Want to send static data in Serial Program

[hkarthik97]

I want to send static data from nrf52 to esp8266. I have used serial Program from examples. I am able to send data dynamically from the serial monitor.

[awneil]

hkarthik97 said:

I want to send static data from nrf52 to esp8266.

I don't understand what you mean by that!

What have you tried?

Where are you stuck?

[hkarthik97]

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#include <stdint.h>
#include <stdbool.h>
#include <stddef.h>

#include "nrf.h"
#include "nrf_drv_clock.h"
#include "nrf_gpio.h"
#include "nrf_delay.h"
#include "nrf_log.h"
#include "nrf_log_ctrl.h"
#include "nrf_drv_power.h"
#include "nrf_serial.h"
#include "app_timer.h"


#include "app_error.h"
#include "app_util.h"
#include "boards.h"

/** @file
 * @defgroup nrf_serial_example main.c
 * @{
 * @ingroup nrf_serial_example
 * @brief Example of @ref nrf_serial usage. Simple loopback.
 *
 */

#define OP_QUEUES_SIZE          3
#define APP_TIMER_PRESCALER     NRF_SERIAL_APP_TIMER_PRESCALER

static void sleep_handler(void)
{
    __WFE();
    __SEV();
    __WFE();
}

NRF_SERIAL_DRV_UART_CONFIG_DEF(m_uart0_drv_config,
                      RX_PIN_NUMBER, TX_PIN_NUMBER,
                      RTS_PIN_NUMBER, CTS_PIN_NUMBER,
                      NRF_UART_HWFC_ENABLED, NRF_UART_PARITY_EXCLUDED,
                      NRF_UART_BAUDRATE_115200,
                      UART_DEFAULT_CONFIG_IRQ_PRIORITY);

#define SERIAL_FIFO_TX_SIZE 32
#define SERIAL_FIFO_RX_SIZE 32

NRF_SERIAL_QUEUES_DEF(serial_queues, SERIAL_FIFO_TX_SIZE, SERIAL_FIFO_RX_SIZE);


#define SERIAL_BUFF_TX_SIZE 1
#define SERIAL_BUFF_RX_SIZE 1

NRF_SERIAL_BUFFERS_DEF(serial_buffs, SERIAL_BUFF_TX_SIZE, SERIAL_BUFF_RX_SIZE);

NRF_SERIAL_CONFIG_DEF(serial_config, NRF_SERIAL_MODE_IRQ,
                      &serial_queues, &serial_buffs, NULL, sleep_handler);


NRF_SERIAL_UART_DEF(serial_uart, 0);

int main(void)
{
    ret_code_t ret;

    ret = nrf_drv_clock_init();
    APP_ERROR_CHECK(ret);
    ret = nrf_drv_power_init(NULL);
    APP_ERROR_CHECK(ret);

    nrf_drv_clock_lfclk_request(NULL);
    ret = app_timer_init();
    APP_ERROR_CHECK(ret);

    // Initialize LEDs and buttons.
    bsp_board_init(BSP_INIT_LEDS | BSP_INIT_BUTTONS);

    ret = nrf_serial_init(&serial_uart, &m_uart0_drv_config, &serial_config);
    APP_ERROR_CHECK(ret);

    static char tx_message[] = "Hello nrf_serial!\n\r";

    ret = nrf_serial_write(&serial_uart,
                           tx_message,
                           strlen(tx_message),
                           NULL,
                           NRF_SERIAL_MAX_TIMEOUT);
    APP_ERROR_CHECK(ret);

    while (true)
    {
        char c,d;
        ret = nrf_serial_read(&serial_uart, &c, sizeof(c), NULL, 1000);
        if (ret != NRF_SUCCESS)
        {
            continue;
        }
        (void)nrf_serial_write(&serial_uart, &c, sizeof(c), NULL, 0);
        (void)nrf_serial_flush(&serial_uart, 0);

    }
}

/** @} */

This is my code i am able to send the data from nrf52 dk to esp8266 through the serial monitor 

In the above image I sent a string from nrf52 to esp8266 through the serial monitor .

I want to declare a static string and keep on sending it to esp8266.

Eg: 

I am connecting a temperature sensor to nrf52 dk and I am sending the temperature data to esp8266 so that i can store it in cloud . 

[awneil]

Still confused!

Your code shows that you do have a static string:

    static char tx_message[] = "Hello nrf_serial!\n\r";

and your terminal screenshot seems to show that you can send it!

So I'm still unclear what the actual problem is!

BTW

Note that it is usual to have the Carriage Return (CR) first - ie, "\r\n" - giving CRLF

[hkarthik97]

This is the process that i want to do .

I got the sensor data i want to send this data to ESP8266 how should i do that 

[awneil]

So it's not static data, then - is it?

But you have the code right here:

    ret = nrf_serial_write( &serial_uart,
                            tx_message,
                            strlen(tx_message),
                            NULL,
                            NRF_SERIAL_MAX_TIMEOUT) ;
    APP_ERROR_CHECK(ret);

The nrf_serial_write() function just sends data - it neither knows nor cares where that data comes from, nor whether it is "static" or not.

You just give it a pointer to (the start of) the data you want to send, and tell it the length of that data.

Simples!

[hkarthik97]

    static char tx_message[] = "Hello nrf_serial!\n\r";
    static char k[] = "jio";

    ret = nrf_serial_write(&serial_uart,
                           k,
                           strlen(k),
                           NULL,
                           NRF_SERIAL_MAX_TIMEOUT);
    APP_ERROR_CHECK(ret);

No this part is not working I tried 

[awneil]

So what debugging have you done to find why it works with 'tx_message', but not with 'k' ?

Are you sure that your terminal doesn't depend on there being  a CR and/or LF on the end?