https://devzone.nordicsemi.com/f/nordic-q-a/84932/testing-out-uart-on-the-dongle-nrf52hi I sucessfully tested the blinky project on the nRF52840 dongle... btw i&#39;m using vanilla zephyr... but i&#39;m unable to prototype the uart comm on this board... the board .dts file has the following config: &amp;uart0 { compatible = &quot;nordic,nrf-uarteen-USTelligent Community 13Tue, 22 Feb 2022 12:50:49 GMThttps://devzone.nordicsemi.com/thread/354348?ContentTypeID=1Tue, 22 Feb 2022 12:50:49 GMT137ad170-7792-4731-bb38-c0d22fbe4515:0c600acc-f8ce-4d63-83a1-c63f0d69da2fJared<p>Hi there,</p> <p>Are you using an example from NCS, such as the Low power UART example?</p> <p>regards</p> <p>Jared&nbsp;</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/353959?ContentTypeID=1Fri, 18 Feb 2022 23:05:29 GMT137ad170-7792-4731-bb38-c0d22fbe4515:9520afe0-1aed-4ac0-99ef-37c9bb21eeafntn888<p>maybe i&#39;m not understanding the pins right... doesnt the nRF52840 have 2 gpio banks? what&#39;s plain &lt;20&gt; indicating?</p><div style="clear:both;"></div>