https://devzone.nordicsemi.com/f/nordic-q-a/16864/my-ble-connection-lost-during-run-timeI mounted the chip onto my own PCB, I am not using a devkit, My board is &quot;Wireless-Tag WT51822-S2&quot;, it is a module that uses nRF51822-QFAA as (SoC) I am the ble_app_uart example inside sdkv10.0.0 as a framework to my application. My applicationen-USTelligent Community 13Wed, 05 Oct 2016 13:36:56 GMThttps://devzone.nordicsemi.com/thread/64578?ContentTypeID=1Wed, 05 Oct 2016 13:36:56 GMT137ad170-7792-4731-bb38-c0d22fbe4515:696bb1c4-ab30-4cf4-be1c-ce4a7d56aedcKhazragy<p>Thank you Petter for your reply. I will try to get the event but anyway when I go home. But anyway software goes to HardFault handler then the connection stopped</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/64577?ContentTypeID=1Wed, 05 Oct 2016 09:48:16 GMT137ad170-7792-4731-bb38-c0d22fbe4515:bb5e943f-e2e0-41e0-a35f-27f66fbfe7a1Petter Myhre<p>First you need to figure out why you get connection loss. Are any of the devices disconnecting? This is simplest seen on a sniffer trace. You can use nRF Sniffer. If none are disconnecting, one of the devices stops maintaining the connection, which causes the peer to disconnect. This can also be seen on a sniffer trace. If you don&#39;t have sniffer I recommend checking if you get a BLE_GAP_EVT_DISCONNECTED event or if your device resets (see <a href="https://devzone.nordicsemi.com/question/97579/my-ble-connection-lost-during-run-time/">this</a>).</p><div style="clear:both;"></div>