https://devzone.nordicsemi.com/f/nordic-q-a/27617/min-max-connect-intervali use BLE uart project SDK 11 NRF 51822 with 2 value min max conn interval default is 20 and 75 ms. i use android App was built by my team, and it&#39; hard connect to NRF. sometime miss, sometime Ok. but when i change min,max interval to 100 and 200en-USTelligent Community 13Tue, 28 Nov 2017 09:26:59 GMThttps://devzone.nordicsemi.com/thread/109073?ContentTypeID=1Tue, 28 Nov 2017 09:26:59 GMT137ad170-7792-4731-bb38-c0d22fbe4515:ba74f348-fd3d-465a-961f-646ffd85c939ketil<p>Hi,</p> <p>We will need some more information in order to answer your question. Could you capture a log of the activity and paste it here?</p> <p>The easiest way to capture a log is to use <a href="https://play.google.com/store/apps/details?id=no.nordicsemi.android.mcp&amp;hl=en">nRF Connect</a>. Optionally, you can also install <a href="https://play.google.com/store/apps/details?id=no.nordicsemi.android.log&amp;hl=en">nRF Logger</a> if you want to save your logs for later access.</p> <p>Ketil</p><div style="clear:both;"></div>