problem on receiving data with ble_app_multilink_central

[dhia1994]

Hi!  I want to send data from nrf51 to another nrf51 multilink_central! I don't have any problem about sending data! It's work with a perfect way! But my problem is how to receive data with multilink_central! the connection is established between sender and the receiver ( multilink_central).

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,
#if defined (UART_PRESENT)
        .baud_rate    = NRF_UART_BAUDRATE_115200
#else
        .baud_rate    = NRF_UARTE_BAUDRATE_115200		
#endif
    };
		    APP_UART_FIFO_INIT(&comm_params,
                       UART_RX_BUF_SIZE,
                       UART_TX_BUF_SIZE,
                       (app_uart_event_handler_t)uart_evt_handle,
                       APP_IRQ_PRIORITY_LOWEST,
                       err_code);
    APP_ERROR_CHECK(err_code);

}

but i have a part of my code how make this kind of error (fatal)

and this is the part that make this problem  !

Please help me because this method doesn't work

[Stian Røed Hafskjold]

Hi, can you add the DEBUG flag to your project? Then the log will print the actual error code instead of just "fatal"

[dhia1994]

the problem is about " APP_ERROR_CHECK (err_code) " and i don't know why ?

[dhia1994]

yes i use Keil

[Stian Røed Hafskjold]

Ok. Go to Project -> Options for target ... -> C/C++. In the "Define:" textbox under Preprocessor Symbols add the flag DEBUG to the list. Compile and flash. Now you should get some more debug info, instead of just "fatal"

[dhia1994]

sir ! i don't understand what do you mean exactly ! how can i add  the flag DEBUG to the list ? 

[Stian Røed Hafskjold]

Just write DEBUG into the text area. I didn't realize that you were using an old SDK, so the logging will still only show "fatal", but when you start the debugging session, the debugger will stop in the error handler and you can see the error code. I'm suspecting that you are getting error 9 which is NRF_ERROR_INVALID_LENGTH: https://infocenter.nordicsemi.com/topic/com.nordic.infocenter.sdk5.v12.3.0/group__app__uart.html?cp=5_4_7_6_8_37_13#gae0ede683cca785a3706d8c3e465a1eb9

[dhia1994]

Function is implemented as weak so that it can be overwritten by custom application error handler when needed..

i don't know why ?