How to create something akin to a thread in nRF SDK

[purvisb]

I'm running OpenThread on a nrf52840-mdk from maker diary. I'm using the nRF SDK for thread and zigbee.

I would like to poll a sensor periodically. OpenThread does not offer this kind of service. Is there anything i can use in the SDK to accomplish this? I tried using an RTOS but i've been struggling to implement that.

[Jørgen Holmefjord]

Hi,

Do you need threads for this? It sounds like you can achieve this easily by using a timer that generates a regular interrupt where you can read the sensor.

Check out the Application Timer tutorial.

Best regards,
Jørgen

[purvisb]

When I implement the code from that tutorial in my application - OpenThread doesn't start at all. The timer does seem to start for a few seconds, then stops. Here's my main function:

int main(int argc, char *argv[])
{
    nrf_gpio_init();
    nrf_gpiote_init();
    nrf_bsp_init();
    leds_init();
    lfclk_request();
    app_timer_init();
    create_timers();
    thread_instance_init();
    otIp6SetEnabled(thread_ot_instance_get(), true);
    thread_customCommands_init();
    thread_CoAP_init();
    thread_joiner_init();
    //starting thread happens in joiner_evt_handler function
    start_timers();

    while (true)
    {
        while (!thread_soft_reset_was_requested())
        {
            thread_process();
        }
        thread_instance_finalize();
    }
}

When I comment out start_timers() and create_timers(), the device seems to reboot every second. I think it restarts after thread is started in the joiner handler.

[purvisb]

Never mind, I didn't follow the doc all the way to configure sdk_config.h.

Thank you!