https://devzone.nordicsemi.com/f/nordic-q-a/40796/frequent-connection-and-disconnection-every-30-seconds-on-android-8-0-and-aboveHello everyone, We are building a wearable that uses nrf51822 chip. We are facing a specific issue of connection and disconnection every 30 seconds with Android devices running OS 8.0 and above. We are not facing similar issue with the Android devicesen-USTelligent Community 13Thu, 22 Nov 2018 12:15:54 GMThttps://devzone.nordicsemi.com/thread/158617?ContentTypeID=1Thu, 22 Nov 2018 12:15:54 GMT137ad170-7792-4731-bb38-c0d22fbe4515:5aedc676-f61c-492e-b716-3e540149f832MartinBL<p>Hi,</p> <p>30 seconds is a typical connection timeout interval. So if it is exactly 30 seconds every time it indicates that&nbsp;something breaks the link, the phone waits for packets from your <span>nrf51822&nbsp;</span>for 30 seconds, and then disconnects.&nbsp;</p> <p>I can&#39;t tell you what is wrong without more details though.&nbsp;</p> <ol> <li>Do you get any error logs out of the&nbsp;<span>nrf51822&nbsp;or the phone?</span></li> <li><span>Have you debugged your&nbsp;application?</span></li> <li><span>Can you provide a sniffer trace? If you have a Nordic kit to spare you can use our&nbsp;<a title="nRF Tools" href="http://infocenter.nordicsemi.com/topic/com.nordic.infocenter.tools/dita/tools/sniffer/sniffer_intro.html?resultof=%22%73%6e%69%66%66%65%72%22%20">nRF Bluetooth Sniffer</a> solution.&nbsp;</span></li> </ol><div style="clear:both;"></div>