Hi All,
I am new and trying to connect External BLE Pressure Sensor to NRF52840-DK Board
Do you have any example code for interfacing external BLE sensors that I can refer ?
What you suggest to start with .?
Hi All,
I am new and trying to connect External BLE Pressure Sensor to NRF52840-DK Board
Do you have any example code for interfacing external BLE sensors that I can refer ?
What you suggest to start with .?
/**
* Copyright (c) 2012 - 2020, Nordic Semiconductor ASA
*
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without modification,
* are permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright notice, this
* list of conditions and the following disclaimer.
*
* 2. Redistributions in binary form, except as embedded into a Nordic
* Semiconductor ASA integrated circuit in a product or a software update for
* such product, must reproduce the above copyright notice, this list of
* conditions and the following disclaimer in the documentation and/or other
* materials provided with the distribution.
*
* 3. Neither the name of Nordic Semiconductor ASA nor the names of its
* contributors may be used to endorse or promote products derived from this
* software without specific prior written permission.
*
* 4. This software, with or without modification, must only be used with a
* Nordic Semiconductor ASA integrated circuit.
*
* 5. Any software provided in binary form under this license must not be reverse
* engineered, decompiled, modified and/or disassembled.
*
* THIS SOFTWARE IS PROVIDED BY NORDIC SEMICONDUCTOR ASA "AS IS" AND ANY EXPRESS
* OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY, NONINFRINGEMENT, AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL NORDIC SEMICONDUCTOR ASA OR CONTRIBUTORS BE
* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE
* GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
* OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
*/
#include "sdk_common.h"
#if NRF_MODULE_ENABLED(BLE_BAS_C)
#include "ble_bas_c.h"
#include "ble_types.h"
#include "ble_db_discovery.h"
#include "ble_gattc.h"
#define NRF_LOG_MODULE_NAME ble_bas_c
#include "nrf_log.h"
NRF_LOG_MODULE_REGISTER();
/**@brief Function for intercepting errors of GATTC and BLE GATT Queue.
*
* @param[in] nrf_error Error code.
* @param[in] p_ctx Parameter from the event handler.
* @param[in] conn_handle Connection handle.
*/
static void gatt_error_handler(uint32_t nrf_error,
void * p_ctx,
uint16_t conn_handle)
{
ble_bas_c_t * p_bas_c = (ble_bas_c_t *)p_ctx;
NRF_LOG_DEBUG("A GATT Client error has occurred on conn_handle: 0X%X", conn_handle);
if (p_bas_c->error_handler != NULL)
{
p_bas_c->error_handler(nrf_error);
}
}
/**@brief Function for handling read response events.
*
* @details This function validates the read response and raises the appropriate
* event to the application.
*
* @param[in] p_bas_c Pointer to the Battery Service Client Structure.
* @param[in] p_ble_evt Pointer to the SoftDevice event.
*/
static void on_read_rsp(ble_bas_c_t * p_bas_c, ble_evt_t const * p_ble_evt)
{
const ble_gattc_evt_read_rsp_t * p_response;
// Check if the event is on the link for this instance.
if (p_bas_c->conn_handle != p_ble_evt->evt.gattc_evt.conn_handle)
{
return;
}
p_response = &p_ble_evt->evt.gattc_evt.params.read_rsp;
if (p_response->handle == p_bas_c->peer_bas_db.bl_handle)
{
ble_bas_c_evt_t evt;
evt.conn_handle = p_ble_evt->evt.gattc_evt.conn_handle;
evt.evt_type = BLE_BAS_C_EVT_BATT_READ_RESP;
evt.params.battery_level = p_response->data[0];
p_bas_c->evt_handler(p_bas_c, &evt);
}
}
/**@brief Function for handling Handle Value Notification received from the SoftDevice.
*
* @details This function handles the Handle Value Notification received from the SoftDevice
* and checks whether it is a notification of the Battery Level measurement from the peer. If
* it is, this function decodes the battery level measurement and sends it to the
* application.
*
* @param[in] p_ble_bas_c Pointer to the Battery Service Client structure.
* @param[in] p_ble_evt Pointer to the BLE event received.
*/
static void on_hvx(ble_bas_c_t * p_ble_bas_c, ble_evt_t const * p_ble_evt)
{
// Check if the event is on the link for this instance.
if (p_ble_bas_c->conn_handle != p_ble_evt->evt.gattc_evt.conn_handle)
{
return;
}
// Check if this notification is a battery level notification.
if (p_ble_evt->evt.gattc_evt.params.hvx.handle == p_ble_bas_c->peer_bas_db.bl_handle)
{
if (p_ble_evt->evt.gattc_evt.params.hvx.len == 1)
{
ble_bas_c_evt_t ble_bas_c_evt;
ble_bas_c_evt.conn_handle = p_ble_evt->evt.gattc_evt.conn_handle;
ble_bas_c_evt.evt_type = BLE_BAS_C_EVT_BATT_NOTIFICATION;
ble_bas_c_evt.params.battery_level = p_ble_evt->evt.gattc_evt.params.hvx.data[0];
p_ble_bas_c->evt_handler(p_ble_bas_c, &ble_bas_c_evt);
}
}
}
void ble_bas_on_db_disc_evt(ble_bas_c_t * p_ble_bas_c, const ble_db_discovery_evt_t * p_evt)
{
// NRF_LOG_INFO("Entering into the ble_bas_on_db_disc_evt");
// Check if the Battery Service was discovered.
if (p_evt->evt_type == BLE_DB_DISCOVERY_COMPLETE
&&
p_evt->params.discovered_db.srv_uuid.uuid == BLE_UUID_BATTERY_SERVICE
&&
p_evt->params.discovered_db.srv_uuid.type == BLE_UUID_TYPE_BLE)
{
// Find the CCCD Handle of the Battery Level characteristic.
uint8_t i;
ble_bas_c_evt_t evt;
evt.evt_type = BLE_BAS_C_EVT_DISCOVERY_COMPLETE;
evt.conn_handle = p_evt->conn_handle;
for (i = 0; i < p_evt->params.discovered_db.char_count; i++)
{
if (p_evt->params.discovered_db.charateristics[i].characteristic.uuid.uuid ==
BLE_UUID_BATTERY_LEVEL_CHAR)
{
// Found Battery Level characteristic. Store CCCD handle and break.
evt.params.bas_db.bl_cccd_handle =
p_evt->params.discovered_db.charateristics[i].cccd_handle;
evt.params.bas_db.bl_handle =
p_evt->params.discovered_db.charateristics[i].characteristic.handle_value;
break;
}
}
NRF_LOG_INFO("Battery Service discovered at peer.");
//If the instance has been assigned prior to db_discovery, assign the db_handles.
if (p_ble_bas_c->conn_handle != BLE_CONN_HANDLE_INVALID)
{
if ((p_ble_bas_c->peer_bas_db.bl_cccd_handle == BLE_GATT_HANDLE_INVALID)&&
(p_ble_bas_c->peer_bas_db.bl_handle == BLE_GATT_HANDLE_INVALID))
{
p_ble_bas_c->peer_bas_db = evt.params.bas_db;
}
}
p_ble_bas_c->evt_handler(p_ble_bas_c, &evt);
}
else if (p_evt->evt_type == BLE_DB_DISCOVERY_SRV_NOT_FOUND)
{
NRF_LOG_INFO("BLE_DB_DISCOVERY_SRV_NOT_FOUND");
NRF_LOG_DEBUG("Battery Service discovery failure at peer. ");
}
else if (p_evt->evt_type == BLE_DB_DISCOVERY_ERROR)
{
NRF_LOG_INFO("BLE_DB_DISCOVERY_ERROR");
NRF_LOG_DEBUG("Battery Service discovery failure at peer. ");
}
else if (p_evt->evt_type == BLE_DB_DISCOVERY_COMPLETE)
{
NRF_LOG_INFO("BLE_DB_DISCOVERY_COMPLETE");
}
else
{
// Do nothing.
}
}
/**@brief Function for creating a message for writing to the CCCD.
*/
static uint32_t cccd_configure(ble_bas_c_t * p_ble_bas_c, bool notification_enable)
{
NRF_LOG_DEBUG("Configuring CCCD. CCCD Handle = %d, Connection Handle = %d",
p_ble_bas_c->peer_bas_db.bl_cccd_handle,
p_ble_bas_c->conn_handle);
nrf_ble_gq_req_t bas_c_req;
uint8_t cccd[BLE_CCCD_VALUE_LEN];
uint16_t cccd_val = notification_enable ? BLE_GATT_HVX_NOTIFICATION : 0;
cccd[0] = LSB_16(cccd_val);
cccd[1] = MSB_16(cccd_val);
memset(&bas_c_req, 0, sizeof(bas_c_req));
bas_c_req.type = NRF_BLE_GQ_REQ_GATTC_WRITE;
bas_c_req.error_handler.cb = gatt_error_handler;
bas_c_req.error_handler.p_ctx = p_ble_bas_c;
bas_c_req.params.gattc_write.handle = p_ble_bas_c->peer_bas_db.bl_cccd_handle;
bas_c_req.params.gattc_write.len = BLE_CCCD_VALUE_LEN;
bas_c_req.params.gattc_write.p_value = cccd;
bas_c_req.params.gattc_write.offset = 0;
bas_c_req.params.gattc_write.write_op = BLE_GATT_OP_WRITE_REQ;
return nrf_ble_gq_item_add(p_ble_bas_c->p_gatt_queue, &bas_c_req, p_ble_bas_c->conn_handle);
}
uint32_t ble_bas_c_init(ble_bas_c_t * p_ble_bas_c, ble_bas_c_init_t * p_ble_bas_c_init)
{
VERIFY_PARAM_NOT_NULL(p_ble_bas_c);
VERIFY_PARAM_NOT_NULL(p_ble_bas_c_init);
ble_uuid_t bas_uuid;
bas_uuid.type = BLE_UUID_TYPE_BLE;
bas_uuid.uuid = BLE_UUID_BATTERY_SERVICE;
p_ble_bas_c->conn_handle = BLE_CONN_HANDLE_INVALID;
p_ble_bas_c->peer_bas_db.bl_cccd_handle = BLE_GATT_HANDLE_INVALID;
p_ble_bas_c->peer_bas_db.bl_handle = BLE_GATT_HANDLE_INVALID;
p_ble_bas_c->evt_handler = p_ble_bas_c_init->evt_handler;
p_ble_bas_c->error_handler = p_ble_bas_c_init->error_handler;
p_ble_bas_c->p_gatt_queue = p_ble_bas_c_init->p_gatt_queue;
return ble_db_discovery_evt_register(&bas_uuid);
}
/**@brief Function for handling the Disconnected event received from the SoftDevice.
*
* @details This function checks whether the disconnect event is happening on the link
* associated with the current instance of the module. If the event is happening,
* the function sets the instance's conn_handle to invalid.
*
* @param[in] p_ble_bas_c Pointer to the Battery Service Client structure.
* @param[in] p_ble_evt Pointer to the BLE event received.
*/
static void on_disconnected(ble_bas_c_t * p_ble_bas_c, const ble_evt_t * p_ble_evt)
{
if (p_ble_bas_c->conn_handle == p_ble_evt->evt.gap_evt.conn_handle)
{
p_ble_bas_c->conn_handle = BLE_CONN_HANDLE_INVALID;
p_ble_bas_c->peer_bas_db.bl_cccd_handle = BLE_GATT_HANDLE_INVALID;
p_ble_bas_c->peer_bas_db.bl_handle = BLE_GATT_HANDLE_INVALID;
}
}
void ble_bas_c_on_ble_evt(ble_evt_t const * p_ble_evt, void * p_context)
{
if ((p_ble_evt == NULL) || (p_context == NULL))
{
return;
}
ble_bas_c_t * p_ble_bas_c = (ble_bas_c_t *)p_context;
switch (p_ble_evt->header.evt_id)
{
case BLE_GATTC_EVT_HVX:
on_hvx(p_ble_bas_c, p_ble_evt);
break;
case BLE_GATTC_EVT_READ_RSP:
on_read_rsp(p_ble_bas_c, p_ble_evt);
break;
case BLE_GAP_EVT_DISCONNECTED:
on_disconnected(p_ble_bas_c, p_ble_evt);
break;
default:
break;
}
}
uint32_t ble_bas_c_bl_notif_enable(ble_bas_c_t * p_ble_bas_c)
{
VERIFY_PARAM_NOT_NULL(p_ble_bas_c);
if (p_ble_bas_c->conn_handle == BLE_CONN_HANDLE_INVALID)
{
return NRF_ERROR_INVALID_STATE;
}
return cccd_configure(p_ble_bas_c, true);
}
uint32_t ble_bas_c_bl_read(ble_bas_c_t * p_ble_bas_c)
{
VERIFY_PARAM_NOT_NULL(p_ble_bas_c);
if (p_ble_bas_c->conn_handle == BLE_CONN_HANDLE_INVALID)
{
return NRF_ERROR_INVALID_STATE;
}
nrf_ble_gq_req_t bas_c_req;
memset(&bas_c_req, 0, sizeof(bas_c_req));
bas_c_req.type = NRF_BLE_GQ_REQ_GATTC_READ;
bas_c_req.error_handler.cb = gatt_error_handler;
bas_c_req.error_handler.p_ctx = p_ble_bas_c;
bas_c_req.params.gattc_read.handle = p_ble_bas_c->peer_bas_db.bl_handle;
return nrf_ble_gq_item_add(p_ble_bas_c->p_gatt_queue, &bas_c_req, p_ble_bas_c->conn_handle);
}
uint32_t ble_bas_c_handles_assign(ble_bas_c_t * p_ble_bas_c,
uint16_t conn_handle,
ble_bas_c_db_t * p_peer_handles)
{
VERIFY_PARAM_NOT_NULL(p_ble_bas_c);
p_ble_bas_c->conn_handle = conn_handle;
if (p_peer_handles != NULL)
{
p_ble_bas_c->peer_bas_db = *p_peer_handles;
}
return nrf_ble_gq_conn_handle_register(p_ble_bas_c->p_gatt_queue, conn_handle);
}
#endif // NRF_MODULE_ENABLED(BLE_BAS_C)
/**
* Copyright (c) 2014 - 2020, Nordic Semiconductor ASA
*
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without modification,
* are permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright notice, this
* list of conditions and the following disclaimer.
*
* 2. Redistributions in binary form, except as embedded into a Nordic
* Semiconductor ASA integrated circuit in a product or a software update for
* such product, must reproduce the above copyright notice, this list of
* conditions and the following disclaimer in the documentation and/or other
* materials provided with the distribution.
*
* 3. Neither the name of Nordic Semiconductor ASA nor the names of its
* contributors may be used to endorse or promote products derived from this
* software without specific prior written permission.
*
* 4. This software, with or without modification, must only be used with a
* Nordic Semiconductor ASA integrated circuit.
*
* 5. Any software provided in binary form under this license must not be reverse
* engineered, decompiled, modified and/or disassembled.
*
* THIS SOFTWARE IS PROVIDED BY NORDIC SEMICONDUCTOR ASA "AS IS" AND ANY EXPRESS
* OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY, NONINFRINGEMENT, AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL NORDIC SEMICONDUCTOR ASA OR CONTRIBUTORS BE
* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE
* GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
* OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
*/
/**
* @brief BLE Heart Rate Collector application main file.
*
* This file contains the source code for a sample heart rate collector.
*/
#include <stdint.h>
#include <stdio.h>
#include <string.h>
#include "nordic_common.h"
#include "nrf_sdm.h"
#include "ble.h"
#include "ble_hci.h"
#include "ble_db_discovery.h"
#include "ble_srv_common.h"
#include "nrf_sdh.h"
#include "nrf_sdh_ble.h"
#include "nrf_sdh_soc.h"
#include "nrf_pwr_mgmt.h"
#include "app_util.h"
#include "app_error.h"
#include "peer_manager.h"
#include "peer_manager_handler.h"
#include "ble_hrs_c.h"
#include "ble_bas_c.h"
#include "app_util.h"
#include "app_timer.h"
#include "bsp_btn_ble.h"
#include "fds.h"
#include "nrf_fstorage.h"
#include "ble_conn_state.h"
#include "nrf_ble_gatt.h"
#include "nrf_ble_lesc.h"
#include "nrf_log.h"
#include "nrf_log_ctrl.h"
#include "nrf_log_default_backends.h"
#include "nrf_ble_scan.h"
#define APP_BLE_CONN_CFG_TAG 1 /**< A tag identifying the SoftDevice BLE configuration. */
#define APP_BLE_OBSERVER_PRIO 3 /**< Application's BLE observer priority. You shouldn't need to modify this value. */
#define APP_SOC_OBSERVER_PRIO 1 /**< Applications' SoC observer priority. You shouldn't need to modify this value. */
#define LESC_DEBUG_MODE 0 /**< Set to 1 to use LESC debug keys, allows you to use a sniffer to inspect traffic. */
#define SEC_PARAM_BOND 1 /**< Perform bonding. */
#define SEC_PARAM_MITM 0 /**< Man In The Middle protection not required. */
#define SEC_PARAM_LESC 1 /**< LE Secure Connections enabled. */
#define SEC_PARAM_KEYPRESS 0 /**< Keypress notifications not enabled. */
#define SEC_PARAM_IO_CAPABILITIES BLE_GAP_IO_CAPS_NONE /**< No I/O capabilities. */
#define SEC_PARAM_OOB 0 /**< Out Of Band data not available. */
#define SEC_PARAM_MIN_KEY_SIZE 7 /**< Minimum encryption key size in octets. */
#define SEC_PARAM_MAX_KEY_SIZE 16 /**< Maximum encryption key size in octets. */
#define SCAN_DURATION_WITELIST 3000 /**< Duration of the scanning in units of 10 milliseconds. */
#define TARGET_UUID BLE_UUID_HEART_RATE_SERVICE /**< Target device uuid that application is looking for. */
/**@brief Macro to unpack 16bit unsigned UUID from octet stream. */
#define UUID16_EXTRACT(DST, SRC) \
do \
{ \
(*(DST)) = (SRC)[1]; \
(*(DST)) <<= 8; \
(*(DST)) |= (SRC)[0]; \
} while (0)
NRF_BLE_GQ_DEF(m_ble_gatt_queue, /**< BLE GATT Queue instance. */
NRF_SDH_BLE_CENTRAL_LINK_COUNT,
NRF_BLE_GQ_QUEUE_SIZE);
BLE_HRS_C_DEF(m_hrs_c); /**< Structure used to identify the heart rate client module. */
BLE_BAS_C_DEF(m_bas_c); /**< Structure used to identify the Battery Service client module. */
NRF_BLE_GATT_DEF(m_gatt); /**< GATT module instance. */
BLE_DB_DISCOVERY_DEF(m_db_disc); /**< DB discovery module instance. */
NRF_BLE_SCAN_DEF(m_scan); /**< Scanning module instance. */
static uint16_t m_conn_handle; /**< Current connection handle. */
static bool m_whitelist_disabled; /**< True if whitelist has been temporarily disabled. */
static bool m_memory_access_in_progress; /**< Flag to keep track of ongoing operations on persistent memory. */
/**< Scan parameters requested for scanning and connection. */
static ble_gap_scan_params_t const m_scan_param =
{
.active = 0x01,
#if (NRF_SD_BLE_API_VERSION > 7)
.interval_us = NRF_BLE_SCAN_SCAN_INTERVAL * UNIT_0_625_MS,
.window_us = NRF_BLE_SCAN_SCAN_WINDOW * UNIT_0_625_MS,
#else
.interval = NRF_BLE_SCAN_SCAN_INTERVAL,
.window = NRF_BLE_SCAN_SCAN_WINDOW,
#endif // (NRF_SD_BLE_API_VERSION > 7)
.filter_policy = BLE_GAP_SCAN_FP_WHITELIST,
.timeout = SCAN_DURATION_WITELIST,
.scan_phys = BLE_GAP_PHY_1MBPS,
};
/**@brief Names which the central applications will scan for, and which will be advertised by the peripherals.
* if these are set to empty strings, the UUIDs defined below will be used
*/
static char const m_target_periph_name[] = ""; /**< If you want to connect to a peripheral using a given advertising name, type its name here. */
static bool is_connect_per_addr = false; /**< If you want to connect to a peripheral with a given address, set this to true and put the correct address in the variable below. */
static ble_gap_addr_t const m_target_periph_addr =
{
/* Possible values for addr_type:
BLE_GAP_ADDR_TYPE_PUBLIC,
BLE_GAP_ADDR_TYPE_RANDOM_STATIC,
BLE_GAP_ADDR_TYPE_RANDOM_PRIVATE_RESOLVABLE,
BLE_GAP_ADDR_TYPE_RANDOM_PRIVATE_NON_RESOLVABLE. */
.addr_type = BLE_GAP_ADDR_TYPE_RANDOM_STATIC,
.addr = {0x8D, 0xFE, 0x23, 0x86, 0x77, 0xD9}
};
static void scan_start(void);
/**@brief Function for asserts in the SoftDevice.
*
* @details This function will be called in case of an assert in the SoftDevice.
*
* @warning This handler is an example only and does not fit a final product. You need to analyze
* how your product is supposed to react in case of Assert.
* @warning On assert from the SoftDevice, the system can only recover on reset.
*
* @param[in] line_num Line number of the failing ASSERT call.
* @param[in] p_file_name File name of the failing ASSERT call.
*/
void assert_nrf_callback(uint16_t line_num, const uint8_t * p_file_name)
{
app_error_handler(0xDEADBEEF, line_num, p_file_name);
}
/**@brief Function for handling the Heart Rate Service Client and Battery Service Client errors.
*
* @param[in] nrf_error Error code containing information about what went wrong.
*/
static void service_error_handler(uint32_t nrf_error)
{
APP_ERROR_HANDLER(nrf_error);
}
/**@brief Function for handling database discovery events.
*
* @details This function is callback function to handle events from the database discovery module.
* Depending on the UUIDs that are discovered, this function should forward the events
* to their respective services.
*
* @param[in] p_event Pointer to the database discovery event.
*/
static void db_disc_handler(ble_db_discovery_evt_t * p_evt)
{
ble_hrs_on_db_disc_evt(&m_hrs_c, p_evt);
ble_bas_on_db_disc_evt(&m_bas_c, p_evt);
}
/**@brief Function for handling Peer Manager events.
*
* @param[in] p_evt Peer Manager event.
*/
static void 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:
// Bonds are deleted. Start scanning.
scan_start();
break;
default:
break;
}
}
/**
* @brief Function for shutdown events.
*
* @param[in] event Shutdown type.
*/
static bool shutdown_handler(nrf_pwr_mgmt_evt_t event)
{
ret_code_t err_code;
err_code = bsp_indication_set(BSP_INDICATE_IDLE);
APP_ERROR_CHECK(err_code);
switch (event)
{
case NRF_PWR_MGMT_EVT_PREPARE_WAKEUP:
// Prepare wakeup buttons.
err_code = bsp_btn_ble_sleep_mode_prepare();
APP_ERROR_CHECK(err_code);
break;
default:
break;
}
return true;
}
NRF_PWR_MGMT_HANDLER_REGISTER(shutdown_handler, APP_SHUTDOWN_HANDLER_PRIORITY);
/**@brief Function for handling BLE events.
*
* @param[in] p_ble_evt Bluetooth stack event.
* @param[in] p_context Unused.
*/
static void ble_evt_handler(ble_evt_t const * p_ble_evt, void * p_context)
{
ret_code_t err_code;
ble_gap_evt_t const * p_gap_evt = &p_ble_evt->evt.gap_evt;
switch (p_ble_evt->header.evt_id)
{
case BLE_GAP_EVT_CONNECTED:
{
NRF_LOG_INFO("Nordic_HRM Peripheral is Connected.");
// Discover peer's services.
err_code = ble_db_discovery_start(&m_db_disc, p_ble_evt->evt.gap_evt.conn_handle);
APP_ERROR_CHECK(err_code);
err_code = bsp_indication_set(BSP_INDICATE_CONNECTED);
APP_ERROR_CHECK(err_code);
if (ble_conn_state_central_conn_count() < NRF_SDH_BLE_CENTRAL_LINK_COUNT)
{
scan_start();
}
} break;
case BLE_GAP_EVT_DISCONNECTED:
{
NRF_LOG_INFO("Disconnected, reason 0x%x.",
p_gap_evt->params.disconnected.reason);
err_code = bsp_indication_set(BSP_INDICATE_IDLE);
APP_ERROR_CHECK(err_code);
if (ble_conn_state_central_conn_count() < NRF_SDH_BLE_CENTRAL_LINK_COUNT)
{
scan_start();
}
} break;
case BLE_GAP_EVT_TIMEOUT:
{
if (p_gap_evt->params.timeout.src == BLE_GAP_TIMEOUT_SRC_CONN)
{
NRF_LOG_INFO("Connection Request timed out.");
}
} break;
case BLE_GAP_EVT_CONN_PARAM_UPDATE_REQUEST:
// Accepting parameters requested by peer.
err_code = sd_ble_gap_conn_param_update(p_gap_evt->conn_handle,
&p_gap_evt->params.conn_param_update_request.conn_params);
APP_ERROR_CHECK(err_code);
break;
case BLE_GAP_EVT_PHY_UPDATE_REQUEST:
{
NRF_LOG_DEBUG("PHY update request.");
ble_gap_phys_t const phys =
{
.rx_phys = BLE_GAP_PHY_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;
case BLE_GAP_EVT_SEC_PARAMS_REQUEST:
NRF_LOG_DEBUG("BLE_GAP_EVT_SEC_PARAMS_REQUEST");
break;
case BLE_GAP_EVT_AUTH_KEY_REQUEST:
NRF_LOG_INFO("BLE_GAP_EVT_AUTH_KEY_REQUEST");
break;
case BLE_GAP_EVT_LESC_DHKEY_REQUEST:
NRF_LOG_INFO("BLE_GAP_EVT_LESC_DHKEY_REQUEST");
break;
case BLE_GAP_EVT_AUTH_STATUS:
NRF_LOG_INFO("BLE_GAP_EVT_AUTH_STATUS: status=0x%x bond=0x%x lv4: %d kdist_own:0x%x kdist_peer:0x%x",
p_ble_evt->evt.gap_evt.params.auth_status.auth_status,
p_ble_evt->evt.gap_evt.params.auth_status.bonded,
p_ble_evt->evt.gap_evt.params.auth_status.sm1_levels.lv4,
*((uint8_t *)&p_ble_evt->evt.gap_evt.params.auth_status.kdist_own),
*((uint8_t *)&p_ble_evt->evt.gap_evt.params.auth_status.kdist_peer));
break;
default:
break;
}
}
/**@brief SoftDevice SoC event handler.
*
* @param[in] evt_id SoC event.
* @param[in] p_context Context.
*/
static void soc_evt_handler(uint32_t evt_id, void * p_context)
{
switch (evt_id)
{
case NRF_EVT_FLASH_OPERATION_SUCCESS:
/* fall through */
case NRF_EVT_FLASH_OPERATION_ERROR:
if (m_memory_access_in_progress)
{
m_memory_access_in_progress = false;
scan_start();
}
break;
default:
// No implementation needed.
break;
}
}
/**@brief Function for initializing the BLE stack.
*
* @details Initializes the SoftDevice and the BLE event interrupt.
*/
static void ble_stack_init(void)
{
ret_code_t err_code;
err_code = nrf_sdh_enable_request();
APP_ERROR_CHECK(err_code);
// Configure the BLE stack using the default settings.
// Fetch the start address of the application RAM.
uint32_t ram_start = 0;
err_code = nrf_sdh_ble_default_cfg_set(APP_BLE_CONN_CFG_TAG, &ram_start);
APP_ERROR_CHECK(err_code);
// Enable BLE stack.
err_code = nrf_sdh_ble_enable(&ram_start);
APP_ERROR_CHECK(err_code);
// Register handlers for BLE and SoC events.
NRF_SDH_BLE_OBSERVER(m_ble_observer, APP_BLE_OBSERVER_PRIO, ble_evt_handler, NULL);
NRF_SDH_SOC_OBSERVER(m_soc_observer, APP_SOC_OBSERVER_PRIO, soc_evt_handler, NULL);
}
/**@brief Function for the Peer Manager initialization.
*/
static void peer_manager_init(void)
{
ble_gap_sec_params_t sec_param;
ret_code_t err_code;
err_code = pm_init();
APP_ERROR_CHECK(err_code);
memset(&sec_param, 0, sizeof(ble_gap_sec_params_t));
// Security parameters to be used for all security procedures.
sec_param.bond = SEC_PARAM_BOND;
sec_param.mitm = SEC_PARAM_MITM;
sec_param.lesc = SEC_PARAM_LESC;
sec_param.keypress = SEC_PARAM_KEYPRESS;
sec_param.io_caps = SEC_PARAM_IO_CAPABILITIES;
sec_param.oob = SEC_PARAM_OOB;
sec_param.min_key_size = SEC_PARAM_MIN_KEY_SIZE;
sec_param.max_key_size = SEC_PARAM_MAX_KEY_SIZE;
sec_param.kdist_own.enc = 1;
sec_param.kdist_own.id = 1;
sec_param.kdist_peer.enc = 1;
sec_param.kdist_peer.id = 1;
err_code = pm_sec_params_set(&sec_param);
APP_ERROR_CHECK(err_code);
err_code = pm_register(pm_evt_handler);
APP_ERROR_CHECK(err_code);
}
/** @brief Clear bonding information from persistent storage
*/
static void delete_bonds(void)
{
ret_code_t err_code;
NRF_LOG_INFO("Erase bonds!");
err_code = pm_peers_delete();
APP_ERROR_CHECK(err_code);
}
/**@brief Function for disabling the use of whitelist for scanning.
*/
static void whitelist_disable(void)
{
if (!m_whitelist_disabled)
{
NRF_LOG_INFO("Whitelist temporarily disabled.");
m_whitelist_disabled = true;
nrf_ble_scan_stop();
scan_start();
}
}
/**@brief Function for handling events from the BSP module.
*
* @param[in] event Event generated by button press.
*/
void bsp_event_handler(bsp_event_t event)
{
ret_code_t err_code;
switch (event)
{
case BSP_EVENT_SLEEP:
nrf_pwr_mgmt_shutdown(NRF_PWR_MGMT_SHUTDOWN_GOTO_SYSOFF);
break;
case BSP_EVENT_DISCONNECT:
err_code = sd_ble_gap_disconnect(m_conn_handle, BLE_HCI_REMOTE_USER_TERMINATED_CONNECTION);
if (err_code != NRF_ERROR_INVALID_STATE)
{
APP_ERROR_CHECK(err_code);
}
break;
case BSP_EVENT_WHITELIST_OFF:
whitelist_disable();
break;
default:
break;
}
}
/**@brief Heart Rate Collector Handler.
*/
static void hrs_c_evt_handler(ble_hrs_c_t * p_hrs_c, ble_hrs_c_evt_t * p_hrs_c_evt)
{
ret_code_t err_code;
switch (p_hrs_c_evt->evt_type)
{
case BLE_HRS_C_EVT_DISCOVERY_COMPLETE:
{
NRF_LOG_DEBUG("Heart rate service discovered.");
NRF_LOG_INFO("Heart rate service discovered.");
err_code = ble_hrs_c_handles_assign(p_hrs_c,
p_hrs_c_evt->conn_handle,
&p_hrs_c_evt->params.peer_db);
APP_ERROR_CHECK(err_code);
// Initiate bonding.
err_code = pm_conn_secure(p_hrs_c_evt->conn_handle, false);
if (err_code != NRF_ERROR_BUSY)
{
APP_ERROR_CHECK(err_code);
}
// Heart rate service discovered. Enable notification of Heart Rate Measurement.
err_code = ble_hrs_c_hrm_notif_enable(p_hrs_c);
APP_ERROR_CHECK(err_code);
} break;
case BLE_HRS_C_EVT_HRM_NOTIFICATION:
{
NRF_LOG_INFO("Heart Rate = %d.", p_hrs_c_evt->params.hrm.hr_value);
if (p_hrs_c_evt->params.hrm.rr_intervals_cnt != 0)
{
uint32_t rr_avg = 0;
for (uint32_t i = 0; i < p_hrs_c_evt->params.hrm.rr_intervals_cnt; i++)
{
rr_avg += p_hrs_c_evt->params.hrm.rr_intervals[i];
}
rr_avg = rr_avg / p_hrs_c_evt->params.hrm.rr_intervals_cnt;
NRF_LOG_DEBUG("rr_interval (avg) = %d.", rr_avg);
}
} break;
default:
break;
}
}
/**@brief Battery level Collector Handler.
*/
static void bas_c_evt_handler(ble_bas_c_t * p_bas_c, ble_bas_c_evt_t * p_bas_c_evt)
{
ret_code_t err_code;
switch (p_bas_c_evt->evt_type)
{
case BLE_BAS_C_EVT_DISCOVERY_COMPLETE:
{
err_code = ble_bas_c_handles_assign(p_bas_c,
p_bas_c_evt->conn_handle,
&p_bas_c_evt->params.bas_db);
APP_ERROR_CHECK(err_code);
// Battery service discovered. Enable notification of Battery Level.
NRF_LOG_DEBUG("Battery Service discovered. Reading battery level.");
NRF_LOG_INFO("Battery Service discovered. Reading battery level.");
err_code = ble_bas_c_bl_read(p_bas_c);
APP_ERROR_CHECK(err_code);
NRF_LOG_DEBUG("Enabling Battery Level Notification.");
err_code = ble_bas_c_bl_notif_enable(p_bas_c);
APP_ERROR_CHECK(err_code);
} break;
case BLE_BAS_C_EVT_BATT_NOTIFICATION:
NRF_LOG_INFO("Battery Level received %d %%.", p_bas_c_evt->params.battery_level);
break;
case BLE_BAS_C_EVT_BATT_READ_RESP:
NRF_LOG_INFO("Battery Level Read as %d %%.", p_bas_c_evt->params.battery_level);
break;
default:
break;
}
}
/**
* @brief Heart rate collector initialization.
*/
static void hrs_c_init(void)
{
ble_hrs_c_init_t hrs_c_init_obj;
hrs_c_init_obj.evt_handler = hrs_c_evt_handler;
hrs_c_init_obj.error_handler = service_error_handler;
hrs_c_init_obj.p_gatt_queue = &m_ble_gatt_queue;
ret_code_t err_code = ble_hrs_c_init(&m_hrs_c, &hrs_c_init_obj);
APP_ERROR_CHECK(err_code);
}
/**
* @brief Battery level collector initialization.
*/
static void bas_c_init(void)
{
ble_bas_c_init_t bas_c_init_obj;
bas_c_init_obj.evt_handler = bas_c_evt_handler;
bas_c_init_obj.error_handler = service_error_handler;
bas_c_init_obj.p_gatt_queue = &m_ble_gatt_queue;
ret_code_t err_code = ble_bas_c_init(&m_bas_c, &bas_c_init_obj);
APP_ERROR_CHECK(err_code);
}
/**
* @brief Database discovery collector initialization.
*/
static void db_discovery_init(void)
{
ble_db_discovery_init_t db_init;
memset(&db_init, 0, sizeof(db_init));
db_init.evt_handler = db_disc_handler;
db_init.p_gatt_queue = &m_ble_gatt_queue;
ret_code_t err_code = ble_db_discovery_init(&db_init);
APP_ERROR_CHECK(err_code);
}
/**@brief Retrieve a list of peer manager peer IDs.
*
* @param[inout] p_peers The buffer where to store the list of peer IDs.
* @param[inout] p_size In: The size of the @p p_peers buffer.
* Out: The number of peers copied in the buffer.
*/
static void peer_list_get(pm_peer_id_t * p_peers, uint32_t * p_size)
{
pm_peer_id_t peer_id;
uint32_t peers_to_copy;
peers_to_copy = (*p_size < BLE_GAP_WHITELIST_ADDR_MAX_COUNT) ?
*p_size : BLE_GAP_WHITELIST_ADDR_MAX_COUNT;
peer_id = pm_next_peer_id_get(PM_PEER_ID_INVALID);
*p_size = 0;
while ((peer_id != PM_PEER_ID_INVALID) && (peers_to_copy--))
{
p_peers[(*p_size)++] = peer_id;
peer_id = pm_next_peer_id_get(peer_id);
}
}
static void whitelist_load()
{
ret_code_t ret;
pm_peer_id_t peers[8];
uint32_t peer_cnt;
memset(peers, PM_PEER_ID_INVALID, sizeof(peers));
peer_cnt = (sizeof(peers) / sizeof(pm_peer_id_t));
// Load all peers from flash and whitelist them.
peer_list_get(peers, &peer_cnt);
ret = pm_whitelist_set(peers, peer_cnt);
APP_ERROR_CHECK(ret);
// Setup the device identies list.
// Some SoftDevices do not support this feature.
ret = pm_device_identities_list_set(peers, peer_cnt);
if (ret != NRF_ERROR_NOT_SUPPORTED)
{
APP_ERROR_CHECK(ret);
}
}
static void on_whitelist_req(void)
{
ret_code_t err_code;
// Whitelist buffers.
ble_gap_addr_t whitelist_addrs[8];
ble_gap_irk_t whitelist_irks[8];
memset(whitelist_addrs, 0x00, sizeof(whitelist_addrs));
memset(whitelist_irks, 0x00, sizeof(whitelist_irks));
uint32_t addr_cnt = (sizeof(whitelist_addrs) / sizeof(ble_gap_addr_t));
uint32_t irk_cnt = (sizeof(whitelist_irks) / sizeof(ble_gap_irk_t));
// Reload the whitelist and whitelist all peers.
whitelist_load();
// Get the whitelist previously set using pm_whitelist_set().
err_code = pm_whitelist_get(whitelist_addrs, &addr_cnt,
whitelist_irks, &irk_cnt);
if (((addr_cnt == 0) && (irk_cnt == 0)) ||
(m_whitelist_disabled))
{
// Don't use whitelist.
err_code = nrf_ble_scan_params_set(&m_scan, NULL);
APP_ERROR_CHECK(err_code);
}
}
/**@brief Function to start scanning.
*/
static void scan_start(void)
{
ret_code_t err_code;
if (nrf_fstorage_is_busy(NULL))
{
m_memory_access_in_progress = true;
return;
}
NRF_LOG_INFO("Start Scannig for Nordic_HRM Peripheral");
err_code = nrf_ble_scan_start(&m_scan);
APP_ERROR_CHECK(err_code);
err_code = bsp_indication_set(BSP_INDICATE_SCANNING);
APP_ERROR_CHECK(err_code);
}
/**@brief Function for initializing buttons and leds.
*
* @param[out] p_erase_bonds Will be true if the clear bonding button was pressed to wake the application up.
*/
static void buttons_leds_init(bool * p_erase_bonds)
{
ret_code_t err_code;
bsp_event_t startup_event;
err_code = bsp_init(BSP_INIT_LEDS | BSP_INIT_BUTTONS, bsp_event_handler);
APP_ERROR_CHECK(err_code);
err_code = bsp_btn_ble_init(NULL, &startup_event);
APP_ERROR_CHECK(err_code);
*p_erase_bonds = (startup_event == BSP_EVENT_CLEAR_BONDING_DATA);
}
/**@brief Function for initializing the nrf log module.
*/
static void log_init(void)
{
ret_code_t err_code = NRF_LOG_INIT(NULL);
APP_ERROR_CHECK(err_code);
NRF_LOG_DEFAULT_BACKENDS_INIT();
}
/**@brief Function for initializing the power management module. */
static void power_management_init(void)
{
ret_code_t err_code;
err_code = nrf_pwr_mgmt_init();
APP_ERROR_CHECK(err_code);
}
/**@brief GATT module event handler.
*/
static void gatt_evt_handler(nrf_ble_gatt_t * p_gatt, nrf_ble_gatt_evt_t const * p_evt)
{
switch (p_evt->evt_id)
{
case NRF_BLE_GATT_EVT_ATT_MTU_UPDATED:
{
NRF_LOG_INFO("GATT ATT MTU on connection 0x%x changed to %d.",
p_evt->conn_handle,
p_evt->params.att_mtu_effective);
} break;
case NRF_BLE_GATT_EVT_DATA_LENGTH_UPDATED:
{
NRF_LOG_INFO("Data length for connection 0x%x updated to %d.",
p_evt->conn_handle,
p_evt->params.data_length);
} break;
default:
break;
}
}
static void scan_evt_handler(scan_evt_t const * p_scan_evt)
{
ret_code_t err_code;
switch(p_scan_evt->scan_evt_id)
{
case NRF_BLE_SCAN_EVT_WHITELIST_REQUEST:
{
on_whitelist_req();
m_whitelist_disabled = false;
} break;
case NRF_BLE_SCAN_EVT_CONNECTING_ERROR:
{
err_code = p_scan_evt->params.connecting_err.err_code;
APP_ERROR_CHECK(err_code);
} break;
case NRF_BLE_SCAN_EVT_SCAN_TIMEOUT:
{
NRF_LOG_INFO("Scan timed out.");
scan_start();
} break;
case NRF_BLE_SCAN_EVT_FILTER_MATCH:
break;
case NRF_BLE_SCAN_EVT_WHITELIST_ADV_REPORT:
break;
default:
break;
}
}
/**@brief Function for initializing the timer.
*/
static void timer_init(void)
{
ret_code_t err_code = app_timer_init();
APP_ERROR_CHECK(err_code);
}
/**@brief Function for initializing the GATT module.
*/
static void gatt_init(void)
{
ret_code_t err_code = nrf_ble_gatt_init(&m_gatt, gatt_evt_handler);
APP_ERROR_CHECK(err_code);
}
/**@brief Function for initialization scanning and setting filters.
*/
static void scan_init(void)
{
ret_code_t err_code;
nrf_ble_scan_init_t init_scan;
memset(&init_scan, 0, sizeof(init_scan));
init_scan.p_scan_param = &m_scan_param;
init_scan.connect_if_match = true;
init_scan.conn_cfg_tag = APP_BLE_CONN_CFG_TAG;
err_code = nrf_ble_scan_init(&m_scan, &init_scan, scan_evt_handler);
APP_ERROR_CHECK(err_code);
ble_uuid_t uuid =
{
.uuid = TARGET_UUID,
.type = BLE_UUID_TYPE_BLE,
};
err_code = nrf_ble_scan_filter_set(&m_scan,
SCAN_UUID_FILTER,
&uuid);
APP_ERROR_CHECK(err_code);
if (strlen(m_target_periph_name) != 0)
{
err_code = nrf_ble_scan_filter_set(&m_scan,
SCAN_NAME_FILTER,
m_target_periph_name);
APP_ERROR_CHECK(err_code);
}
if (is_connect_per_addr)
{
err_code = nrf_ble_scan_filter_set(&m_scan,
SCAN_ADDR_FILTER,
m_target_periph_addr.addr);
APP_ERROR_CHECK(err_code);
}
err_code = nrf_ble_scan_filters_enable(&m_scan,
NRF_BLE_SCAN_ALL_FILTER,
false);
APP_ERROR_CHECK(err_code);
}
/**@brief Function for handling the idle state (main loop).
*
* @details Handle any pending log operation(s), then sleep until the next event occurs.
*/
static void idle_state_handle(void)
{
ret_code_t err_code;
err_code = nrf_ble_lesc_request_handler();
APP_ERROR_CHECK(err_code);
NRF_LOG_FLUSH();
nrf_pwr_mgmt_run();
}
/**@brief Function for starting a scan, or instead trigger it from peer manager (after
* deleting bonds).
*
* @param[in] p_erase_bonds Pointer to a bool to determine if bonds will be deleted before scanning.
*/
void scanning_start(bool * p_erase_bonds)
{
// Start scanning for peripherals and initiate connection
// with devices that advertise GATT Service UUID.
if (*p_erase_bonds == true)
{
// Scan is started by the PM_EVT_PEERS_DELETE_SUCCEEDED event.
delete_bonds();
}
else
{
scan_start();
}
}
int main(void)
{
bool erase_bonds;
// Initialize.
log_init();
timer_init();
power_management_init();
buttons_leds_init(&erase_bonds);
ble_stack_init();
gatt_init();
peer_manager_init();
db_discovery_init();
hrs_c_init();
bas_c_init();
scan_init();
// Start execution.
NRF_LOG_INFO("Programming Execution Started");
scanning_start(&erase_bonds);
// Enter main loop.
for (;;)
{
idle_state_handle();
}
}
As per your guidance I was trying to use Battery Service from Above said GATT Service. but could not able to read.
I have used one nRF52840-DK board with ble Peripheral --> ble_app_hrs example
and second nRF52840-DK board with ble Central--> ble_app_hrs_c example.
I am trying to read battery level of Peripheral device in to the central ble_app_hrs_c example.
but with using nRF log info I can see that my BLE_DB_DISCOVERY_ERROR instead of Discovery complete. See Image.
What you suggest here to make it happen ?
I have attached both main.c and ble_bas_c.c