https://devzone.nordicsemi.com/f/nordic-q-a/117138/enable-rttHi , I have a basic project with Hello World project , NCS 2.8.0. To enable RTT I&#39;ve added to prj.conf the following CONFIG_USE_SEGGER_RTT =y CONFIG_LOG_BACKEND_RTT =y CONFIG_UART_CONSOLE =n When connecting RTT terminal I can see the followingen-USTelligent Community 13Mon, 09 Dec 2024 17:37:45 GMThttps://devzone.nordicsemi.com/thread/514106?ContentTypeID=1Mon, 09 Dec 2024 17:37:45 GMT137ad170-7792-4731-bb38-c0d22fbe4515:ff6631cb-4111-499e-87dc-c31bbf5dc037lsoria<p>Hi, the hello_world sample uses<span style="font-family:courier new, courier;"> printf()</span>, which AFAIK is redirected to the UART console.</p> <ul> <li>What happens if you replace <span style="font-family:courier new, courier;">printf()</span> with <span style="font-family:courier new, courier;">printk()</span>? In order to do so, you must include<span style="font-family:courier new, courier;"> <strong>&lt;zephyr/sys/printk.h&gt;</strong></span></li> <li>Other config that may be required to be set is <span style="font-family:courier new, courier;"><strong>CONFIG_RTT_CONSOLE</strong></span></li> <li>If that is not enough, you may also need to add <span style="font-family:courier new, courier;"><strong>CONFIG_LOG_PRINTK</strong> </span>to redirect <span style="font-family:courier new, courier;">printk</span> messages to the logging subsystem (which I don&#39;t think so because you&#39;re not using the log subsystem)</li> <li>Finally, maybe <span style="font-family:courier new, courier;"><strong>CONFIG_STDOUT_CONSOLE</strong> </span>with <span style="font-family:courier new, courier;"><strong>CONFIG_RTT_CONSOLE</strong> </span>may allow <span style="font-family:courier new, courier;">printf</span> calls to be redirected to RTT, but I&#39;m not sure.</li> </ul> <p>Hope this helps.</p><div style="clear:both;"></div>