https://devzone.nordicsemi.com/f/nordic-q-a/60901/cant-re-start-advertising-after-disconnectHello, in my application (adapted from ble_app_uart peripheral example of SDK 16.0) I am starting advertising using err_code = ble_advertising_start(&amp;m_advertising, BLE_ADV_MODE_FAST); and then letting it connect and disconnect, and then afteren-USTelligent Community 13Tue, 05 May 2020 19:01:11 GMThttps://devzone.nordicsemi.com/thread/248299?ContentTypeID=1Tue, 05 May 2020 19:01:11 GMT137ad170-7792-4731-bb38-c0d22fbe4515:67979676-3bd7-4e8e-81ad-08eb6f8a6fb7riceman0<p>got it, thanks!</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/247974?ContentTypeID=1Mon, 04 May 2020 15:33:06 GMT137ad170-7792-4731-bb38-c0d22fbe4515:3ed0555c-85cb-4e43-9250-310c6b0130d7Sigurd<p>The advertising module will by default re-start the advertising for you in ble_advertising.c function on_disconnected(). If you then try start it yourself with&nbsp;sd_ble_gap_adv_start(), the function&nbsp;sd_ble_gap_adv_start() will return&nbsp;<span>NRF_ERROR_INVALID_STATE because advertising is already on-going!</span></p><div style="clear:both;"></div>