https://devzone.nordicsemi.com/f/nordic-q-a/43679/how-to-connect-to-the-specific-app-during-bluetooth-connectionHi I am using the nrf51422_XXAC device. I want to make a connection with my app alone. other apps should not be able to connect. please help me with sample code. I am new to the device what I need is that only after opening the app I should connecten-USTelligent Community 13Mon, 25 Feb 2019 15:59:52 GMThttps://devzone.nordicsemi.com/thread/172845?ContentTypeID=1Mon, 25 Feb 2019 15:59:52 GMT137ad170-7792-4731-bb38-c0d22fbe4515:4d006c48-d6e1-4cd8-a843-04c5a0df5890Kenneth<p>&quot;<span>nrf51422 crashes&nbsp;</span>&quot; is a very vague description, I assume that if you enable debugging you can identify file name, line number, and error code.</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/171287?ContentTypeID=1Fri, 15 Feb 2019 07:50:43 GMT137ad170-7792-4731-bb38-c0d22fbe4515:94bf7900-798f-4862-8c83-a6f4a139c115AGSDINESH<p>I have used the&nbsp;<span>BLE_GAP_CONN_SEC_MODE_SET_ENC_WITH_MITM for cccd.write. it connects with passkey. but while trying to reconnect the nrf51422 crashes&nbsp;</span></p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/171109?ContentTypeID=1Thu, 14 Feb 2019 11:58:36 GMT137ad170-7792-4731-bb38-c0d22fbe4515:0e89b4b4-69d6-4a09-b20b-c733a6f6e6faKenneth<p>Not sure where the problem is, but maybe you can find the following example useful, it is from an old SDK, but in principle it should be the same:&nbsp;<a href="https://github.com/NordicPlayground/nRF51-ble-app-uart-static-passkey/blob/master/main.c">https://github.com/NordicPlayground/nRF51-ble-app-uart-static-passkey/blob/master/main.c</a>&nbsp;</p><div style="clear:both;"></div>