https://devzone.nordicsemi.com/f/nordic-q-a/8475/proper-way-to-wait-for-eventsI&#39;m trying to establish a bond in my project and then perform service discovery, however the discovery is returning the BUSY error. I tried to wait for the events according to the documentation but they will never trigger so long as I have the whileen-USTelligent Community 13Mon, 03 Aug 2015 06:37:26 GMThttps://devzone.nordicsemi.com/thread/30911?ContentTypeID=1Mon, 03 Aug 2015 06:37:26 GMT137ad170-7792-4731-bb38-c0d22fbe4515:c65df73e-bfaf-4d55-a204-b3c731557c92Susheel Nuguru<p>dm_security_setup_req calls sd_ble_gap_encrypt This is what I read from the header file ble_gap.h-&gt;sd_ble_gap_encrypt</p> <ul> <li>@retval ::NRF_ERROR_BUSY Procedure already in progress or not allowed at this time, wait for pending procedures to complete and retry.</li> </ul> <p>It says that just waiting is not enough, you need to retry again</p> <p>You can start a timer instead of WHILE and check for the bondPending flag in the timer callback and call dm_security_setup_req again. That should be safe way to do this. There are few examples in SDK that do it this way (ble_app_ancs_c for example), how much time you app can wait is app specific, I recommend you to wait few connection intervals until the possibility of security setup failure is excluded.</p><div style="clear:both;"></div>