RE: how to read the data from peripheral and send the data over ble

Sunil vignesh — Mon, 19 Nov 2018 06:51:23 GMT

Hi Saral,

If you want to send only the data that you read from sensor means. keep the same code there is no change in the uploaded code.

you create one function. in that you read the raw data. process it and store in one variable. then do sprintf to convert into string . then push the data using ble_nus_data_send().

and in main function()

after init functions

in while loop you call the function with time interval of 1S delay

it will push the respective data. in your mobile using BLE UART app you can see the string

static void read_sensor_data()
{
      m_xfer_done = false;
      uint16_t length;
      
      float f = 23.50;
      char str[80];
      
      length1 = sprintf(str, "AccX = %5d  AccY = %5d  AccZ = %5d \n", accel.x, accel.y, accel.z);

      rsltb = ble_nus_data_send(&m_nus, str, &length1, m_conn_handle);
      NRF_LOG_INFO("Data send...");
        NRF_LOG_FLUSH();
       printf("AccX = %5d  AccY = %5d  AccZ = %5d \r\n", accel.x, accel.y, accel.z);
        printf("Data send.. \r\n");

}

/**@brief Application main function.
 */
int main(void)
{
    bool erase_bonds;
     uint8_t sample_data[10];

    // Initialize.
    uart_init();
    log_init();
    timers_init();
    buttons_leds_init(&erase_bonds);
    power_management_init();
    ble_stack_init();
    gap_params_init();
    gatt_init();
    services_init();
    advertising_init();
    conn_params_init();

    // Start execution.
    printf("\r\nUART started.\r\n");
    NRF_LOG_INFO("BMI160 get started...");
    advertising_start();
    Acc_delay_ms(100);

    twi_init();
    Acc_delay_ms(50);

    BMI160_init();
     NRF_LOG_FLUSH();
    Acc_delay_ms(100);

    // Enter main loop.
    for (;;)
    {
        //idle_state_handle();
        nrf_delay_ms( 1000 ) ;
        read_sensor_data();
    }
}