https://devzone.nordicsemi.com/f/nordic-q-a/22382/hang-on-ble-connect---custom-service-sdk13-migrationI&#39;m migrating from SDK11 to SDK13. My custom service is based off Heart Rate Service, so I started from the new SDK13 example of HRS, and updated all the initialization code following the new example. Changed: ble_cg.common_cg.vs_uuid__cfg.vs_uuid_counten-USTelligent Community 13Thu, 29 Jun 2017 20:17:21 GMThttps://devzone.nordicsemi.com/thread/88007?ContentTypeID=1Thu, 29 Jun 2017 20:17:21 GMT137ad170-7792-4731-bb38-c0d22fbe4515:1c0be02f-f6d9-4143-8211-fabcb484da31kmorris<p>So I ended up just starting from the new SDK13 version of HRS and modifying to fit my custom service and that part is working now. I now have a new issue, related, but not the same, so I&#39;ll open a new question. Thanks.</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/88008?ContentTypeID=1Wed, 31 May 2017 11:40:51 GMT137ad170-7792-4731-bb38-c0d22fbe4515:11c6e16c-21a4-4208-893c-19c6a736473dFormerMember<p>I guess this will not change anything, but could you move ble_cgm_on_ble_evt() out of cgm_on_ble_evt() and call ble_cgm_on_ble_evt() directly from ble_evt_dispatch() instead, and check if it changes anything?</p> <p>If you run the chip in debug mode, and stop the process when the chip is hanging, where does the chip stop?</p> <p>What happens if you set a breakpoint in the on_connect() function when ble_cgm_on_ble_evt() is placed inside cgm_on_ble_evt()?</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/88009?ContentTypeID=1Tue, 30 May 2017 15:06:22 GMT137ad170-7792-4731-bb38-c0d22fbe4515:88f336ca-3f96-461d-a935-29c42c18373fkmorris<p>Thanks Kristin, that&#39;s what I figured about the connection handle. I updated the question with some more code.</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/88006?ContentTypeID=1Mon, 29 May 2017 07:40:49 GMT137ad170-7792-4731-bb38-c0d22fbe4515:2cff091b-1eeb-4b33-828e-a08c5b7d4a89FormerMember<p>The first connection will have connection handle &#39;0&#39;. And, it should not be a problem assigning a connection handle to &#39;0&#39;, a connection handle is just a reference for the application to the various connections.</p> <p>What does the code calling <code>on_connect()</code> look like?</p> <p>When calling <code>on_connect()</code>, how is the input parameter p_cgm defined?</p> <p>What does the struct <code>ble_cgm_t</code> look like?</p><div style="clear:both;"></div>