https://devzone.nordicsemi.com/f/nordic-q-a/61864/unable-to-use-rtt-in-nrf91Hi all, I&#39;m trying to get the Thingy device work with (SEGGER&#39;s) RTT. I used the asset_tracker sample application and edited it to just print to RTT in a loop after all inits. Sadly, printing to RTT never outputs anything on the RTT Client. I&#39;ve alreadyen-USTelligent Community 13Tue, 16 Jun 2020 08:41:25 GMThttps://devzone.nordicsemi.com/thread/255180?ContentTypeID=1Tue, 16 Jun 2020 08:41:25 GMT137ad170-7792-4731-bb38-c0d22fbe4515:959f71ce-af55-414a-a49c-0109592b3aa3MosheSmartAmr<p>nevermind it worked after SW update.&nbsp;</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/254301?ContentTypeID=1Wed, 10 Jun 2020 14:30:38 GMT137ad170-7792-4731-bb38-c0d22fbe4515:78d55ad9-4c78-4c90-ad29-d3c5421c68d7MosheSmartAmr<p>Thanks Simon.</p> <p>I still get this after setting the&nbsp;RTT viewer (seems like the DK is not recognized bt the RTT VIEWER):</p> <p><img alt=" " src="https://devzone.nordicsemi.com/resized-image/__size/960x720/__key/communityserver-discussions-components-files/4/WhatsApp-Image-2020_2D00_06_2D00_10-at-15.40.51.jpeg" /></p> <p></p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/251989?ContentTypeID=1Wed, 27 May 2020 14:00:25 GMT137ad170-7792-4731-bb38-c0d22fbe4515:77fbbb65-88e8-4adf-8d29-c34ff1b7a6acSimon<p style="color:#000000;font-family:Arial, Helvetica, sans-serif;font-size:12px;font-style:normal;font-weight:400;letter-spacing:normal;margin-top:0px;text-align:start;text-indent:0px;text-transform:none;white-space:normal;">I was able to make it work, I did the following:</p> <ul style="color:#000000;font-family:Arial, Helvetica, sans-serif;font-size:12px;font-style:normal;font-weight:400;letter-spacing:normal;text-align:start;text-indent:0px;text-transform:none;white-space:normal;"> <li>Connected the Thingy:91 to an nRF91 DK using a cable like<span>&nbsp;</span><a href="https://odseven.com/products/10-pin-2x5-socket-1-27mm-idc-swd-cable-150mm-long">this</a></li> <li>Modified&nbsp;ncs\zephyr\samples\hello_world: <ul> <li>Added&nbsp;include($ENV{ZEPHYR_BASE}/../nrf/cmake/boilerplate.cmake) to CMakeLists.txt</li> <li>Added these configurations to prj.conf:</li> </ul> </li> </ul> <p><pre class="ui-code" data-mode="text">CONFIG_UART_CONSOLE=n CONFIG_RTT_CONSOLE=y CONFIG_USE_SEGGER_RTT=y</pre></p> <ul> <li>Then I programmed and flashed the Thingy trough the 91 DK debugger</li> <li>Opened J-Link RTT Viewer:</li> </ul> <p><img src="https://devzone.nordicsemi.com/resized-image/__size/320x240/__key/support-attachments/beef5d1b77644c448dabff31668f3a47-abd5629aa0da44259b256e848b4f9d5b/pastedimage1590587876174v1.png" alt=" " /></p> <p>It worked (I put the log in a while(true) loop with a delay)</p> <p><img src="https://devzone.nordicsemi.com/resized-image/__size/320x240/__key/support-attachments/beef5d1b77644c448dabff31668f3a47-abd5629aa0da44259b256e848b4f9d5b/pastedimage1590587948194v2.png" alt=" " /></p> <p><span style="text-decoration:underline;">It is important to not disconnect the 10-pin cable that goes between the Thingy:91 and the 91 DK, since the RTT logging goes through this</span></p> <p>Best regards,</p> <p>Simon</p><div style="clear:both;"></div>