https://devzone.nordicsemi.com/f/nordic-q-a/57655/nrf_error_busy-from-sd_ble_gattc_primary_services_discover-after-iphone-restartWe are using nRF52832 to develop our product with the ANCS function. But after bonding with the iPhone and then restart the iPhone, an error message &quot;NRF_ERROR_BUSY&quot; will receive. The cause seems come from &quot;sd_ble_gattc_primary_services_discover&quot;en-USTelligent Community 13Wed, 12 Feb 2020 02:30:59 GMThttps://devzone.nordicsemi.com/thread/233855?ContentTypeID=1Wed, 12 Feb 2020 02:30:59 GMT137ad170-7792-4731-bb38-c0d22fbe4515:e77b15c6-e462-464f-a54a-d0b7ff6d8737Cyrus Cheung<p>Thx! It works!</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/233634?ContentTypeID=1Tue, 11 Feb 2020 07:29:34 GMT137ad170-7792-4731-bb38-c0d22fbe4515:f3386c11-36f0-46ff-9ebe-ab3c2cb1e240Harry Wei<p>First, create a app_timer(<span style="color:#e06c75;">APP_TIMER_MODE_SINGLE_SHOT about 2-3s timeout</span>)</p> <p>then when check the&nbsp; <span style="font-size:150%;">NRF_ERROR_BUSY</span>&nbsp; , start-up the app_timer created, call <span style="font-size:150%;">sd_ble_gattc_primary_services_discover</span> again in the callback function of ther app-timer</p><div style="clear:both;"></div>