How do I start and stop Bluetooth Scanning?

[schosdas]

Hello, everyone!

I am using nRF52DK and SDK v17, and I am dealing with the example of ble_app_uart.

Using this example, I am testing how buttons control BLE scanning. As I was conducting the test, I realized that I could start a scan using the code below.

static void advertising_start(bool erase_bonds)
{
    if (erase_bonds == true)
    {
        delete_bonds();
        // Advertising is started by PM_EVT_PEERS_DELETE_SUCCEEDED event.
    }
    else
    {
        ret_code_t err_code;

        err_code = ble_advertising_start(&m_advertising, BLE_ADV_MODE_FAST);
        APP_ERROR_CHECK(err_code);
    }
}

I knew how to start a scan like this, but I couldn't find a way to stop the scan.

As shown in the code below, the example ble_app_blinky saw that I could easily start and stop a scan using a different function.
I think this method is different from the example of the ble_app_uart, is it okay to use the same code? or is there another way?

static void advertising_start(void) //bluetooth scanning start
{
    ret_code_t           err_code;

    err_code = sd_ble_gap_adv_start(m_adv_handle, APP_BLE_CONN_CFG_TAG); 
    APP_ERROR_CHECK(err_code);

    bsp_board_led_on(ADVERTISING_LED); //led1
}


static void advertising_stop()
{
    ret_code_t           err_code;
    err_code = sd_ble_gap_adv_stop(m_adv_handle);
    APP_ERROR_CHECK(err_code);

    bsp_board_led_off(ADVERTISING_LED); //led1
}

Thank you for reading through!

[run_ar]

Hi,

Advertising is stopped using the sd_ble_gap_adv_stop function. However ble_app_uart uses the ble_advertising module, while it seems that blinky does not. You should still be able to use the function advertising_stop but you need to provide the correct advertisement handle. Should be in m_advertising.

[schosdas]

Thank you for your answer.

I used the code below to stop adverting.

sd_ble_gap_adv_stop(m_advertising.adv_handle);

I can use this code to stop the advertising, but the board will stop afterwards.

Did I use it correctly?

Thank you.

[run_ar]

Not sure understand what you mean when you say the board will stop afterwards? Do you have a means to restart advertising?

[schosdas]

Oh, I tried it again and it worked well.
Maybe I made a mistake.

I can use the 3,4 buttons to start/stop advertising.
Thank you for your help