https://devzone.nordicsemi.com/f/nordic-q-a/2634/uart-demo-disconnectHi We are using the UART demo to communicate with the nrfUART app.There&#39;s a condition some time when it connect,it will disconnect immediately,anybody know what&#39;s the issues from? Thanksen-USTelligent Community 13Fri, 30 May 2014 10:26:35 GMThttps://devzone.nordicsemi.com/thread/10383?ContentTypeID=1Fri, 30 May 2014 10:26:35 GMT137ad170-7792-4731-bb38-c0d22fbe4515:53e81b57-5568-47b4-a5ce-dc6a13c0eab6Stefan Birnir Sverrisson<p>Hi</p> <p>I do not have a clear answer as this is working fine on my Samsung S4 phone. A colleague of mine experienced similar things a while ago when he had been connecting to a device with another profile before running the UART demo. Perhaps Android did not update its BLE attribute table for the UART demo profile but was still using attribute table from the old profile. You could try to disable BLE on your Android phone and enable it again to see if that fixes the problem (Settings -&gt; Connections -&gt; Bluetooth), or perhaps restart the Android phone.</p> <p>Do you see any disconnect reason or code?</p> <p>The best way to analyze the problem is to see what is happening on air. Currently we provide <a href="https://www.nordicsemi.com/eng/Products/Bluetooth-R-low-energy/nRF-Sniffer/(language)/eng-GB">BLE packet Sniffer</a> for this purpose.</p><div style="clear:both;"></div>