https://devzone.nordicsemi.com/f/nordic-q-a/9958/ios-do-not-connect-actively-after-peering-with-irkHi, All sdk v7.2, IOS 9.1 I know after peering with IRK, iOS will connect 51822 actively. There&#39;re some issue in my project. It&#39;s not certain happen. At most of time, iOS can connect device automatically after disconnection. But some time,en-USTelligent Community 13Mon, 02 Nov 2015 11:26:45 GMThttps://devzone.nordicsemi.com/thread/36949?ContentTypeID=1Mon, 02 Nov 2015 11:26:45 GMT137ad170-7792-4731-bb38-c0d22fbe4515:39170ad0-85e8-4c13-a6ff-bed3b729d551Petter Myhre<p>The advertising packets are equal in Abnormal and DisconnectManually&amp;ReconnectAuto so that shouldn&#39;t be the problem. How are you autoconnecting? Like described <a href="https://devzone.nordicsemi.com/question/51099/i-want-my-app-to-auto-connect-to-my-nrf51822-device/">here</a>? What kind of iOS device(s) are you testing with? I found <a href="http://stackoverflow.com/questions/26193166/corebluetooth-connect-to-peripheral-in-background-on-iphone-6">this</a>, I&#39;m not sure it is related though.</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/36948?ContentTypeID=1Wed, 28 Oct 2015 11:55:13 GMT137ad170-7792-4731-bb38-c0d22fbe4515:c6276f00-e9e9-4495-9515-69797505fb1ePetter Myhre<p>What kind of application are you running? Since you are not getting the BLE_GAP_EVT_CONNECTED event, it seems iOS just doesn&#39;t connect. I don&#39;t think the problem is on the peripheral side (nRF51). Do you have a sniffer trace?</p><div style="clear:both;"></div>