Hello,
I have been struggling with multilink uart example for a while. I have done 3 peripherals and one central communication but still I have some problems. I am using SDK 14.2.0 and 4 EYSHSNZWZ modules from Taiyo Yuden.
Central side sends data to peripherals that I send from computer via RS232 correctly, however when I send data from peripherals continuously, one of the peripherals sends the data two times. I think it is because of the central code, not the peripherals because I use same code for peripherals. I think that central shows the data two times. For example for handle 2, peripheral sends 5 bytes but central shows 10 bytes. For the other connection handles, central shows what is send from peripherals.
The main code for central is here:
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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 LED Button Service central and client application main file. * * This example can be a central for up to 8 peripherals. * The peripheral is called ble_app_blinky and can be found in the ble_peripheral * folder. */ #include <stdint.h> #include <stdio.h> #include <string.h> #include "nordic_common.h" #include "app_error.h" #include "app_uart.h" #include "nrf_sdh.h" #include "nrf_sdh_ble.h" #include "app_timer.h" #include "app_util.h" #include "bsp_btn_ble.h" #include "ble.h" #include "ble_hci.h" #include "ble_advdata.h" #include "ble_advertising.h" #include "ble_conn_params.h" #include "ble_db_discovery.h" #include "ble_conn_state.h" #include "ble_nus_c.h" #include "nrf_ble_gatt.h" #include "nrf_delay.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 APP_BLE_CONN_CFG_TAG. */ #define APP_BLE_OBSERVER_PRIO 3 /**< Application's BLE observer priority. You shouldn'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 CENTRAL_SCANNING_LED BSP_BOARD_LED_0 #define CENTRAL_CONNECTED_LED BSP_BOARD_LED_1 #define LEDBUTTON_LED BSP_BOARD_LED_2 /**< LED to indicate a change of state of the the Button characteristic on the peer. */ #define LEDBUTTON_BUTTON BSP_BUTTON_0 /**< Button that will write to the LED characteristic of the peer. */ #define BUTTON_DETECTION_DELAY APP_TIMER_TICKS(50) /**< Delay from a GPIOTE event until a button is reported as pushed (in number of timer ticks). */ #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_TIMEOUT 0x0000 /**< Timout when scanning. 0x0000 disables timeout. */ #define MIN_CONNECTION_INTERVAL MSEC_TO_UNITS(7.5, UNIT_1_25_MS) /**< Determines minimum connection interval in milliseconds. */ #define MAX_CONNECTION_INTERVAL MSEC_TO_UNITS(30, UNIT_1_25_MS) /**< Determines maximum connection interval in milliseconds. */ #define SLAVE_LATENCY 0 /**< Determines slave latency in terms of connection events. */ #define SUPERVISION_TIMEOUT MSEC_TO_UNITS(4000, UNIT_10_MS) /**< Determines supervision time-out in units of 10 milliseconds. */ #define UUID16_SIZE 2 /**< Size of 16 bit UUID */ #define UUID32_SIZE 4 /**< Size of 32 bit UUID */ #define UUID128_SIZE 16 /**< Size of 128 bit UUID */ #define ECHOBACK_BLE_UART_DATA 1 /**< Echo the UART data that is received over the Nordic UART Service back to the sender. */ NRF_BLE_GATT_DEF(m_gatt); /**< GATT module instance. */ BLE_NUS_C_ARRAY_DEF(m_ble_nus_c, NRF_SDH_BLE_CENTRAL_LINK_COUNT); /**< BLE NUS service client instance. */ BLE_DB_DISCOVERY_DEF(m_db_disc); /**< Database discovery module instances. */ static char const m_target_periph_name[] = "Nordic_Blinky"; /**< Name of the device we try to connect to. This name is searched for in the scan report data*/ static uint16_t m_ble_nus_max_data_len = BLE_GATT_ATT_MTU_DEFAULT - OPCODE_LENGTH - HANDLE_LENGTH; /**< Maximum length of data (in bytes) that can be transmitted to the peer by the Nordic UART service module. */ /**@brief Scan parameters requested for scanning and connection. */ static ble_gap_scan_params_t const m_scan_params = { .active = 0, .interval = SCAN_INTERVAL, .window = SCAN_WINDOW, .timeout = SCAN_TIMEOUT, #if (NRF_SD_BLE_API_VERSION <= 2) .selective = 0, .p_whitelist = NULL, #endif #if (NRF_SD_BLE_API_VERSION >= 3) .use_whitelist = 0, .adv_dir_report = 0, #endif }; /**@brief Connection parameters requested for connection. */ static ble_gap_conn_params_t const m_connection_param = { (uint16_t)MIN_CONNECTION_INTERVAL, (uint16_t)MAX_CONNECTION_INTERVAL, (uint16_t)SLAVE_LATENCY, (uint16_t)SUPERVISION_TIMEOUT }; /**@brief Function to handle 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 the LEDs initialization. * * @details Initializes all LEDs used by the application. */ static void leds_init(void) { bsp_board_leds_init(); } /** * @brief Parses advertisement data, providing length and location of the field in case * matching data is found. * * @param[in] type Type of data to be looked for in advertisement data. * @param[in] p_advdata Advertisement report length and pointer to report. * @param[out] p_typedata If data type requested is found in the data report, type data length and * pointer to data will be populated here. * * @retval NRF_SUCCESS if the data type is found in the report. * @retval NRF_ERROR_NOT_FOUND if the data type could not be found. */ static uint32_t adv_report_parse(uint8_t type, uint8_array_t * p_advdata, uint8_array_t * p_typedata) { uint32_t index = 0; uint8_t * p_data; p_data = p_advdata->p_data; while (index < p_advdata->size) { uint8_t field_length = p_data[index]; uint8_t field_type = p_data[index + 1]; if (field_type == type) { p_typedata->p_data = &p_data[index + 2]; p_typedata->size = field_length - 1; return NRF_SUCCESS; } index += field_length + 1; } return NRF_ERROR_NOT_FOUND; } /**@brief Function to start scanning. */ static void scan_start(void) { ret_code_t ret; (void) sd_ble_gap_scan_stop(); NRF_LOG_INFO("Start scanning for device name %s.", (uint32_t)m_target_periph_name); ret = sd_ble_gap_scan_start(&m_scan_params); APP_ERROR_CHECK(ret); ret = bsp_indication_set(BSP_INDICATE_SCANNING); APP_ERROR_CHECK(ret); } /**@brief Function for handling the advertising report BLE event. * * @param[in] p_ble_evt Bluetooth stack event. */ static void on_adv_report(ble_evt_t const * p_ble_evt) { uint32_t err_code; uint8_array_t adv_data; uint8_array_t dev_name; bool do_connect = false; // For readibility. ble_gap_evt_t const * p_gap_evt = &p_ble_evt->evt.gap_evt; ble_gap_addr_t const * peer_addr = &p_gap_evt->params.adv_report.peer_addr; // Prepare advertisement report for parsing. adv_data.p_data = (uint8_t *)p_gap_evt->params.adv_report.data; adv_data.size = p_gap_evt->params.adv_report.dlen; // Search for advertising names. bool found_name = false; err_code = adv_report_parse(BLE_GAP_AD_TYPE_COMPLETE_LOCAL_NAME, &adv_data, &dev_name); if (err_code != NRF_SUCCESS) { // Look for the short local name if it was not found as complete. err_code = adv_report_parse(BLE_GAP_AD_TYPE_SHORT_LOCAL_NAME, &adv_data, &dev_name); if (err_code != NRF_SUCCESS) { // If we can't parse the data, then exit. return; } else { found_name = true; } } else { found_name = true; } if (found_name) { if (strlen(m_target_periph_name) != 0) { if (memcmp(m_target_periph_name, dev_name.p_data, dev_name.size) == 0) { do_connect = true; } } } if (do_connect) { // Initiate connection. err_code = sd_ble_gap_connect(peer_addr, &m_scan_params, &m_connection_param, APP_BLE_CONN_CFG_TAG); if (err_code != NRF_SUCCESS) { NRF_LOG_ERROR("Connection Request Failed, reason %d", 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; // For readability. ble_gap_evt_t const * p_gap_evt = &p_ble_evt->evt.gap_evt; switch (p_ble_evt->header.evt_id) { // Upon connection, check which peripheral has connected, initiate DB // discovery, update LEDs status and resume scanning if necessary. case BLE_GAP_EVT_CONNECTED: { NRF_LOG_INFO("Connection 0x%x established, starting DB discovery.", p_gap_evt->conn_handle); APP_ERROR_CHECK_BOOL(p_gap_evt->conn_handle < NRF_SDH_BLE_CENTRAL_LINK_COUNT); //err_code = ble_nus_c_handles_assign(&m_ble_nus_c[p_gap_evt->conn_handle], p_gap_evt->conn_handle, NULL); err_code = ble_nus_c_handles_assign(&m_ble_nus_c[p_gap_evt->conn_handle], p_ble_evt->evt.gap_evt.conn_handle, NULL); NRF_LOG_INFO("m_ble_nus_c[0x%x]: conn_handle = 0x%x, rx = 0x%x, tx = 0x%x, cccd = 0x%x", p_gap_evt->conn_handle, m_ble_nus_c[p_gap_evt->conn_handle].conn_handle, m_ble_nus_c[p_gap_evt->conn_handle].handles.nus_rx_handle, m_ble_nus_c[p_gap_evt->conn_handle].handles.nus_tx_handle, m_ble_nus_c[p_gap_evt->conn_handle].handles.nus_tx_cccd_handle); APP_ERROR_CHECK(err_code); //err_code = ble_db_discovery_start(&m_db_disc, p_ble_evt->evt.gap_evt.conn_handle); //err_code = ble_db_discovery_start(&m_db_disc, p_gap_evt->conn_handle); err_code = ble_db_discovery_start(&m_db_disc, p_ble_evt->evt.gap_evt.conn_handle); if (err_code != NRF_ERROR_BUSY) { APP_ERROR_CHECK(err_code); } // Update LEDs status, and check if we should be looking for more // peripherals to connect to. bsp_board_led_on(CENTRAL_CONNECTED_LED); if (ble_conn_state_n_centrals() == NRF_SDH_BLE_CENTRAL_LINK_COUNT) { bsp_board_led_off(CENTRAL_SCANNING_LED); } else { // Resume scanning. bsp_board_led_on(CENTRAL_SCANNING_LED); scan_start(); } } break; // BLE_GAP_EVT_CONNECTED // Upon disconnection, reset the connection handle of the peer which disconnected, update // the LEDs status and start scanning again. case BLE_GAP_EVT_DISCONNECTED: { NRF_LOG_INFO("Central link 0x%x disconnected (reason: 0x%x)", p_gap_evt->conn_handle, p_gap_evt->params.disconnected.reason); if (ble_conn_state_n_centrals() == 0) { //err_code = app_button_disable(); //APP_ERROR_CHECK(err_code); // Turn off connection indication LED bsp_board_led_off(CENTRAL_CONNECTED_LED); } // Start scanning scan_start(); // Turn on LED for indicating scanning bsp_board_led_on(CENTRAL_SCANNING_LED); } break; case BLE_GAP_EVT_ADV_REPORT: on_adv_report(p_ble_evt); break; case BLE_GAP_EVT_TIMEOUT: { // We have not specified a timeout for scanning, so only connection attemps can timeout. if (p_gap_evt->params.timeout.src == BLE_GAP_TIMEOUT_SRC_CONN) { NRF_LOG_DEBUG("Connection request timed out."); } } break; case BLE_GAP_EVT_CONN_PARAM_UPDATE_REQUEST: { NRF_LOG_DEBUG("BLE_GAP_EVT_CONN_PARAM_UPDATE_REQUEST."); // Accept parameters requested by peer. err_code = sd_ble_gap_conn_param_update(p_gap_evt->conn_handle, &p_gap_evt->params.conn_param_update_request.conn_params); APP_ERROR_CHECK(err_code); } break; #ifndef S140 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; #endif 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 interrupts. */ 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 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) { NRF_LOG_DEBUG("call to ble_lbs_on_db_disc_evt for instance %d and link 0x%x!", p_evt->conn_handle, p_evt->conn_handle); ble_nus_c_on_db_disc_evt(&m_ble_nus_c[p_evt->conn_handle], 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 { for(uint32_t i = 0; i< NRF_SDH_BLE_CENTRAL_LINK_COUNT; i++) { ret_val = ble_nus_c_string_send(&m_ble_nus_c[i], 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) { uint8_t data_array[BLE_NUS_MAX_DATA_LEN]; uint16_t index = 0; uint32_t ret_val = NRF_ERROR_INVALID_STATE; 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 >= (m_ble_nus_max_data_len))) { //NRF_LOG_DEBUG("Ready to send data over BLE NUS"); // NRF_LOG_INFO("Ready to send data over BLE NUS"); NRF_LOG_HEXDUMP_DEBUG(data_array, index); for (uint32_t i = 0; i < NRF_SDH_BLE_CENTRAL_LINK_COUNT; i++) { if (m_ble_nus_c[i].conn_handle != BLE_CONN_HANDLE_INVALID && 0 != m_ble_nus_c[i].handles.nus_tx_handle && 0 != m_ble_nus_c[i].handles.nus_rx_handle ) { ret_val = ble_nus_c_string_send(&m_ble_nus_c[i], data_array, index); if ((ret_val != NRF_ERROR_INVALID_STATE) && (ret_val != NRF_ERROR_BUSY)) { NRF_LOG_ERROR("CON HND id is %d, UUID %d, Tx %d, Rx %d, RETVAL %d", m_ble_nus_c[i].conn_handle, m_ble_nus_c[i].uuid_type, m_ble_nus_c[i].handles.nus_tx_handle, m_ble_nus_c[i].handles.nus_rx_handle, ret_val); //APP_ERROR_CHECK(ret_val); } } } 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_nus_c_evt_handler(ble_nus_c_t * p_ble_nus_c, ble_nus_c_evt_t const * p_ble_nus_evt) { ret_code_t err_code; switch (p_ble_nus_evt->evt_type) { case BLE_NUS_C_EVT_DISCOVERY_COMPLETE: NRF_LOG_INFO("Discovery on handle %d complete.", p_ble_nus_evt->conn_handle); // Burasi GAP event, discovery event degil. Burayý deðiþtirmek lazým err_code = ble_nus_c_handles_assign(&p_ble_nus_c[p_ble_nus_evt->conn_handle], p_ble_nus_evt->conn_handle, &p_ble_nus_evt->handles); APP_ERROR_CHECK(err_code); NRF_LOG_INFO("m_ble_nus_c[0x%x]: conn_handle = 0x%x, rx = 0x%x, tx = 0x%x, cccd = 0x%x", p_ble_nus_evt->conn_handle, m_ble_nus_c[p_ble_nus_evt->conn_handle].conn_handle, m_ble_nus_c[p_ble_nus_evt->conn_handle].handles.nus_rx_handle, m_ble_nus_c[p_ble_nus_evt->conn_handle].handles.nus_tx_handle, m_ble_nus_c[p_ble_nus_evt->conn_handle].handles.nus_tx_cccd_handle); err_code = ble_nus_c_tx_notif_enable(&p_ble_nus_c[p_ble_nus_evt->conn_handle]); //err_code = ble_nus_c_tx_notif_enable(p_ble_nus_c); if (err_code != NRF_ERROR_BUSY) { APP_ERROR_CHECK(err_code); } NRF_LOG_INFO("Connected to device with Nordic UART Service on handle %d.", p_ble_nus_evt->conn_handle); break; case BLE_NUS_C_EVT_NUS_TX_EVT: NRF_LOG_INFO("Uartttan data alindi."); ble_nus_chars_received_uart_print(p_ble_nus_evt->p_data, p_ble_nus_evt->data_len); break; case BLE_NUS_C_EVT_DISCONNECTED: NRF_LOG_INFO("Disconnected."); if( NULL == p_ble_nus_evt ) { NRF_LOG_INFO( "ple_ble_nus_evt is null" ); } /* else if( BLE_CONN_HANDLE_INVALID != p_ble_nus_evt->conn_handle ) { NRF_LOG_INFO("m_ble_nus_c[0x%x]: DISCONNECTED = 0x%x, rx = 0x%x, tx = 0x%x, cccd = 0x%x", p_ble_nus_evt->conn_handle, m_ble_nus_c[p_ble_nus_evt->conn_handle].conn_handle, m_ble_nus_c[p_ble_nus_evt->conn_handle].handles.nus_rx_handle, m_ble_nus_c[p_ble_nus_evt->conn_handle].handles.nus_tx_handle, m_ble_nus_c[p_ble_nus_evt->conn_handle].handles.nus_tx_cccd_handle); } */ else { NRF_LOG_INFO( "Event Handler connection pointer is null: conn_handle: %d", p_ble_nus_evt->conn_handle ); } scan_start(); break; } } /** @brief Database discovery initialization. */ 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 to sleep until a BLE event is received by the application. */ static void power_manage(void) { ret_code_t err_code = sd_app_evt_wait(); APP_ERROR_CHECK(err_code); } /** @brief Function for initializing the 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 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, NULL); 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 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 nus_c_init(void) { ret_code_t err_code; ble_nus_c_init_t init; init.evt_handler = ble_nus_c_evt_handler; for (uint32_t i = 0; i < NRF_SDH_BLE_CENTRAL_LINK_COUNT; i++) { err_code = ble_nus_c_init(&m_ble_nus_c[i], &init); APP_ERROR_CHECK(err_code); } /* ble_nus_c_init_t init[NRF_SDH_BLE_CENTRAL_LINK_COUNT]; for(uint32_t i = 0; i< NRF_SDH_BLE_CENTRAL_LINK_COUNT; i++) { init[i].evt_handler = ble_nus_c_evt_handler; err_code = ble_nus_c_init(&m_ble_nus_c[i], &init[i]); APP_ERROR_CHECK(err_code); } */ } int main(void) { log_init(); timer_init(); leds_init(); uart_init(); ble_stack_init(); gatt_init(); db_discovery_init(); //lbs_c_init(); nus_c_init(); ble_conn_state_init(); NRF_LOG_INFO("Multilink example started."); // Start scanning for peripherals and initiate connection to devices which advertise. scan_start(); // Turn on the LED to signal scanning. bsp_board_led_on(CENTRAL_SCANNING_LED); for (;;) { if (!NRF_LOG_PROCESS()) { power_manage(); } } }
I get no errors, but I should solve this "two times" problem. There should be a point that I failed to notice. Please help me on this. Thank you in advance.
By the way, same thing happens while sending data from central to peripherals. I mean, data is sent to handle 2, two times. :) but other handles receive the data as is is sent.