https://devzone.nordicsemi.com/f/nordic-q-a/18361/ble-sheild-v2-1-arduino-disconnects-ble-connection-after-30-minutesI have connected (BLE shield + Arduino Mega) with uploaded some Excercises code, It&#39;s working for 30 minutes with paired android device and disconnecting automatically. Could you help me why its disconnecting and what would be the fix? sorry ifen-USTelligent Community 13Tue, 13 Dec 2016 11:58:34 GMThttps://devzone.nordicsemi.com/thread/70894?ContentTypeID=1Tue, 13 Dec 2016 11:58:34 GMT137ad170-7792-4731-bb38-c0d22fbe4515:39d639a4-01f9-4b65-a265-aac32d060824FormerMember<p>A sniffer trace of the connection would be very useful. Do you have a nRF51-DK or a nRF51-Dongle? If so, could you use <a href="https://www.nordicsemi.com/eng/nordic/download_resource/26386/14/65517724">the sniffer</a> to track what is being transferred over the air? And upload the sniffer trace here?</p> <p>The sniffer should be used with Wireshark, and it works best with version 1.10, not one of the newer versions. Wireshark can be downloaded here:</p> <ul> <li><a href="https://www.wireshark.org/download/win32/all-versions/">www.wireshark.org/.../</a></li> <li><a href="https://www.wireshark.org/download/win64/">www.wireshark.org/.../</a></li> </ul> <p>You could also run the chip in debug mode and check if a disconnected event occur, or if your device for some reason disconnects the link.</p><div style="clear:both;"></div>