I get disconnected when receiving notification from characterisitc.
Everything looks fine in nRF Connect app - screenshot below:
Strange behavior begins when I am trying to run my central code. On notification event board is being disconnected log below:
/**
* Copyright (c) 2012 - 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.
*
*/
#include "sdk_common.h"
#include <stdlib.h>
#include "ble.h"
#include "ble_ess_c.h"
#include "ble_gattc.h"
#include "ble_srv_common.h"
#include "app_error.h"
#define NRF_LOG_MODULE_NAME ble_ess
#include "nrf_log.h"
NRF_LOG_MODULE_REGISTER();
void ble_ess_c_on_db_disc_evt(ble_ess_c_t * p_ble_ess_c, ble_db_discovery_evt_t * p_evt)
{
ble_ess_c_evt_t ess_c_evt;
memset(&ess_c_evt,0,sizeof(ble_ess_c_evt_t));
ble_gatt_db_char_t * p_chars = p_evt->params.discovered_db.charateristics;
if ( (p_evt->evt_type == BLE_DB_DISCOVERY_COMPLETE)
&& (p_evt->params.discovered_db.srv_uuid.uuid == BLE_UUID_ENV_SENSING_SERVICE)
&& (p_evt->params.discovered_db.srv_uuid.type == BLE_UUID_TYPE_BLE))
{
for (uint32_t i = 0; i < p_evt->params.discovered_db.char_count; i++)
{
switch (p_chars[i].characteristic.uuid.uuid)
{
case BLE_UUID_HUMIDITY_CHARACTERISTIC:
ess_c_evt.params.handles.ess_humidity_handle = p_chars[i].characteristic.handle_value;
ess_c_evt.params.handles.ess_humidity_cccd_handle = p_chars[i].cccd_handle;
break;
default:
break;
}
}
if (p_ble_ess_c->evt_handler != NULL)
{
ess_c_evt.conn_handle = p_evt->conn_handle;
ess_c_evt.evt_type = BLE_ESS_C_EVT_DISCOVERY_COMPLETE;
p_ble_ess_c->evt_handler(p_ble_ess_c, &ess_c_evt);
}
}
}
static void on_hvx(ble_ess_c_t * p_ble_ess_c, ble_evt_t const * p_ble_evt)
{
if ( (p_ble_ess_c->handles.ess_humidity_handle != BLE_GATT_HANDLE_INVALID)
&& (p_ble_evt->evt.gattc_evt.params.hvx.handle == p_ble_ess_c->handles.ess_humidity_handle)
&& (p_ble_ess_c->evt_handler != NULL))
{
ble_ess_c_evt_t ble_ess_c_evt;
ble_ess_c_evt.evt_type = BLE_ESS_C_EVT_HUMIDITY_EVT;
ble_ess_c_evt.params.humidity.humidity_value = p_ble_evt->evt.gattc_evt.params.hvx.data;
p_ble_ess_c->evt_handler(p_ble_ess_c, &ble_ess_c_evt);
}
}
uint32_t ble_ess_c_init(ble_ess_c_t * p_ble_ess_c, ble_ess_c_init_t * p_ble_ess_c_init)
{
uint32_t err_code;
ble_uuid_t ess_uuid;
VERIFY_PARAM_NOT_NULL(p_ble_ess_c);
VERIFY_PARAM_NOT_NULL(p_ble_ess_c_init);
ess_uuid.type = BLE_UUID_TYPE_BLE;
ess_uuid.uuid = BLE_UUID_ENV_SENSING_SERVICE;
p_ble_ess_c->evt_handler = p_ble_ess_c_init->evt_handler;
p_ble_ess_c->conn_handle = BLE_CONN_HANDLE_INVALID;
p_ble_ess_c->handles.ess_humidity_handle = BLE_GATT_HANDLE_INVALID;
p_ble_ess_c->handles.ess_humidity_cccd_handle = BLE_GATT_HANDLE_INVALID;
return ble_db_discovery_evt_register(&ess_uuid);
}
void ble_ess_c_on_ble_evt(ble_evt_t const * p_ble_evt, void * p_context)
{
ble_ess_c_t * p_ble_ess_c = (ble_ess_c_t *)p_context;
if ((p_ble_ess_c == NULL) || (p_ble_evt == NULL))
{
return;
}
if ( (p_ble_ess_c->conn_handle != BLE_CONN_HANDLE_INVALID)
&&(p_ble_ess_c->conn_handle != p_ble_evt->evt.gap_evt.conn_handle)
)
{
return;
}
switch (p_ble_evt->header.evt_id)
{
case BLE_GATTC_EVT_HVX:
on_hvx(p_ble_ess_c, p_ble_evt);
break;
case BLE_GAP_EVT_DISCONNECTED:
if (p_ble_evt->evt.gap_evt.conn_handle == p_ble_ess_c->conn_handle
&& p_ble_ess_c->evt_handler != NULL)
{
ble_ess_c_evt_t ess_c_evt;
ess_c_evt.evt_type = BLE_ESS_C_EVT_DISCONNECTED;
p_ble_ess_c->conn_handle = BLE_CONN_HANDLE_INVALID;
p_ble_ess_c->evt_handler(p_ble_ess_c, &ess_c_evt);
}
break;
default:
break;
}
}
static uint32_t cccd_configure(uint16_t conn_handle, uint16_t cccd_handle, bool enable)
{
uint8_t buf[BLE_CCCD_VALUE_LEN];
buf[0] = enable ? BLE_GATT_HVX_NOTIFICATION : 0;
buf[1] = 0;
ble_gattc_write_params_t const write_params =
{
.write_op = BLE_GATT_OP_WRITE_REQ,
.flags = BLE_GATT_EXEC_WRITE_FLAG_PREPARED_WRITE,
.handle = cccd_handle,
.offset = 0,
.len = sizeof(buf),
.p_value = buf
};
return sd_ble_gattc_write(conn_handle, &write_params);
}
uint32_t ble_ess_c_tx_notif_enable(ble_ess_c_t * p_ble_ess_c)
{
VERIFY_PARAM_NOT_NULL(p_ble_ess_c);
if ( (p_ble_ess_c->conn_handle == BLE_CONN_HANDLE_INVALID)
||(p_ble_ess_c->handles.ess_humidity_cccd_handle == BLE_GATT_HANDLE_INVALID)
)
{
return NRF_ERROR_INVALID_STATE;
}
return cccd_configure(p_ble_ess_c->conn_handle,p_ble_ess_c->handles.ess_humidity_cccd_handle, true);
}
uint32_t ble_ess_c_handles_assign(ble_ess_c_t * p_ble_ess,
uint16_t conn_handle,
ble_ess_c_handles_t const * p_peer_handles)
{
VERIFY_PARAM_NOT_NULL(p_ble_ess);
p_ble_ess->conn_handle = conn_handle;
if (p_peer_handles != NULL)
{
p_ble_ess->handles.ess_humidity_cccd_handle = p_peer_handles->ess_humidity_cccd_handle;
p_ble_ess->handles.ess_humidity_handle = p_peer_handles->ess_humidity_handle;
}
return NRF_SUCCESS;
}
Main is a modified ble_nus_c example:
/**
* Copyright (c) 2016 - 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.
*
*/
#include <stdio.h>
#include <stdint.h>
#include <stdbool.h>
#include "nordic_common.h"
#include "app_error.h"
#include "app_uart.h"
#include "ble_db_discovery.h"
#include "app_timer.h"
#include "app_util.h"
#include "bsp_btn_ble.h"
#include "ble.h"
#include "ble_gap.h"
#include "ble_hci.h"
#include "nrf_sdh.h"
#include "nrf_sdh_ble.h"
#include "nrf_sdh_soc.h"
#include "ble_advdata.h"
#include "ble_nus_c.h"
#include "nrf_ble_gatt.h"
#include "nrf_pwr_mgmt.h"
#include "nrf_log.h"
#include "nrf_log_ctrl.h"
#include "nrf_log_default_backends.h"
#define APP_BLE_CONN_CFG_TAG 1 /**< A tag that refers to the BLE stack configuration we set with @ref sd_ble_cfg_set. Default tag is @ref BLE_CONN_CFG_TAG_DEFAULT. */
#define APP_BLE_OBSERVER_PRIO 3 /**< Application's BLE observer priority. You shoulnd't need to modify this value. */
#define UART_TX_BUF_SIZE 256 /**< UART TX buffer size. */
#define UART_RX_BUF_SIZE 256 /**< UART RX buffer size. */
#define SCAN_INTERVAL 0x00A0 /**< Determines scan interval in units of 0.625 millisecond. */
#define SCAN_WINDOW 0x0050 /**< Determines scan window in units of 0.625 millisecond. */
#define SCAN_DURATION 0x0000 /**< Timout when scanning. 0x0000 disables timeout. */
#define MIN_CONNECTION_INTERVAL MSEC_TO_UNITS(20, UNIT_1_25_MS) /**< Determines minimum connection interval in millisecond. */
#define MAX_CONNECTION_INTERVAL MSEC_TO_UNITS(75, UNIT_1_25_MS) /**< Determines maximum connection interval in millisecond. */
#define SLAVE_LATENCY 0 /**< Determines slave latency in counts of connection events. */
#define SUPERVISION_TIMEOUT MSEC_TO_UNITS(4000, UNIT_10_MS) /**< Determines supervision time-out in units of 10 millisecond. */
#define ECHOBACK_BLE_UART_DATA 1 /**< Echo the UART data that is received over the Nordic UART Service back to the sender. */
BLE_ESS_C_DEF(m_ble_ess_c); /**< BLE NUS service client instance. */
NRF_BLE_GATT_DEF(m_gatt); /**< GATT module instance. */
BLE_DB_DISCOVERY_DEF(m_db_disc); /**< DB discovery module instance. */
/**@brief Connection parameters requested for connection. */
static ble_gap_conn_params_t const m_connection_param =
{
(uint16_t)MIN_CONNECTION_INTERVAL, // Minimum connection
(uint16_t)MAX_CONNECTION_INTERVAL, // Maximum connection
(uint16_t)SLAVE_LATENCY, // Slave latency
(uint16_t)SUPERVISION_TIMEOUT // Supervision time-out
};
static uint8_t m_scan_buffer_data[BLE_GAP_SCAN_BUFFER_MIN]; /**< buffer where advertising reports will be stored by the SoftDevice. */
/**@brief Pointer to the buffer where advertising reports will be stored by the SoftDevice. */
static ble_data_t m_scan_buffer =
{
m_scan_buffer_data,
BLE_GAP_SCAN_BUFFER_MIN
};
/** @brief Parameters used when scanning. */
static ble_gap_scan_params_t const m_scan_params =
{
.active = 1,
.interval = SCAN_INTERVAL,
.window = SCAN_WINDOW,
.timeout = SCAN_DURATION,
.scan_phys = BLE_GAP_PHY_1MBPS,
.filter_policy = BLE_GAP_SCAN_FP_ACCEPT_ALL,
};
/**@brief NUS uuid. */
static ble_uuid_t const m_ess_uuid =
{
.uuid = BLE_UUID_ENV_SENSING_SERVICE,
.type = BLE_UUID_TYPE_BLE
};
/**@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 to start scanning. */
static void scan_start(void)
{
ret_code_t ret;
(void) sd_ble_gap_scan_stop();
ret = sd_ble_gap_scan_start(&m_scan_params, &m_scan_buffer);
APP_ERROR_CHECK(ret);
ret = bsp_indication_set(BSP_INDICATE_SCANNING);
APP_ERROR_CHECK(ret);
}
/**@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_ess_c_on_db_disc_evt(&m_ble_ess_c, p_evt);
}
/**@brief Function for handling characters received by the Nordic UART Service.
*
* @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 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 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.
*/
void uart_event_handle(app_uart_evt_t * p_event)
{
static uint8_t data_array[255];
static uint16_t index = 0;
uint32_t ret_val;
switch (p_event->evt_type)
{
/**@snippet [Handling data from UART] */
case APP_UART_DATA_READY:
UNUSED_VARIABLE(app_uart_get(&data_array[index]));
index++;
if ((data_array[index - 1] == '\n') || (index >= (255)))
{
NRF_LOG_DEBUG("Ready to send data over BLE NUS");
NRF_LOG_HEXDUMP_DEBUG(data_array, index);
/* do
{
ret_val = ble_nus_c_string_send(&m_ble_nus_c, data_array, index);
if ( (ret_val != NRF_ERROR_INVALID_STATE) && (ret_val != NRF_ERROR_BUSY) )
{
APP_ERROR_CHECK(ret_val);
}
} while (ret_val == NRF_ERROR_BUSY); */
index = 0;
}
break;
/**@snippet [Handling data from UART] */
case APP_UART_COMMUNICATION_ERROR:
NRF_LOG_ERROR("Communication error occurred while handling UART.");
APP_ERROR_HANDLER(p_event->data.error_communication);
break;
case APP_UART_FIFO_ERROR:
NRF_LOG_ERROR("Error occurred in FIFO module used by UART.");
APP_ERROR_HANDLER(p_event->data.error_code);
break;
default:
break;
}
}
/**@brief Callback handling NUS Client events.
*
* @details This function is called to notify the application of NUS client events.
*
* @param[in] p_ble_nus_c NUS Client Handle. This identifies the NUS client
* @param[in] p_ble_nus_evt Pointer to the NUS Client event.
*/
/**@snippet [Handling events from the ble_nus_c module] */
static void ble_ess_c_evt_handler(ble_ess_c_t * p_ble_ess_c, ble_ess_c_evt_t const * p_ble_ess_evt)
{
ret_code_t err_code;
switch (p_ble_ess_evt->evt_type)
{
case BLE_ESS_C_EVT_DISCOVERY_COMPLETE:
NRF_LOG_INFO("Discovery complete.");
err_code = ble_ess_c_handles_assign(p_ble_ess_c, p_ble_ess_evt->conn_handle, &p_ble_ess_evt->params.handles);
APP_ERROR_CHECK(err_code);
err_code = ble_ess_c_tx_notif_enable(p_ble_ess_c);
APP_ERROR_CHECK(err_code);
NRF_LOG_INFO("Connected to device with ESS.");
break;
case BLE_ESS_C_EVT_HUMIDITY_EVT:
NRF_LOG_INFO("HUMIDITY UPDATED!");
NRF_LOG_INFO("0x%h", p_ble_ess_evt->params.humidity.humidity_value);
case BLE_ESS_C_EVT_DISCONNECTED:
NRF_LOG_INFO("Disconnected.");
scan_start();
break;
}
}
/**@snippet [Handling events from the ble_nus_c module] */
/**
* @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 the advertising report BLE event.
*
* @param[in] p_adv_report Advertising report from the SoftDevice.
*/
static void on_adv_report(ble_gap_evt_adv_report_t const * p_adv_report)
{
ret_code_t err_code;
if (ble_advdata_uuid_find(p_adv_report->data.p_data, p_adv_report->data.len, &m_ess_uuid))
{
err_code = sd_ble_gap_connect(&p_adv_report->peer_addr,
&m_scan_params,
&m_connection_param,
APP_BLE_CONN_CFG_TAG);
if (err_code == NRF_SUCCESS)
{
// scan is automatically stopped by the connect
err_code = bsp_indication_set(BSP_INDICATE_IDLE);
APP_ERROR_CHECK(err_code);
NRF_LOG_INFO("Connecting to target %02x%02x%02x%02x%02x%02x",
p_adv_report->peer_addr.addr[0],
p_adv_report->peer_addr.addr[1],
p_adv_report->peer_addr.addr[2],
p_adv_report->peer_addr.addr[3],
p_adv_report->peer_addr.addr[4],
p_adv_report->peer_addr.addr[5]
);
}
}
else
{
err_code = sd_ble_gap_scan_start(NULL, &m_scan_buffer);
APP_ERROR_CHECK(err_code);
}
}
/**@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_ADV_REPORT:
on_adv_report(&p_gap_evt->params.adv_report);
break; // BLE_GAP_EVT_ADV_REPORT
case BLE_GAP_EVT_CONNECTED:
NRF_LOG_INFO("Connected to target");
err_code = ble_ess_c_handles_assign(&m_ble_ess_c, p_ble_evt->evt.gap_evt.conn_handle, NULL);
APP_ERROR_CHECK(err_code);
err_code = bsp_indication_set(BSP_INDICATE_CONNECTED);
APP_ERROR_CHECK(err_code);
// start discovery of services. The NUS Client waits for a discovery result
err_code = ble_db_discovery_start(&m_db_disc, p_ble_evt->evt.gap_evt.conn_handle);
APP_ERROR_CHECK(err_code);
break;
case BLE_GAP_EVT_TIMEOUT:
if (p_gap_evt->params.timeout.src == BLE_GAP_TIMEOUT_SRC_SCAN)
{
NRF_LOG_INFO("Scan timed out.");
scan_start();
}
else if (p_gap_evt->params.timeout.src == BLE_GAP_TIMEOUT_SRC_CONN)
{
NRF_LOG_INFO("Connection Request timed out.");
}
break;
case BLE_GAP_EVT_SEC_PARAMS_REQUEST:
// Pairing not supported
err_code = sd_ble_gap_sec_params_reply(p_ble_evt->evt.gap_evt.conn_handle, BLE_GAP_SEC_STATUS_PAIRING_NOT_SUPP, NULL, NULL);
APP_ERROR_CHECK(err_code);
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;
default:
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 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 (p_evt->evt_id == NRF_BLE_GATT_EVT_ATT_MTU_UPDATED)
{
NRF_LOG_INFO("ATT MTU exchange completed.");
}
}
/**@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_central_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)
{
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_ble_ess_c.conn_handle,
BLE_HCI_REMOTE_USER_TERMINATED_CONNECTION);
if (err_code != NRF_ERROR_INVALID_STATE)
{
APP_ERROR_CHECK(err_code);
}
break;
default:
break;
}
}
/**@brief Function for initializing the UART. */
static void uart_init(void)
{
ret_code_t err_code;
app_uart_comm_params_t const comm_params =
{
.rx_pin_no = RX_PIN_NUMBER,
.tx_pin_no = TX_PIN_NUMBER,
.rts_pin_no = RTS_PIN_NUMBER,
.cts_pin_no = CTS_PIN_NUMBER,
.flow_control = APP_UART_FLOW_CONTROL_DISABLED,
.use_parity = false,
.baud_rate = UART_BAUDRATE_BAUDRATE_Baud115200
};
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);
}
/**@brief Function for initializing the NUS Client. */
static void ess_c_init(void)
{
ret_code_t err_code;
ble_ess_c_init_t init;
init.evt_handler = ble_ess_c_evt_handler;
err_code = ble_ess_c_init(&m_ble_ess_c, &init);
APP_ERROR_CHECK(err_code);
}
/**@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 timer. */
static void timer_init(void)
{
ret_code_t err_code = app_timer_init();
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);
}
/** @brief Function for initializing the Database Discovery Module. */
static void db_discovery_init(void)
{
ret_code_t err_code = ble_db_discovery_init(db_disc_handler);
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)
{
if (NRF_LOG_PROCESS() == false)
{
nrf_pwr_mgmt_run();
}
}
int main(void)
{
// Initialize.
log_init();
timer_init();
uart_init();
buttons_leds_init();
db_discovery_init();
power_management_init();
ble_stack_init();
gatt_init();
ess_c_init();
// Start execution.
printf("BLE UART central example started.\r\n");
NRF_LOG_INFO("BLE UART central example started.");
scan_start();
// Enter main loop.
for (;;)
{
idle_state_handle();
}
}
Am I missing something?
