RE: Using NUS service to communicate between 2 devices

Petter Myhre — Fri, 15 Jul 2016 07:04:43 GMT

Antonio, if you have multiple unrelated questions, please ask them separately. Please consider taking our tour.

RE: Using NUS service to communicate between 2 devices

Petter Myhre — Thu, 14 Jul 2016 11:31:31 GMT

Great! Np :)

RE: Using NUS service to communicate between 2 devices

Antonio — Thu, 14 Jul 2016 11:24:22 GMT

Thank you very much PETTER MYHRE, you have solved my problem.. the problem was that when that i assign a NULL attribute handle. i going to copy the modified code to show you what i did. THANK YOU.

Connected event:

    case BLE_GAP_EVT_CONNECTED:
            {
    		
    					  
    					
    //					  erro_code = ble_nus_c_handles_assign(&m_ble_nus_c, p_gap_evt->conn_handle, NULL);
    //            APP_ERROR_CHECK(erro_code);
    										
    						erro_code = ble_db_discovery_start(&m_ble_db_discovery, p_gap_evt->conn_handle);
                APP_ERROR_CHECK(erro_code);
    					  logi("me conecte a periferico nus ");
    					if(erro_code != NRF_SUCCESS){
    							nrf_gpio_pin_write(24,0);
    					    nrf_delay_ms(1000);
    			        nrf_gpio_pin_write(24,1);
    						}
    					 
    						
    					  logi("mande el dato ");
    					 // Update LEDs status, and check if we should be looking for more
               // peripherals to connect to.
                LEDS_ON(CENTRAL_CONNECTED_LED);
                LEDS_OFF(CENTRAL_SCANNING_LED);
    						
            } break; // BLE_GAP_EVT_CONNECTED


/**@snippet [Handling events from the ble_nus_c module] */ 
static void ble_nus_c_evt_handler(ble_nus_c_t * p_ble_nus_c, const ble_nus_c_evt_t * p_ble_nus_evt)
{
		static uint8_t data_array[BLE_NUS_MAX_DATA_LEN];
		data_array[0] = 0x02;
		static uint8_t index = 19;
    uint32_t err_code;
    switch (p_ble_nus_evt->evt_type)
    {
        case BLE_NUS_C_EVT_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_rx_notif_enable(p_ble_nus_c);
            APP_ERROR_CHECK(err_code);
//            APPL_LOG("The device has the Nordic UART Service\r\n");
				 
						err_code = ble_nus_c_string_send(&m_ble_nus_c, data_array, index);
					  if(err_code == NRF_SUCCESS){
							nrf_gpio_pin_write(24,0);
					    nrf_delay_ms(100);
			        nrf_gpio_pin_write(24,1);
						}
            break;

Handling events from the ble_nus_c module:

static void ble_nus_c_evt_handler(ble_nus_c_t * p_ble_nus_c, const ble_nus_c_evt_t * p_ble_nus_evt)
{
		static uint8_t data_array[BLE_NUS_MAX_DATA_LEN];
		data_array[0] = 0x02;
		static uint8_t index = 19;
    uint32_t err_code;
    switch (p_ble_nus_evt->evt_type)
    {
        case BLE_NUS_C_EVT_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_rx_notif_enable(p_ble_nus_c);
            APP_ERROR_CHECK(err_code);
//            APPL_LOG("The device has the Nordic UART Service\r\n");
				 
						err_code = ble_nus_c_string_send(&m_ble_nus_c, data_array, index);
					  if(err_code == NRF_SUCCESS){
							nrf_gpio_pin_write(24,0);
					    nrf_delay_ms(100);
			        nrf_gpio_pin_write(24,1);
						}
            break;
        
				
				
        case BLE_NUS_C_EVT_NUS_RX_EVT:
            for (uint32_t i = 0; i < p_ble_nus_evt->data_len; i++)
            {
                while(app_uart_put( p_ble_nus_evt->p_data[i]) != NRF_SUCCESS);
            }
            break;
        
        case BLE_NUS_C_EVT_DISCONNECTED:
//            APPL_LOG("Disconnected\r\n");
            scan_start();
            break;
    }
}

RE: Using NUS service to communicate between 2 devices

Petter Myhre — Thu, 14 Jul 2016 11:00:40 GMT

Why are you calling ble_nus_c_handles_assign() with NULL as the last argument? And why are you calling it before ble_db_discovery_start()? Shouldn't you actually discover the services and wait for the BLE_NUS_C_EVT_DISCOVERY_COMPLETE event before you call ble_nus_c_handles_assign() with the actual attribute handles of the relevant characteristics and descriptors? So, ble_nus_c_string_send() return sNRF_SUCCESS but the nus_data_handler() is not called, do you receive a BLE_GATTS_EVT_WRITE event?