I want to send data from nrf51822 through UART TX to esp8266.

RE: I want to send data from nrf51822 through UART TX to esp8266.

awneil — Mon, 06 May 2019 15:58:46 GMT

Yes, that would do it!

Now please verify the answer:

RE: I want to send data from nrf51822 through UART TX to esp8266.

ej_junior — Mon, 06 May 2019 15:47:28 GMT

I managed to get it working by changing APP_UART_FLOW_CONTROL_ENABLE to

APP_UART_FLOW_CONTROL_DISABLED

static void uart_init(void)
{
    uint32_t                     err_code;
    const app_uart_comm_params_t comm_params =
    {
        RX_PIN_NUMBER,
        TX_PIN_NUMBER,
        RTS_PIN_NUMBER,
        CTS_PIN_NUMBER,
        APP_UART_FLOW_CONTROL_DISABLED,
        false,
        UART_BAUDRATE_BAUDRATE_Baud9600
    };

    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);
}

RE: I want to send data from nrf51822 through UART TX to esp8266.

ej_junior — Mon, 06 May 2019 13:54:09 GMT

Thanks for your reply. I've tried with a pc terminal.

I've even tested the sending data to the esp8266 from a different device and it works. But when i try with the nrf51822, I do not receive any data at all.

Please see my code above

RE: I want to send data from nrf51822 through UART TX to esp8266.

ej_junior — Mon, 06 May 2019 13:43:55 GMT

This is my code so far.
I changed the TX pin from 9 to 26. Since not working on 9, but still not receiving any values on esp8266 arduino serial port

// NRF_LOG_BACKEND_SERIAL_UART_TX_PIN 26 
// NRF_LOG_BACKEND_SERIAL_UART_RX_PIN 11


// Sending data through TX
static void uart_loopback_test()
{
 
uint32_t err_code;
    // Start sending one byte and see if you get the same
    for (uint32_t i = 0; i < length; i++)
    { 
			 while (app_uart_put(data[i]) != NRF_SUCCESS);
    }
		 nrf_delay_ms(10); 

    return;
}


// UART init
static void uart_init(void)
{
    uint32_t                     err_code;
    const app_uart_comm_params_t comm_params =
    {
        RX_PIN_NUMBER,
        TX_PIN_NUMBER,
        RTS_PIN_NUMBER,
        CTS_PIN_NUMBER,
        APP_UART_FLOW_CONTROL_ENABLED,
        false,
        UART_BAUDRATE_BAUDRATE_Baud9600
    };

    APP_UART_FIFO_INIT( &comm_params,
                       UART_RX_BUF_SIZE,
                       UART_TX_BUF_SIZE,
                       uart_event_handle,
                     //  APP_IRQ_PRIORITY_LOWEST,
						APP_IRQ_PRIORITY_HIGHEST,
                       err_code);
    APP_ERROR_CHECK(err_code);
}

RE: I want to send data from nrf51822 through UART TX to esp8266.

awneil — Mon, 06 May 2019 11:35:03 GMT

[quote userid="76949" url="~/f/nordic-q-a/46956/i-want-to-send-data-from-nrf51822-through-uart-tx-to-esp8266"]having difficulty sending data through TX[/quote]

What "difficulty", exactly?

What hardware are you using?

Can you successfully communicate (Tx & Rx) with a PC terminal? You should get this working before adding complications like an esp8266!

On debugging serial comms in general: www.avrfreaks.net/.../2336161

RE: I want to send data from nrf51822 through UART TX to esp8266.

Jared — Mon, 06 May 2019 11:24:35 GMT

Hi,

Do you measure any signal on the TX pin?

best regards

Jared