Restart advertisement timeout before its actual timeout (Restart whenever there is a button press)

RE: Restart advertisement timeout before its actual timeout (Restart whenever there is a button press)

beemavishnu — Wed, 12 Jun 2019 13:21:37 GMT

Thank you for your inputs

RE: Restart advertisement timeout before its actual timeout (Restart whenever there is a button press)

awneil — Wed, 12 Jun 2019 12:47:44 GMT

[quote userid="78085" url="~/f/nordic-q-a/48461/restart-advertisement-timeout-before-its-actual-timeout-restart-whenever-there-is-a-button-press/192371"]Can I blindly call stop advertisement functionality even though advertisement did not started at all[/quote]

Yes.

If your device is not advertising when you call sd_ble_gap_adv_stop, it will return NRF_ERROR_INVALID_STATE - but that is harmless. So you just need to handle that case as an "OK" result.

Note that if you use the 'Go To Declaration' feature of your IDE there will be comments there which describe the possible return codes, and what causes them.

RE: Restart advertisement timeout before its actual timeout (Restart whenever there is a button press)

beemavishnu — Wed, 12 Jun 2019 12:39:55 GMT

Hi Einar,

Can I blindly call stop advertisement functionality even though advertisement did not started at all. Below is the code I tested and its seems working. Can you please cross check and let me know your inputs.

void start_Advertisement(void)
{
    advertising_stop();
    advertising_start();
}


void advertising_start(void)
{
    ret_code_t err_code = sd_ble_gap_adv_start(m_adv_handle, APP_BLE_CONN_CFG_TAG);
    
    APP_ERROR_CHECK(err_code);
}

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

Thanks & Regards

Vishnu Beema

RE: Restart advertisement timeout before its actual timeout (Restart whenever there is a button press)

Einar Thorsrud — Wed, 12 Jun 2019 12:17:40 GMT

Hi,

You will always get NRF_ERROR_INVALID_STATE returned if you try to start advertising when it is already active. A better way to do this is probably to stop and then re-start advertising.