https://devzone.nordicsemi.com/f/nordic-q-a/79974/how-to-enable-rtt-shell-in-matter-exampleHi, I built the lighting-app( Link ) and run on nrf52840 DK. Then, I tried to replace the serial shell console with RTT shell console. I append the configs below to the prj.conf to enable RTT shell: #enable rtt shell CONFIG_UART_CONSOLE=n CONFIG_SHELL_BACKEND_SERIALen-USTelligent Community 13Fri, 24 Sep 2021 16:31:23 GMThttps://devzone.nordicsemi.com/thread/331146?ContentTypeID=1Fri, 24 Sep 2021 16:31:23 GMT137ad170-7792-4731-bb38-c0d22fbe4515:4d5484e7-4efc-4b9e-91a9-22ee4432d4e0&#216;yvind<p>Hello,&nbsp;<br /><br />My initial question is have you enabeld CONFIG_SHELL?</p> <p>I see you are not using the official Nordic samples, have you <a href="https://developer.nordicsemi.com/nRF_Connect_SDK/doc/1.7.0/nrf/samples/samples_matter.html#matter-samples">tried with on our Matter samples?</a>&nbsp;Does it make a difference? I do not think there should be a difference, it&#39;s just that I do not know the samples provided by&nbsp;<a href="https://github.com/project-chip/connectedhomeip">https://github.com/project-chip/connectedhomeip</a></p> <p>I will need to test this on Monday.&nbsp;</p> <p>Kind regards,<br />Øyvind</p><div style="clear:both;"></div>