom_value[19] = 20;
err_code = ble_cus_custom_value_update(&m_cus, &m_custom_value[0]); /*NEW CHANGE*/
APP_ERROR_CHECK(err_code);
}
/**@brief Function for the Timer initialization.
*
* @details Initializes the timer module. This creates and starts application timers.
*/
static void timers_init(void)
{
// Initialize timer module.
ret_code_t err_code = app_timer_init();
APP_ERROR_CHECK(err_code);
// Create timers.
err_code = app_timer_create(&m_notification_timer_id, APP_TIMER_MODE_REPEATED, notification_timeout_handler);
APP_ERROR_CHECK(err_code);
/* YOUR_JOB: Create any timers to be used by the application.
Below is an example of how to create a timer.
For every new timer needed, increase the value of the macro APP_TIMER_MAX_TIMERS by
one.
ret_code_t err_code;
err_code = app_timer_create(&m_app_timer_id, APP_TIMER_MODE_REPEATED, timer_timeout_handler);
APP_ERROR_CHECK(err_code); */
}
/**@brief Function for the GAP initialization.
*
* @details This function sets up all the necessary GAP (Generic Access Profile) parameters of the
* device including the device name, appearance, and the preferred connection parameters.
*/
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);
/* YOUR_JOB: Use an appearance value matching the application's use case.
err_code = sd_ble_gap_appearance_set(BLE_APPEARANCE_);
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 initializing the GATT module.
*/
static void gatt_init(void)
{
ret_code_t err_code = nrf_ble_gatt_init(&m_gatt, NULL);
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 YYY Service events.
* YOUR_JOB implement a service handler function depending on the event the service you are using can generate
*
* @details This function will be called for all YY Service events which are passed to
* the application.
*
* @param[in] p_yy_service YY Service structure.
* @param[in] p_evt Event received from the YY Service.
*
*
static void on_yys_evt(ble_yy_service_t * p_yy_service,
ble_yy_service_evt_t * p_evt)
{
switch (p_evt->evt_type)
{
case BLE_YY_NAME_EVT_WRITE:
APPL_LOG("[APPL]: charact written with value %s. ", p_evt->params.char_xx.value.p_str);
break;
default:
// No implementation needed.
break;
}
}*/
/**@brief Function for handling the Custom Service Service events.
* @details This function will be called for all Custom Service events which are passed to the application.
* @param[in] p_cus_service Custom Service structure.
* @param[in] p_evt Event received from the Custom Service. */
static void on_cus_evt(ble_cus_t * p_cus_service, ble_cus_evt_t * p_evt)
{
ret_code_t err_code;
switch(p_evt->evt_type)
{
case BLE_CUS_EVT_NOTIFICATION_ENABLED:
err_code = app_timer_start(m_notification_timer_id, NOTIFICATION_INTERVAL, NULL);
APP_ERROR_CHECK(err_code);
break;
case BLE_CUS_EVT_NOTIFICATION_DISABLED:
err_code = app_timer_stop(m_notification_timer_id);
APP_ERROR_CHECK(err_code);
break;
case BLE_CUS_EVT_CONNECTED:
break;
case BLE_CUS_EVT_DISCONNECTED:
break;
default:
// No implementation needed.
break;
}
}
/**@brief Function for initializing services that will be used by the application.
*/
static void services_init(void)
{
ret_code_t err_code;
nrf_ble_qwr_init_t qwr_init = {0};
ble_cus_init_t cus_init = {0};/*new*/
// 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 CUS Service init structure to zero.
cus_init.evt_handler = on_cus_evt;
BLE_GAP_CONN_SEC_MODE_SET_OPEN(&cus_init.custom_value_char_attr_md.cccd_write_perm);
BLE_GAP_CONN_SEC_MODE_SET_OPEN(&cus_init.custom_value_char_attr_md.read_perm);
BLE_GAP_CONN_SEC_MODE_SET_OPEN(&cus_init.custom_value_char_attr_md.write_perm);
err_code = ble_cus_init(&m_cus, &cus_init);
APP_ERROR_CHECK(err_code);
}
/**@brief Function for handling 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)
{
ret_code_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 a Connection Parameters error.
*
* @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)
{
ret_code_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 starting timers.
*/
static void application_timers_start(void)
{
/* YOUR_JOB: Start your timers. below is an example of how to start a timer.
ret_code_t err_code;
err_code = app_timer_start(m_app_timer_id, TIMER_INTERVAL, NULL);
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)
{
ret_code_t err_code;
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)
{
ret_code_t err_code;
switch (ble_adv_evt)
{
case BLE_ADV_EVT_FAST:
NRF_LOG_INFO("Fast advertising.");
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;
}
}
/**@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)
{
ret_code_t err_code = NRF_SUCCESS;
switch (p_ble_evt->header.evt_id)
{
case BLE_GAP_EVT_DISCONNECTED:
NRF_LOG_INFO("Disconnected.");
// LED indication will be changed when advertising starts.
break;
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_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_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 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);
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 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 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 handling events from the BSP module.
*
* @param[in] event Event generated when button is pressed.
*/
static void bsp_event_handler(bsp_event_t event)
{
ret_code_t err_code;
switch (event)
{
case BSP_EVENT_SLEEP:
sleep_mode_enter();
break; // BSP_EVENT_SLEEP
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; // BSP_EVENT_DISCONNECT
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; // BSP_EVENT_KEY_0
default:
break;
}
}
/**@brief Function for initializing the Advertising functionality.
*/
static void advertising_init(void)
{
ret_code_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 = true;
init.advdata.flags = BLE_GAP_ADV_FLAGS_LE_ONLY_GENERAL_DISC_MODE;
init.advdata.uuids_complete.uuid_cnt = sizeof(m_adv_uuids) / sizeof(m_adv_uuids[0]);
init.advdata.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);
}
/**@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 power management.
*/
static void power_management_init(void)
{
ret_code_t err_code;
err_code = nrf_pwr_mgmt_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 Function for starting advertising.
*/
static void advertising_start(bool erase_bonds)
{
if (erase_bonds == true)
{
delete_bonds();
// Advertising is started by PM_EVT_PEERS_DELETED_SUCEEDED event
}
else
{
ret_code_t err_code = ble_advertising_start(&m_advertising, BLE_ADV_MODE_FAST);
APP_ERROR_CHECK(err_code);
}
}
/**@brief Function for application main entry.
*/
int main(void)
{
bool erase_bonds;
// Initialize.
log_init();
timers_init();
buttons_leds_init(&erase_bonds);
power_management_init();
ble_stack_init();
gap_params_init();
gatt_init();
services_init(); /*new*/
advertising_init();
//services_init();
conn_params_init();
peer_manager_init();
// Start execution.
NRF_LOG_INFO("Template example started.");
application_timers_start();
advertising_start(erase_bonds);
// Enter main loop.
for (;;)
{
idle_state_handle();
}
}
/**
* @}
*/