https://devzone.nordicsemi.com/f/nordic-q-a/65229/rssi-filter-during-scanHi, I&#39;m using nRF52840 DK as a central. Our project is based on ble_app_uart_c example. There is filter for UUID only during scan. I noticed, that for conection establishing the phone peripheral must be much closer to DK, than it must be during functionalen-USTelligent Community 13Fri, 28 Aug 2020 10:21:26 GMThttps://devzone.nordicsemi.com/thread/266953?ContentTypeID=1Fri, 28 Aug 2020 10:21:26 GMT137ad170-7792-4731-bb38-c0d22fbe4515:360407d7-bb5f-4c5f-9892-8338284e33c9Joakim Jakobsen<p>Hi Pavel!</p> <p>As far as I know, there aren˙t any RSSI filters in the softdevice that would prevent connection. This will be handled by the application.&nbsp;</p> <p>So as long as you have not enabled this filter in the application this should not be the cause.&nbsp;</p> [quote user=""]conection establishing the phone peripheral must be much closer to DK[/quote] <p>If you using a Phone to connect, then there might be some restrictions on the phone side that is out of our control.&nbsp;</p> <p>Have you tried using 2 DK˙s, both for the central and the peripheral?</p> <p>Br,&nbsp;<br />Joakim&nbsp;</p><div style="clear:both;"></div>