https://devzone.nordicsemi.com/f/nordic-q-a/113320/how-can-i-overlay-dtsI&#39;m alter the overlay file to adapt my board. In my board,I try to use pin 9,10 as uart_tx and uart_rx,without cts and rts. I wirte it in my app.overlay as follow: The build error output as that: It seem like device tree problem. How shoulden-USTelligent Community 13Wed, 24 Jul 2024 13:39:37 GMThttps://devzone.nordicsemi.com/thread/495439?ContentTypeID=1Wed, 24 Jul 2024 13:39:37 GMT137ad170-7792-4731-bb38-c0d22fbe4515:253f503b-65ac-48ed-a41e-c87ea2261aacSwRa<p>Hello,</p> <p>Are you trying to use&nbsp; UART0 or UART1.? there is a mix up between the two here. Also, to use UART without CTS/RTS, you will need to disable flow control.</p> <p>Regards,</p> <p>Swathy</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/495131?ContentTypeID=1Tue, 23 Jul 2024 06:30:17 GMT137ad170-7792-4731-bb38-c0d22fbe4515:73afc2eb-63ce-4c2f-aee9-df20a0c5bbd4Chaoyue Ying<p>It still error.</p> <p>I think it just a label so use uart0.And uart1 is undefined.</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/495127?ContentTypeID=1Tue, 23 Jul 2024 06:25:31 GMT137ad170-7792-4731-bb38-c0d22fbe4515:c23f2363-988d-4387-8132-343a6ce3ce41backstreet.devisor<p>Hi.</p> <p>There may be an error in line 47.<br />Try &amp;uart1 instead of &amp;uart0.</p><div style="clear:both;"></div>