How to change advertising interval run time with SDK 15.2.0

[pd@learner]

Hi, I am using nrf52832 with SDK 15.2.0 and nrf 52 dev board. I  want change advertising interval in run time so I call a function with the interval as the parameter change_adv_interval (interval ) every time that I will change.

Thanks in Advance.

[Simonr]

Hi Prashant

You need to stop and start the advertising when you do your updates. It should be possible with something similar to this:

sd_ble_gap_adv_stop();

ble_gap_adv_params_t adv_params;
memset(&adv_params, 0, sizeof(adv_params));
adv_params.interval = interval;
adv_params.timeout = 0;

err_code = sd_ble_gap_adv_start(&adv_params);
APP_ERROR_CHECK(err_code);

Best regards,

Simon

[DinoDino]

Hi Simon,

I am using SDK16 and NRF52 DK. My goal is to update advertising interval in non-connectable mode dynamically. I don't use advertising module and I am following code from pwr_profiling example to setup advertisement parameters.

In order to update the advertising interval, I wrote a function which stops advertising and then updates the interval and calls the function sd_ble_gap_adv_set_configure. I have thought of another approach too and it's commented down there.

However, the function sd_ble_gap_adv_stop fails without any return code. I tried to set a breakpoint and debug, but in vain. Let me know if it is necessary to stop advertisement for this use-case in SDK16 and how to update update advertising interval dynamically. And as well as a technique to debug and find error code.

void non_conn_adv_interval_update(int8_t m_adv_interval)
{
      ret_code_t      err_code;
      err_code = sd_ble_gap_adv_stop(m_adv_handle);
      APP_ERROR_CHECK(err_code);

      // Approach 1 : 
      NRF_LOG_INFO("Adv interval : %d", m_adv_interval);
      m_adv_params.interval        = m_adv_interval;
      err_code = sd_ble_gap_adv_set_configure(&m_adv_handle, &m_adv_data, &m_adv_params);
      APP_ERROR_CHECK(err_code);

      // Approach 2:
      //non_connectable_adv_init(m_adv_interval);
      //advertising_start(true);

}

Regards,

Dino