scanning of battery level

Question

HI nordic, 
 I had a NRF52832 DK which acts as central. In ble_app_uart_c example i need to scan the battery level of nearby beacons without connecting to the beacons 
 How can it be done. 
 Thank you

Sigurd · Accepted Answer

Hi, From the code you posted, I don't see that you have put the battery level into the manufacturer specific data field. If you want to advertise the battery level, you can put it into the "major" field like this: #include #include #include "ble_advertising.h" #include "nordic_common.h" #include "nrf.h" #include "nrf_soc.h" #include "nrf_drv_saadc.h" #include "nrf_sdm.h" #include "app_error.h" #include "ble.h" #include "ble_err.h" #include "ble_hci.h" #include "ble_srv_common.h" #include "ble_advdata.h" #include "ble_tps.h" #include "ble_ias.h" #include "ble_lls.h" #include "ble_bas.h" #include "ble_conn_params.h" #include "ble_conn_state.h" #include "sensorsim.h" #include "nrf_sdh.h" #include "nrf_sdh_soc.h" #include "nrf_sdh_ble.h" #include "app_timer.h" #include "app_error.h" #include "ble_ias_c.h" #include "app_util.h" #include "bsp_btn_ble.h" #include "ble_db_discovery.h" #include "peer_manager.h" #include "peer_manager_handler.h" #include "fds.h" #include "ble_conn_state.h" #include "nrf_ble_gatt.h" #include "nrf_ble_lesc.h" #include "nrf_ble_qwr.h" //#include "nrf_ble_scan.h" #include "nrf_pwr_mgmt.h" #include "nrf_fstorage.h" #include "nrf_log.h" #include "nrf_log_ctrl.h" #include "nrf_log_default_backends.h" #define DEVICE_NAME "NORDIC" #define APP_BLE_OBSERVER_PRIO 3 #define APP_BLE_CONN_CFG_TAG 1 #define BATTERY_LEVEL_MEAS_INTERVAL APP_TIMER_TICKS(120000) #define MIN_CONN_INTERVAL MSEC_TO_UNITS(500, UNIT_1_25_MS) #define MAX_CONN_INTERVAL MSEC_TO_UNITS(1000, UNIT_1_25_MS) #define SLAVE_LATENCY 0 #define CONN_SUP_TIMEOUT MSEC_TO_UNITS(4000, UNIT_10_MS) #define APP_ADV_INTERVAL 40 #define APP_ADV_TIMEOUT_IN_SECONDS 80 #define NON_CONNECTABLE_ADV_INTERVAL MSEC_TO_UNITS(100, UNIT_0_625_MS) #define APP_ADV_DURATION 18000 #define BLE_ADV_DIRECTED_ENABLED true #define BLE_ADV_DIRECTED_DISABLED false #define BLE_ADV_DIRECTED_SLOW_ENABLED true #define BLE_ADV_DIRECTED_SLOW_DISABLED false #define BLE_ADV_FAST_ENABLED true #define BLE_ADV_FAST_DISABLED false #define BLE_ADV_SLOW_ENABLED true #define BLE_ADV_SLOW_DISABLED false #define BLE_ADV_WHITELIST_ENABLED true #define BLE_ADV_WHITELIST_DISABLED false #define FIRST_CONN_PARAMS_UPDATE_DELAY APP_TIMER_TICKS(5000) #define NEXT_CONN_PARAMS_UPDATE_DELAY APP_TIMER_TICKS(30000) #define MAX_CONN_PARAMS_UPDATE_COUNT 3 #define SEC_PARAM_BOND 1 #define SEC_PARAM_MITM 0 #define SEC_PARAM_LESC 0 #define SEC_PARAM_KEYPRESS 0 #define SEC_PARAM_IO_CAPABILITIES BLE_GAP_IO_CAPS_NONE #define SEC_PARAM_OOB 0 #define SEC_PARAM_MIN_KEY_SIZE 7 #define SEC_PARAM_MAX_KEY_SIZE 16 #define BLE_GAP_ADV_TYPE_ADV_IND 0x00 #define BLE_GAP_ADV_TYPE_ADV_DIRECT_IND 0x01 #define BLE_GAP_ADV_TYPE_ADV_SCAN_IND 0x02 #define BLE_GAP_ADV_TYPE_ADV_NONCONN_IND 0x03 #define BLE_GAP_ADDR_TYPE_PUBLIC 0x00 #define BLE_GAP_ADDR_TYPE_RANDOM_STATIC 0x01 #define BLE_GAP_ADDR_TYPE_RANDOM_PRIVATE_RESOLVABLE 0x02 #define BLE_GAP_ADDR_TYPE_RANDOM_PRIVATE_NON_RESOLVABLE 0x03 #define INITIAL_LLS_ALERT_LEVEL BLE_CHAR_ALERT_LEVEL_NO_ALERT #define TX_POWER_LEVEL (-8) #define ADC_REF_VOLTAGE_IN_MILLIVOLTS 600 #define ADC_PRE_SCALING_COMPENSATION 6 #define DIODE_FWD_VOLT_DROP_MILLIVOLTS 270 #define ADC_RES_10BIT 1024 #define DEAD_BEEF 0xDEADBEEF #define APP_BEACON_INFO_LENGTH 0x17 #define APP_ADV_DATA_LENGTH 0x15 #define APP_DEVICE_TYPE 0x02 #define APP_MEASURED_RSSI 0xC5 #define APP_COMPANY_IDENTIFIER 0x004C #define APP_MAJOR_VALUE 0x00, 0x02 #define APP_MINOR_VALUE 0x00, 0x02 #define APP_BEACON_UUID 0x01, 0x12, 0x23, 0x34, \ 0x45, 0x56, 0x67, 0x78, \ 0x89, 0x9a, 0xab, 0xbc, \ 0xcd, 0xde, 0xef, 0xf0 #if defined(USE_UICR_FOR_MAJ_MIN_VALUES) #define MAJ_VAL_OFFSET_IN_BEACON_INFO 18 #define UICR_ADDRESS 0x10001080 #endif #define ADC_RESULT_IN_MILLI_VOLTS(ADC_VALUE)\ ((((ADC_VALUE) * ADC_REF_VOLTAGE_IN_MILLIVOLTS) / ADC_RES_10BIT) * ADC_PRE_SCALING_COMPENSATION) APP_TIMER_DEF(m_battery_timer_id); BLE_TPS_DEF(m_tps); BLE_IAS_DEF(m_ias, NRF_SDH_BLE_TOTAL_LINK_COUNT); BLE_LLS_DEF(m_lls); BLE_BAS_DEF(m_bas); BLE_IAS_C_DEF(m_ias_c); NRF_BLE_GATT_DEF(m_gatt); NRF_BLE_QWR_DEF(m_qwr); BLE_ADVERTISING_DEF(m_advertising); BLE_DB_DISCOVERY_DEF(m_ble_db_discovery); static volatile bool m_is_high_alert_signalled; static volatile bool m_is_ias_present = false; static nrf_saadc_value_t adc_buf[2]; static ble_uuid_t m_adv_uuids[] = { {BLE_UUID_IMMEDIATE_ALERT_SERVICE, BLE_UUID_TYPE_BLE}, {BLE_UUID_BATTERY_SERVICE, BLE_UUID_TYPE_BLE}, {BLE_UUID_TX_POWER_SERVICE, BLE_UUID_TYPE_BLE}, {BLE_UUID_LINK_LOSS_SERVICE, BLE_UUID_TYPE_BLE} }; static ble_gap_adv_params_t m_adv_params; static uint8_t m_adv_handle = BLE_GAP_ADV_SET_HANDLE_NOT_SET; static uint8_t m_enc_advdata_buffer1[BLE_GAP_ADV_SET_DATA_SIZE_MAX]; static uint8_t m_enc_scandata_buffer1[BLE_GAP_ADV_SET_DATA_SIZE_MAX]; static uint8_t m_enc_advdata_buffer2[BLE_GAP_ADV_SET_DATA_SIZE_MAX]; static uint8_t m_enc_scandata_buffer2[BLE_GAP_ADV_SET_DATA_SIZE_MAX]; static uint8_t adv_buffer_used = 1; static ble_gap_adv_data_t m_adv_data_buffer_1 = { .adv_data = { .p_data = m_enc_advdata_buffer1, .len = BLE_GAP_ADV_SET_DATA_SIZE_MAX }, .scan_rsp_data = { .p_data = m_enc_scandata_buffer1, .len = BLE_GAP_ADV_SET_DATA_SIZE_MAX } }; static ble_gap_adv_data_t m_adv_data_buffer_2 = { .adv_data = { .p_data = m_enc_advdata_buffer2, .len = BLE_GAP_ADV_SET_DATA_SIZE_MAX }, .scan_rsp_data = { .p_data = m_enc_scandata_buffer2, .len = BLE_GAP_ADV_SET_DATA_SIZE_MAX } }; static uint8_t m_beacon_info[APP_BEACON_INFO_LENGTH] = { APP_DEVICE_TYPE, APP_ADV_DATA_LENGTH, APP_BEACON_UUID, APP_MAJOR_VALUE, APP_MINOR_VALUE, APP_MEASURED_RSSI }; static void on_ias_evt(ble_ias_t * p_ias, ble_ias_evt_t * p_evt); static void on_lls_evt(ble_lls_t * p_lls, ble_lls_evt_t * p_evt); static void on_ias_c_evt(ble_ias_c_t * p_lls, ble_ias_c_evt_t * p_evt); static void on_bas_evt(ble_bas_t * p_bas, ble_bas_evt_t * p_evt); static void advertising_init(void); static void advertising_start(bool erase_bonds); void assert_nrf_callback(uint16_t line_num, const uint8_t * p_file_name) { app_error_handler(DEAD_BEEF, line_num, p_file_name); } static void service_error_handler(uint32_t nrf_error) { APP_ERROR_HANDLER(nrf_error); } static void pm_evt_handler(pm_evt_t const * p_evt) { pm_handler_on_pm_evt(p_evt); pm_handler_flash_clean(p_evt); switch (p_evt->evt_id) { case PM_EVT_PEERS_DELETE_SUCCEEDED: advertising_start(false); break; default: break; } } void saadc_event_handler(nrf_drv_saadc_evt_t const * p_event) { if (p_event->type == NRF_DRV_SAADC_EVT_DONE) { nrf_saadc_value_t adc_result; uint16_t batt_lvl_in_milli_volts; uint8_t percentage_batt_lvl; uint32_t err_code; adc_result = p_event->data.done.p_buffer[0]; err_code = nrf_drv_saadc_buffer_convert(p_event->data.done.p_buffer, 1); APP_ERROR_CHECK(err_code); batt_lvl_in_milli_volts = ADC_RESULT_IN_MILLI_VOLTS(adc_result) + DIODE_FWD_VOLT_DROP_MILLIVOLTS; percentage_batt_lvl = battery_level_in_percent(batt_lvl_in_milli_volts); NRF_LOG_INFO("percentage_batt_lvl: %d",percentage_batt_lvl); NRF_LOG_INFO("batt_lvl_in_milli_volts: %d",batt_lvl_in_milli_volts); //Update advertising data with battery level ble_advdata_t advdata; ble_advdata_manuf_data_t manuf_specific_data; manuf_specific_data.company_identifier = APP_COMPANY_IDENTIFIER; manuf_specific_data.data.p_data = (uint8_t *) m_beacon_info; manuf_specific_data.data.size = APP_BEACON_INFO_LENGTH; m_beacon_info[18] = 0x00; m_beacon_info[19] = percentage_batt_lvl; // Battery percentage in "Major" value m_beacon_info[20] = 0x00; memset(&advdata, 0, sizeof(advdata)); advdata.flags = BLE_GAP_ADV_FLAGS_LE_ONLY_GENERAL_DISC_MODE; advdata.p_manuf_specific_data = &manuf_specific_data; if(adv_buffer_used == 1) { err_code = ble_advdata_encode(&advdata, m_adv_data_buffer_2.adv_data.p_data, &m_adv_data_buffer_2.adv_data.len); APP_ERROR_CHECK(err_code); err_code = sd_ble_gap_adv_set_configure(&m_adv_handle, &m_adv_data_buffer_2, NULL); APP_ERROR_CHECK(err_code); adv_buffer_used = 2; } else { err_code = ble_advdata_encode(&advdata, m_adv_data_buffer_1.adv_data.p_data, &m_adv_data_buffer_1.adv_data.len); APP_ERROR_CHECK(err_code); err_code = sd_ble_gap_adv_set_configure(&m_adv_handle, &m_adv_data_buffer_1, NULL); APP_ERROR_CHECK(err_code); adv_buffer_used = 1; } err_code = ble_bas_battery_level_update(&m_bas, percentage_batt_lvl, BLE_CONN_HANDLE_ALL); if ((err_code != NRF_SUCCESS) && (err_code != NRF_ERROR_INVALID_STATE) && (err_code != NRF_ERROR_RESOURCES) && (err_code != NRF_ERROR_BUSY) && (err_code != BLE_ERROR_GATTS_SYS_ATTR_MISSING) ) { APP_ERROR_HANDLER(err_code); } } } static void db_disc_handler(ble_db_discovery_evt_t * p_evt) { ble_ias_c_on_db_disc_evt(&m_ias_c, p_evt); } static void adc_configure(void) { ret_code_t err_code = nrf_drv_saadc_init(NULL, saadc_event_handler); APP_ERROR_CHECK(err_code); nrf_saadc_channel_config_t config = NRF_DRV_SAADC_DEFAULT_CHANNEL_CONFIG_SE(NRF_SAADC_INPUT_VDD); err_code = nrf_drv_saadc_channel_init(0, &config); APP_ERROR_CHECK(err_code); err_code = nrf_drv_saadc_buffer_convert(&adc_buf[0], 1); APP_ERROR_CHECK(err_code); err_code = nrf_drv_saadc_buffer_convert(&adc_buf[1], 1); APP_ERROR_CHECK(err_code); } static void battery_level_meas_timeout_handler(void * p_context) { UNUSED_PARAMETER(p_context); ret_code_t err_code; err_code = nrf_drv_saadc_sample(); APP_ERROR_CHECK(err_code); } static void timers_init(void) { ret_code_t err_code; err_code = app_timer_init(); APP_ERROR_CHECK(err_code); err_code = app_timer_create(&m_battery_timer_id, APP_TIMER_MODE_REPEATED, battery_level_meas_timeout_handler); APP_ERROR_CHECK(err_code); } 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); err_code = sd_ble_gap_appearance_set(BLE_APPEARANCE_GENERIC_KEYRING); 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); } static void gatt_init(void) { ret_code_t err_code = nrf_ble_gatt_init(&m_gatt, NULL); APP_ERROR_CHECK(err_code); } static void sleep_mode_enter(void) { ret_code_t err_code; err_code = bsp_indication_set(BSP_INDICATE_IDLE); APP_ERROR_CHECK(err_code); err_code = bsp_btn_ble_sleep_mode_prepare(); APP_ERROR_CHECK(err_code); err_code = sd_power_system_off(); APP_ERROR_CHECK(err_code); } 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; // BLE_ADV_EVT_FAST case BLE_ADV_EVT_IDLE: sleep_mode_enter(); break; // BLE_ADV_EVT_IDLE default: break; } } 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); } static void advertising_init(void) { uint32_t err_code; ble_advdata_t advdata; ble_advdata_t scandata; uint8_t flags = BLE_GAP_ADV_FLAGS_LE_ONLY_GENERAL_DISC_MODE; ble_advdata_manuf_data_t manuf_specific_data; manuf_specific_data.company_identifier = APP_COMPANY_IDENTIFIER; #if defined(USE_UICR_FOR_MAJ_MIN_VALUES) uint16_t major_value = ((*(uint32_t *)UICR_ADDRESS) & 0xFFFF0000) >> 16; uint16_t minor_value = ((*(uint32_t *)UICR_ADDRESS) & 0x0000FFFF); uint8_t index = MAJ_VAL_OFFSET_IN_BEACON_INFO; m_beacon_info[index++] = MSB_16(major_value); m_beacon_info[index++] = LSB_16(major_value); m_beacon_info[index++] = MSB_16(minor_value); m_beacon_info[index++] = LSB_16(minor_value); #endif manuf_specific_data.data.p_data = (uint8_t *) m_beacon_info; manuf_specific_data.data.size = APP_BEACON_INFO_LENGTH; m_beacon_info[18] = 0x00; m_beacon_info[19] = 100; // init battery m_beacon_info[20] = 0x00; m_beacon_info[21] = 0x00; memset(&advdata, 0, sizeof(advdata)); advdata.flags = flags; advdata.p_manuf_specific_data = &manuf_specific_data; memset(&m_adv_params, 0, sizeof(m_adv_params)); m_adv_params.properties.type = BLE_GAP_ADV_TYPE_CONNECTABLE_SCANNABLE_UNDIRECTED; m_adv_params.p_peer_addr = NULL; m_adv_params.filter_policy = BLE_GAP_ADV_FP_ANY; m_adv_params.interval = NON_CONNECTABLE_ADV_INTERVAL; m_adv_params.duration = 0; err_code = ble_advdata_encode(&advdata, m_adv_data_buffer_1.adv_data.p_data, &m_adv_data_buffer_1.adv_data.len); APP_ERROR_CHECK(err_code); memset(&scandata, 0, sizeof(scandata)); scandata.name_type = BLE_ADVDATA_FULL_NAME; scandata.uuids_complete.uuid_cnt = sizeof(m_adv_uuids) / sizeof(m_adv_uuids[0]); scandata.uuids_complete.p_uuids = m_adv_uuids; ble_gap_addr_t gap_address; gap_address.addr_type = BLE_GAP_ADDR_TYPE_PUBLIC; memcpy(&gap_address.addr, "\xbb\xaa\xcc\xbb\xaa\xAC", sizeof(gap_address.addr)); err_code = sd_ble_gap_addr_set(&gap_address); APP_ERROR_CHECK(err_code); err_code = ble_advdata_encode(&scandata, m_adv_data_buffer_1.scan_rsp_data.p_data, &m_adv_data_buffer_1.scan_rsp_data.len); APP_ERROR_CHECK(err_code); err_code = ble_advdata_encode(&scandata, m_adv_data_buffer_2.scan_rsp_data.p_data, &m_adv_data_buffer_2.scan_rsp_data.len); APP_ERROR_CHECK(err_code); err_code = sd_ble_gap_adv_set_configure(&m_adv_handle, &m_adv_data_buffer_1, &m_adv_params); APP_ERROR_CHECK(err_code); } static void advertising_start(bool erase_bonds) { ret_code_t err_code; if (erase_bonds == true){ delete_bonds(); } else { err_code = sd_ble_gap_adv_start(m_adv_handle, APP_BLE_CONN_CFG_TAG); APP_ERROR_CHECK(err_code); err_code = bsp_indication_set(BSP_INDICATE_ADVERTISING); APP_ERROR_CHECK(err_code); } } ///**@brief Function for initializing the Advertising functionality. // * // * @details Encodes the required advertising data and passes it to the stack. // * Also builds a structure to be passed to the stack when starting advertising. // */ //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_LIMITED_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); //} static void nrf_qwr_error_handler(uint32_t nrf_error) { APP_ERROR_HANDLER(nrf_error); } static void qwr_init(void) { ret_code_t err_code; nrf_ble_qwr_init_t qwr_init_obj = {0}; qwr_init_obj.error_handler = nrf_qwr_error_handler; err_code = nrf_ble_qwr_init(&m_qwr, &qwr_init_obj); APP_ERROR_CHECK(err_code); } static void tps_init(void) { ret_code_t err_code; ble_tps_init_t tps_init_obj; memset(&tps_init_obj, 0, sizeof(tps_init_obj)); tps_init_obj.initial_tx_power_level = TX_POWER_LEVEL; tps_init_obj.tpl_rd_sec = SEC_JUST_WORKS; err_code = ble_tps_init(&m_tps, &tps_init_obj); APP_ERROR_CHECK(err_code); } static void ias_init(void) { ret_code_t err_code; ble_ias_init_t ias_init_obj; memset(&ias_init_obj, 0, sizeof(ias_init_obj)); ias_init_obj.evt_handler = on_ias_evt; ias_init_obj.alert_wr_sec = SEC_JUST_WORKS; err_code = ble_ias_init(&m_ias, &ias_init_obj); APP_ERROR_CHECK(err_code); } static void lls_init(void) { ret_code_t err_code; ble_lls_init_t lls_init_obj; // Initialize Link Loss Service memset(&lls_init_obj, 0, sizeof(lls_init_obj)); lls_init_obj.evt_handler = on_lls_evt; lls_init_obj.error_handler = service_error_handler; lls_init_obj.initial_alert_level = INITIAL_LLS_ALERT_LEVEL; lls_init_obj.alert_level_rd_sec = SEC_JUST_WORKS; lls_init_obj.alert_level_wr_sec = SEC_JUST_WORKS; err_code = ble_lls_init(&m_lls, &lls_init_obj); APP_ERROR_CHECK(err_code); } static void bas_init(void) { ret_code_t err_code; ble_bas_init_t bas_init_obj; memset(&bas_init_obj, 0, sizeof(bas_init_obj)); bas_init_obj.evt_handler = on_bas_evt; bas_init_obj.support_notification = true; bas_init_obj.p_report_ref = NULL; bas_init_obj.initial_batt_level = 100; bas_init_obj.bl_rd_sec = SEC_OPEN; bas_init_obj.bl_cccd_wr_sec = SEC_OPEN; bas_init_obj.bl_report_rd_sec = SEC_OPEN; err_code = ble_bas_init(&m_bas, &bas_init_obj); APP_ERROR_CHECK(err_code); } static void ias_client_init(void) { ret_code_t err_code; ble_ias_c_init_t ias_c_init_obj; memset(&ias_c_init_obj, 0, sizeof(ias_c_init_obj)); m_is_high_alert_signalled = false; ias_c_init_obj.evt_handler = on_ias_c_evt; ias_c_init_obj.error_handler = service_error_handler; err_code = ble_ias_c_init(&m_ias_c, &ias_c_init_obj); APP_ERROR_CHECK(err_code); } static void services_init(void) { qwr_init(); tps_init(); ias_init(); lls_init(); bas_init(); ias_client_init(); } static void db_discovery_init(void) { ret_code_t err_code = ble_db_discovery_init(db_disc_handler); APP_ERROR_CHECK(err_code); } static void conn_params_error_handler(uint32_t nrf_error) { APP_ERROR_HANDLER(nrf_error); } 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 = true; cp_init.evt_handler = NULL; cp_init.error_handler = conn_params_error_handler; err_code = ble_conn_params_init(&cp_init); APP_ERROR_CHECK(err_code); } static void alert_signal(uint8_t alert_level) { ret_code_t err_code; switch (alert_level) { case BLE_CHAR_ALERT_LEVEL_NO_ALERT: NRF_LOG_INFO("No Alert."); err_code = bsp_indication_set(BSP_INDICATE_ALERT_OFF); APP_ERROR_CHECK(err_code); break; // BLE_CHAR_ALERT_LEVEL_NO_ALERT case BLE_CHAR_ALERT_LEVEL_MILD_ALERT: NRF_LOG_INFO("Mild Alert."); err_code = bsp_indication_set(BSP_INDICATE_ALERT_0); APP_ERROR_CHECK(err_code); break; // BLE_CHAR_ALERT_LEVEL_MILD_ALERT case BLE_CHAR_ALERT_LEVEL_HIGH_ALERT: NRF_LOG_INFO("HIGH Alert."); err_code = bsp_indication_set(BSP_INDICATE_ALERT_3); APP_ERROR_CHECK(err_code); break; // BLE_CHAR_ALERT_LEVEL_HIGH_ALERT default: break; } } static void on_ias_evt(ble_ias_t * p_ias, ble_ias_evt_t * p_evt) { switch (p_evt->evt_type) { case BLE_IAS_EVT_ALERT_LEVEL_UPDATED: if (p_evt->p_link_ctx != NULL) { alert_signal(p_evt->p_link_ctx->alert_level); } break; // BLE_IAS_EVT_ALERT_LEVEL_UPDATED default: // No implementation needed. break; } } static void on_lls_evt(ble_lls_t * p_lls, ble_lls_evt_t * p_evt) { switch (p_evt->evt_type) { case BLE_LLS_EVT_LINK_LOSS_ALERT: alert_signal(p_evt->params.alert_level); break; // BLE_LLS_EVT_LINK_LOSS_ALERT default: // No implementation needed. break; } } static void on_ias_c_evt(ble_ias_c_t * p_ias_c, ble_ias_c_evt_t * p_evt) { ret_code_t err_code; switch (p_evt->evt_type) { case BLE_IAS_C_EVT_DISCOVERY_COMPLETE: // IAS is found on peer. The Find Me Locator functionality of this app will work. err_code = ble_ias_c_handles_assign(&m_ias_c, p_evt->conn_handle, p_evt->alert_level.handle_value); APP_ERROR_CHECK(err_code); m_is_ias_present = true; break; // BLE_IAS_C_EVT_DISCOVERY_COMPLETE case BLE_IAS_C_EVT_DISCOVERY_FAILED: // IAS is not found on peer. The Find Me Locator functionality of this app will NOT work. break; // BLE_IAS_C_EVT_DISCOVERY_FAILED case BLE_IAS_C_EVT_DISCONN_COMPLETE: // Disable alert buttons m_is_ias_present = false; break; // BLE_IAS_C_EVT_DISCONN_COMPLETE default: break; } } static void on_bas_evt(ble_bas_t * p_bas, ble_bas_evt_t * p_evt) { ret_code_t err_code; switch (p_evt->evt_type) { case BLE_BAS_EVT_NOTIFICATION_ENABLED: // Start battery timer err_code = app_timer_start(m_battery_timer_id, BATTERY_LEVEL_MEAS_INTERVAL, NULL); APP_ERROR_CHECK(err_code); break; // BLE_BAS_EVT_NOTIFICATION_ENABLED case BLE_BAS_EVT_NOTIFICATION_DISABLED: err_code = app_timer_stop(m_battery_timer_id); APP_ERROR_CHECK(err_code); break; // BLE_BAS_EVT_NOTIFICATION_DISABLED default: // No implementation needed. break; } } 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); // Assign connection handle to the Queued Write module. err_code = nrf_ble_qwr_conn_handle_assign(&m_qwr, p_ble_evt->evt.gap_evt.conn_handle); APP_ERROR_CHECK(err_code); // Discover peer's services. err_code = ble_db_discovery_start(&m_ble_db_discovery, p_ble_evt->evt.gap_evt.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; } } 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); } 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); } static void bsp_event_handler(bsp_event_t event) { ret_code_t err_code; switch (event) { case BSP_EVENT_SLEEP: sleep_mode_enter(); break; case BSP_EVENT_DISCONNECT: err_code = sd_ble_gap_disconnect(m_ias_c.conn_handle, BLE_HCI_REMOTE_USER_TERMINATED_CONNECTION); if (err_code != NRF_ERROR_INVALID_STATE) { APP_ERROR_CHECK(err_code); } break; case BSP_EVENT_KEY_0: { if (m_is_ias_present) { if (!m_is_high_alert_signalled) { err_code = ble_ias_c_send_alert_level(&m_ias_c, BLE_CHAR_ALERT_LEVEL_HIGH_ALERT); } else { err_code = ble_ias_c_send_alert_level(&m_ias_c, BLE_CHAR_ALERT_LEVEL_NO_ALERT); } if (err_code == NRF_SUCCESS) { m_is_high_alert_signalled = !m_is_high_alert_signalled; } else if ( (err_code != NRF_ERROR_RESOURCES) && (err_code != BLE_ERROR_GATTS_SYS_ATTR_MISSING) && (err_code != NRF_ERROR_NOT_FOUND) ) { APP_ERROR_HANDLER(err_code); } } } break; case BSP_EVENT_KEY_1: NRF_LOG_INFO("Alert Off."); err_code = bsp_indication_set(BSP_INDICATE_ALERT_OFF); APP_ERROR_CHECK(err_code); break; default: break; } } 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); } static void log_init(void) { ret_code_t err_code = NRF_LOG_INIT(NULL); APP_ERROR_CHECK(err_code); NRF_LOG_DEFAULT_BACKENDS_INIT(); } static void power_management_init(void) { ret_code_t err_code; err_code = nrf_pwr_mgmt_init(); APP_ERROR_CHECK(err_code); } 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_DELETE_SUCEEDED event. // } // else // { // uint32_t err_code = ble_advertising_start(&m_advertising, BLE_ADV_MODE_FAST); // // APP_ERROR_CHECK(err_code); // } //} static void tx_power_set(void) { ret_code_t err_code = sd_ble_gap_tx_power_set(BLE_GAP_TX_POWER_ROLE_ADV, m_advertising.adv_handle, TX_POWER_LEVEL); APP_ERROR_CHECK(err_code); } int main(void) { bool erase_bonds; // Initialize. log_init(); timers_init(); buttons_leds_init(&erase_bonds); power_management_init(); ble_stack_init(); adc_configure(); gap_params_init(); gatt_init(); advertising_init(); db_discovery_init(); services_init(); conn_params_init(); peer_manager_init(); // Start execution. NRF_LOG_INFO("Proximity example started."); advertising_start(erase_bonds); tx_power_set(); battery_level_meas_timeout_handler(NULL); // Start battery timer uint32_t err_code = app_timer_start(m_battery_timer_id, BATTERY_LEVEL_MEAS_INTERVAL, NULL); APP_ERROR_CHECK(err_code); // Enter main loop. for (;;) { idle_state_handle(); } } Here is some scanner code based on ble_app_uart_c that you might find useful. /** * 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 #include #include #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_nus_c.h" #include "nrf_ble_gatt.h" #include "nrf_pwr_mgmt.h" #include "nrf_ble_scan.h" #include "nrf_log.h" #include "nrf_log_ctrl.h" #include "nrf_log_default_backends.h" #define APP_BLE_CONN_CFG_TAG 1 /**< Tag that refers to the BLE stack configuration set with @ref sd_ble_cfg_set. The default tag is @ref BLE_CONN_CFG_TAG_DEFAULT. */ #define APP_BLE_OBSERVER_PRIO 3 /**< BLE observer priority of the application. There is no 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 NUS_SERVICE_UUID_TYPE BLE_UUID_TYPE_VENDOR_BEGIN /**< UUID type for the Nordic UART Service (vendor specific). */ #define ECHOBACK_BLE_UART_DATA 1 /**< Echo the UART data that is received over the Nordic UART Service (NUS) back to the sender. */ BLE_NUS_C_DEF(m_ble_nus_c); /**< BLE Nordic UART Service (NUS) client instance. */ NRF_BLE_GATT_DEF(m_gatt); /**< GATT module instance. */ BLE_DB_DISCOVERY_DEF(m_db_disc); /**< Database discovery module instance. */ NRF_BLE_SCAN_DEF(m_scan); /**< Scanning Module instance. */ 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. */ #define SCAN_LIST_REFRESH_INTERVAL 10000 // 10 sec #define FOUND_DEVICE_REFRESH_TIME APP_TIMER_TICKS(SCAN_LIST_REFRESH_INTERVAL) /**< Time after which the device list is clean and refreshed. */ #define DEVICE_NAME_MAX_SIZE 20 #define DEVICE_TO_FIND_MAX 20 #define COMPANY_ID_0 0x4C #define COMPANY_ID_1 0x00 #define add_only_specific_company_identifiers_enabled 1 // Set to 1 or 0 typedef struct { bool is_not_empty; /**< Indicates that the structure is not empty. */ uint16_t size; /**< Size of manuf data. */ uint8_t addr[BLE_GAP_ADDR_LEN]; /**< Device address. */ char dev_name[DEVICE_NAME_MAX_SIZE]; /**< Device name. */ uint8_t manuf_buffer[BLE_GAP_ADV_SET_DATA_SIZE_MAX]; /**< Buffer for storing an manuf data. */ } scanned_device_t; void device_list_print(scanned_device_t * p_device); scanned_device_t m_device[DEVICE_TO_FIND_MAX]; /**< Stores device info from scan data. */ void scan_device_info_clear(void) { memset(m_device, 0, sizeof(m_device)); } scanned_device_t * scan_device_info_get(void) { return m_device; } typedef struct { uint8_t * p_data; /**< Pointer to data. */ uint16_t data_len; /**< Length of data. */ } data_t; static void device_to_list_add(ble_gap_evt_adv_report_t const * p_adv_report) { uint8_t idx = 0; uint16_t dev_name_offset = 0; uint16_t field_len; data_t adv_data; // Initialize advertisement report for parsing adv_data.p_data = (uint8_t *)p_adv_report->data.p_data; adv_data.data_len = p_adv_report->data.len; // Search for manuf_specific_data. uint8_t * p_manuf = ble_advdata_parse(p_adv_report->data.p_data, p_adv_report->data.len, BLE_GAP_AD_TYPE_MANUFACTURER_SPECIFIC_DATA); // If manuf_specific_data is not found, then return. if(p_manuf == NULL) { return; } for ( idx = 0; idx < DEVICE_TO_FIND_MAX; idx++) { // If address is duplicated, then return. if (memcmp(p_adv_report->peer_addr.addr, m_device[idx].addr, sizeof(p_adv_report->peer_addr.addr)) == 0) { return; } } // Device is not in the list. for (idx = 0; idx < DEVICE_TO_FIND_MAX; idx++) { if (!m_device[idx].is_not_empty) // We find an empty entry { uint16_t data_offset = 0; uint8_t manuf_len; manuf_len = ble_advdata_search(p_adv_report->data.p_data, p_adv_report->data.len, &data_offset, BLE_GAP_AD_TYPE_MANUFACTURER_SPECIFIC_DATA); uint8_t company_id[2]; memset(company_id,0,2); memcpy(company_id, p_manuf, 2); if(add_only_specific_company_identifiers_enabled == 0) { // We add all devices with manuf_specific_data to the list m_device[idx].is_not_empty = true; //validating the list record memset(m_device[idx].manuf_buffer,0,BLE_GAP_ADV_SET_DATA_SIZE_MAX); memcpy(m_device[idx].manuf_buffer, p_manuf, manuf_len); m_device[idx].size = manuf_len; memset(m_device[idx].addr, 0, sizeof(p_adv_report->peer_addr.addr)); memcpy(m_device[idx].addr, p_adv_report->peer_addr.addr, sizeof(p_adv_report->peer_addr.addr)); return; } if( (add_only_specific_company_identifiers_enabled == 1) && (company_id[0] == COMPANY_ID_0 ) && (company_id[1] == COMPANY_ID_1) ) { // We add ONLY devices with correct company ID to the list m_device[idx].is_not_empty = true; //validating the list record memset(m_device[idx].manuf_buffer,0,BLE_GAP_ADV_SET_DATA_SIZE_MAX); memcpy(m_device[idx].manuf_buffer, p_manuf, manuf_len); m_device[idx].size = manuf_len; memset(m_device[idx].addr, 0, sizeof(p_adv_report->peer_addr.addr)); memcpy(m_device[idx].addr, p_adv_report->peer_addr.addr, sizeof(p_adv_report->peer_addr.addr)); // NRF_LOG_INFO("MANUFACTURER_SPECIFIC_DATA FOUND with correct company_id"); return; } //NRF_LOG_HEXDUMP_INFO(m_device[idx].manuf_buffer,m_device[idx].size); return; } } } /**@brief Function for printing the devices. * *@details Function print list of devices. * * * @param[in] device Pointer to the struct storing the scanned devices. */ void device_list_print(scanned_device_t * p_device) { NRF_LOG_INFO("==== PRINTING DEVICE LIST ==="); for (uint8_t i = 0; i < DEVICE_TO_FIND_MAX; i++) { if (p_device[i].is_not_empty) { NRF_LOG_INFO("Device-addr %02x:%02x:%02x:%02x:%02x:%02x", p_device[i].addr[5], p_device[i].addr[4], p_device[i].addr[3], p_device[i].addr[2], p_device[i].addr[1], p_device[i].addr[0] ); NRF_LOG_INFO("Major Value battery percentage: %d",p_device[i].manuf_buffer[21]); } } NRF_LOG_INFO("=========="); scan_device_info_clear(); } /**@brief NUS UUID. */ static ble_uuid_t const m_nus_uuid = { .uuid = BLE_UUID_NUS_SERVICE, .type = NUS_SERVICE_UUID_TYPE }; /**@brief Function for handling asserts in the SoftDevice. * * @details This function is called in case of an assert in the SoftDevice. * * @warning This handler is only an example and is not meant for the 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 starting scanning. */ static void scan_start(void) { ret_code_t ret; ret = nrf_ble_scan_start(&m_scan); APP_ERROR_CHECK(ret); ret = bsp_indication_set(BSP_INDICATE_SCANNING); APP_ERROR_CHECK(ret); } /**@brief Function for handling Scanning Module events. */ static void scan_evt_handler(scan_evt_t const * p_scan_evt) { ret_code_t err_code; switch(p_scan_evt->scan_evt_id) { case NRF_BLE_SCAN_EVT_CONNECTING_ERROR: { err_code = p_scan_evt->params.connecting_err.err_code; APP_ERROR_CHECK(err_code); } break; case NRF_BLE_SCAN_EVT_CONNECTED: { ble_gap_evt_connected_t const * p_connected = p_scan_evt->params.connected.p_connected; // Scan is automatically stopped by the connection. NRF_LOG_INFO("Connecting to target %02x%02x%02x%02x%02x%02x", p_connected->peer_addr.addr[0], p_connected->peer_addr.addr[1], p_connected->peer_addr.addr[2], p_connected->peer_addr.addr[3], p_connected->peer_addr.addr[4], p_connected->peer_addr.addr[5] ); } break; case NRF_BLE_SCAN_EVT_SCAN_TIMEOUT: { NRF_LOG_INFO("Scan timed out."); scan_start(); } break; case NRF_BLE_SCAN_EVT_NOT_FOUND: device_to_list_add(p_scan_evt->params.p_not_found); break; default: break; } } /**@brief Function for handling the list_timer event, */ static void adv_list_timer_handle(void * p_context) { // Print devices scanned_device_t * p_device_list = scan_device_info_get(); device_list_print(p_device_list); //scan_device_info_clear(); } /**@brief Function for initializing the scanning and setting the filters. */ static void scan_init(void) { ret_code_t err_code; nrf_ble_scan_init_t init_scan; memset(&init_scan, 0, sizeof(init_scan)); init_scan.connect_if_match = true; init_scan.conn_cfg_tag = APP_BLE_CONN_CFG_TAG; err_code = nrf_ble_scan_init(&m_scan, &init_scan, scan_evt_handler); APP_ERROR_CHECK(err_code); err_code = nrf_ble_scan_filter_set(&m_scan, SCAN_UUID_FILTER, &m_nus_uuid); APP_ERROR_CHECK(err_code); err_code = nrf_ble_scan_filters_enable(&m_scan, NRF_BLE_SCAN_UUID_FILTER, false); APP_ERROR_CHECK(err_code); } /**@brief Function for handling database discovery events. * * @details This function is a callback function to handle events from the database discovery module. * Depending on the UUIDs that are discovered, this function forwards the events * to their respective services. * * @param[in] p_event Pointer to the database discovery event. */ static void db_disc_handler(ble_db_discovery_evt_t * p_evt) { ble_nus_c_on_db_disc_evt(&m_ble_nus_c, p_evt); } /**@brief Function for handling characters received by the Nordic UART Service (NUS). * * @details This function takes a list of characters of length data_len and prints the characters out on UART. * If @ref ECHOBACK_BLE_UART_DATA is set, the data is sent back to sender. */ static void ble_nus_chars_received_uart_print(uint8_t * p_data, uint16_t data_len) { ret_code_t ret_val; NRF_LOG_DEBUG("Receiving data."); NRF_LOG_HEXDUMP_DEBUG(p_data, data_len); for (uint32_t i = 0; i < data_len; i++) { do { ret_val = app_uart_put(p_data[i]); if ((ret_val != NRF_SUCCESS) && (ret_val != NRF_ERROR_BUSY)) { NRF_LOG_ERROR("app_uart_put failed for index 0x%04x.", i); APP_ERROR_CHECK(ret_val); } } while (ret_val == NRF_ERROR_BUSY); } if (p_data[data_len-1] == ' ') { while (app_uart_put(' ') == NRF_ERROR_BUSY); } if (ECHOBACK_BLE_UART_DATA) { // Send data back to the peripheral. do { ret_val = ble_nus_c_string_send(&m_ble_nus_c, p_data, data_len); if ((ret_val != NRF_SUCCESS) && (ret_val != NRF_ERROR_BUSY)) { NRF_LOG_ERROR("Failed sending NUS message. Error 0x%x. ", ret_val); APP_ERROR_CHECK(ret_val); } } while (ret_val == NRF_ERROR_BUSY); } } /**@brief Function for handling app_uart events. * * @details This function receives a single character from the app_uart module and appends it to * a string. The string is sent over BLE when the last character received is a * 'new line' ' ' (hex 0x0A) or if the string reaches the maximum data length. */ void uart_event_handle(app_uart_evt_t * p_event) { static uint8_t data_array[BLE_NUS_MAX_DATA_LEN]; 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] == ' ') || (index >= (m_ble_nus_max_data_len))) { 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_RESOURCES) ) { APP_ERROR_CHECK(ret_val); } } while (ret_val == NRF_ERROR_RESOURCES); 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 Nordic UART Service (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 complete."); err_code = ble_nus_c_handles_assign(p_ble_nus_c, p_ble_nus_evt->conn_handle, &p_ble_nus_evt->handles); APP_ERROR_CHECK(err_code); err_code = ble_nus_c_tx_notif_enable(p_ble_nus_c); APP_ERROR_CHECK(err_code); NRF_LOG_INFO("Connected to device with Nordic UART Service."); break; case BLE_NUS_C_EVT_NUS_TX_EVT: ble_nus_chars_received_uart_print(p_ble_nus_evt->p_data, p_ble_nus_evt->data_len); break; case BLE_NUS_C_EVT_DISCONNECTED: NRF_LOG_INFO("Disconnected."); scan_start(); break; } } /**@snippet [Handling events from the ble_nus_c module] */ /** * @brief Function for handling 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: err_code = ble_nus_c_handles_assign(&m_ble_nus_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_DISCONNECTED: NRF_LOG_INFO("Disconnected. conn_handle: 0x%x, reason: 0x%x", p_gap_evt->conn_handle, p_gap_evt->params.disconnected.reason); 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_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."); m_ble_nus_max_data_len = p_evt->params.att_mtu_effective - OPCODE_LENGTH - HANDLE_LENGTH; NRF_LOG_INFO("Ble NUS max data length set to 0x%X(%d)", m_ble_nus_max_data_len, m_ble_nus_max_data_len); } } /**@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_nus_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 Nordic UART Service (NUS) client. */ static void nus_c_init(void) { ret_code_t err_code; ble_nus_c_init_t init; init.evt_handler = ble_nus_c_evt_handler; err_code = ble_nus_c_init(&m_ble_nus_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); // Timer for refreshing scanned devices data. APP_TIMER_DEF(adv_list_timer); err_code = app_timer_create(&adv_list_timer, APP_TIMER_MODE_REPEATED, adv_list_timer_handle); APP_ERROR_CHECK(err_code); err_code = app_timer_start(adv_list_timer, FOUND_DEVICE_REFRESH_TIME, NULL); 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 Handles any pending log operations, then sleeps 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(); nus_c_init(); scan_init(); // Start execution. printf("BLE UART central example started. "); NRF_LOG_INFO("BLE UART central example started."); NRF_LOG_INFO("Printing scan list in %d ms",SCAN_LIST_REFRESH_INTERVAL); scan_start(); // Enter main loop. for (;;) { idle_state_handle(); } }

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