Subject: Cannot use GPIO P0.19 on nRF9160 as UART TX pinhttps://devzone.nordicsemi.com/f/nordic-q-a/123248/subject-cannot-use-gpio-p0-19-on-nrf9160-as-uart-tx-pinHi everyone, I&#39;m working with the nRF9160 and trying to configure P0.19 as the UART TX pin using Zephyr. Here&#39;s the configuration I used in the device tree: uart1_default: uart1_default { group1 { psels = &lt;NRF_PSEL(UART_TX, 0, 19)&gt;; // TX in boarden-USTelligent Community 13Mon, 28 Jul 2025 11:53:07 GMTRE: Subject: Cannot use GPIO P0.19 on nRF9160 as UART TX pinhttps://devzone.nordicsemi.com/thread/543731?ContentTypeID=1Mon, 28 Jul 2025 11:53:07 GMT137ad170-7792-4731-bb38-c0d22fbe4515:78062e6f-67da-4a8f-838b-512cde8a60carunsiv<p>In general if you are using a custom board I would create a custom board target. We have a pretty great guide on how to do it <a href="https://academy.nordicsemi.com/courses/nrf-connect-sdk-intermediate/lessons/lesson-3-adding-custom-board-support/">here</a></p> <p>Regards</p> <p>Runar</p><div style="clear:both;"></div>RE: Subject: Cannot use GPIO P0.19 on nRF9160 as UART TX pinhttps://devzone.nordicsemi.com/thread/543708?ContentTypeID=1Mon, 28 Jul 2025 09:51:13 GMT137ad170-7792-4731-bb38-c0d22fbe4515:69ec59b4-08b8-4aa0-a1bf-c148344b8c4dthwcs7<p>&quot;Ohh, I&#39;m using <code data-start="115" data-end="135">nrf9160_nrf9160_ns</code> as the target for my board. After building, I checked the <code data-start="194" data-end="206">zephyr.dts</code> file and noticed that there are some references to the nRF52840. I think I should either remove or comment them out. In your opinion, which approach would be better?&quot;</p><div style="clear:both;"></div>RE: Subject: Cannot use GPIO P0.19 on nRF9160 as UART TX pinhttps://devzone.nordicsemi.com/thread/543705?ContentTypeID=1Mon, 28 Jul 2025 09:45:05 GMT137ad170-7792-4731-bb38-c0d22fbe4515:f3cea19a-3dd4-4407-94f4-6cdf21cdc8cerunsiv<p>Sorry I was a bit unclear in my wording. Let me rephrase. In VScode are you using a custom board you have created yourself as the board target? If you are using the DK as your board target you would need to disable in your overlay the peripherals used to communicate with nrf52840 in the dk. This you would find in the board files for the dk, and just disable in the overlay files</p> <p>Regards</p> <p>Runar</p><div style="clear:both;"></div>RE: Subject: Cannot use GPIO P0.19 on nRF9160 as UART TX pinhttps://devzone.nordicsemi.com/thread/543701?ContentTypeID=1Mon, 28 Jul 2025 09:27:23 GMT137ad170-7792-4731-bb38-c0d22fbe4515:d2748b83-763f-4e40-a365-d0455e650fb4thwcs7<p><img style="max-height:240px;max-width:320px;" alt=" " src="https://devzone.nordicsemi.com/resized-image/__size/640x480/__key/communityserver-discussions-components-files/4/5aa2b9881da594fbcdb4.jpg" /></p><div style="clear:both;"></div>RE: Subject: Cannot use GPIO P0.19 on nRF9160 as UART TX pinhttps://devzone.nordicsemi.com/thread/543700?ContentTypeID=1Mon, 28 Jul 2025 09:26:32 GMT137ad170-7792-4731-bb38-c0d22fbe4515:c02afa78-859b-411c-a79c-9dcc5c8de959thwcs7<p>It&#39;s just as simple as this.<img style="max-height:240px;max-width:320px;" alt=" " src="https://devzone.nordicsemi.com/resized-image/__size/640x480/__key/communityserver-discussions-components-files/4/fc5714ba_2D00_fbb7_2D00_4106_2D00_ab2a_2D00_adf551385d5f.jpeg" /><img style="max-height:240px;max-width:320px;" alt=" " src="https://devzone.nordicsemi.com/resized-image/__size/640x480/__key/communityserver-discussions-components-files/4/fc5714ba_2D00_fbb7_2D00_4106_2D00_ab2a_2D00_adf551385d5f.jpeg" /></p><div style="clear:both;"></div>RE: Subject: Cannot use GPIO P0.19 on nRF9160 as UART TX pinhttps://devzone.nordicsemi.com/thread/543695?ContentTypeID=1Mon, 28 Jul 2025 08:56:20 GMT137ad170-7792-4731-bb38-c0d22fbe4515:3f62b93a-32b2-44a4-b13b-c82b1d4ba360runsiv<p>Interesting, it should not be anything stopping you from using P0.19. Have you created your own custom board?&nbsp;<br />If so could you upload the board files and the full overlay so I can have a look at it</p> <p>Regards</p> <p>Runar</p><div style="clear:both;"></div>RE: Subject: Cannot use GPIO P0.19 on nRF9160 as UART TX pinhttps://devzone.nordicsemi.com/thread/543654?ContentTypeID=1Sat, 26 Jul 2025 03:22:08 GMT137ad170-7792-4731-bb38-c0d22fbe4515:fbab4464-1146-4cc9-af9a-ce09ae31f2f1thwcs7<div> <div> <div class="flex max-w-full flex-col grow"> <div dir="auto" data-message-author-role="assistant" data-message-id="6d7d9cbe-3626-4c0f-9b03-1b97e13fb5b4" data-message-model-slug="gpt-4o"> <div> <div class="markdown prose dark:prose-invert w-full break-words dark"> <p data-start="71" data-end="175" data-is-last-node="" data-is-only-node=""><strong data-start="71" data-end="175" data-is-last-node="">I don&#39;t think so. I&#39;m using a custom board for my specific application, based on the nRF9160-SIxA.</strong></p> </div> </div> </div> </div> </div> </div><div style="clear:both;"></div>RE: Subject: Cannot use GPIO P0.19 on nRF9160 as UART TX pinhttps://devzone.nordicsemi.com/thread/543602?ContentTypeID=1Fri, 25 Jul 2025 11:32:44 GMT137ad170-7792-4731-bb38-c0d22fbe4515:4c605092-e0c8-4234-9634-f2649102836brunsiv<p>Hi</p> <p>Are you using the 9160DK?&nbsp;</p> <p>As you can see <a href="https://docs.nordicsemi.com/bundle/ug_nrf9160_dk/page/UG/nrf91_DK/hw_description/nrf9160_board_controller.html">here</a>&nbsp;and at the bottom side the DK. P0.19 is connect to the 52840 and I suspect this is what it causing issues for you</p> <p>Regards</p> <p>Runar</p><div style="clear:both;"></div>