https://devzone.nordicsemi.com/f/nordic-q-a/35266/how-to-reset-the-advertising-counter-for-specific-modeHi, We are working with SDK 15 with the HRS freeRTOS example. we did some modification to the advertising modes so that we advertise on fast mode for 1 minute and after that we go to slow advertising with BLE_GAP_ADV_TIMEOUT_GENERAL_UNLIMITED. Asen-USTelligent Community 13Mon, 11 Jun 2018 09:01:38 GMThttps://devzone.nordicsemi.com/thread/135515?ContentTypeID=1Mon, 11 Jun 2018 09:01:38 GMT137ad170-7792-4731-bb38-c0d22fbe4515:08d095c9-1e84-40f3-b39d-a65c3ad02707Vidar Berg<p>Hi,</p> <p>ble_advertising_start() returns invalid state if the device is already advertising.&nbsp;Calling&nbsp;sd_ble_gap_adv_stop(uint8_t adv_handle); just before calling ble_advertising_start() should fix this.&nbsp;</p> <p>&nbsp;</p><div style="clear:both;"></div>