https://devzone.nordicsemi.com/f/nordic-q-a/69701/uarte-baud-to-non-standard-value-in-zephyrTo setup the UARTE for use in Zephyr I&#39;ve configured a nrf52840dk_nrf52840.overlay as Zephyr documentation suggests: &amp; uart1 { compatible = &quot;nordic,nrf-uarte&quot; ; current-speed = &lt; 1000000 &gt;; status = &quot;okay&quot; ; tx-pin = &lt; 14 &gt;; en-USTelligent Community 13Mon, 21 Dec 2020 15:04:43 GMThttps://devzone.nordicsemi.com/thread/286094?ContentTypeID=1Mon, 21 Dec 2020 15:04:43 GMT137ad170-7792-4731-bb38-c0d22fbe4515:1e0d7079-7f66-473e-a234-c4fbcd9b56d5_r_y_a_n<p>I have found a working solution by setting the BAUDRATE register directly,&nbsp;following the solution described on this page:</p> <p><a href="https://community.particle.io/t/solved-non-standard-baud-rate/48064">https://community.particle.io/t/solved-non-standard-baud-rate/48064</a></p> <p>I calculated the register value using previous posts on this forum such as:</p> <p><a href="https://devzone.nordicsemi.com/f/nordic-q-a/391/uart-baudrate-register-values">https://devzone.nordicsemi.com/f/nordic-q-a/391/uart-baudrate-register-values</a></p> <p></p> <p>For future reference:&nbsp;<span>It is probably important to note, i</span>n the specific case of Zephyr setup the .overlay file still needs a standard baud rate when the device starts up, otherwise it will crash when that UART tries to initialise because it will find no value in the lookup table of <span>uart_nrfx_uarte.c</span>. Then anytime after this it is possible to reset to BAUDRATE register to the desired value.</p><div style="clear:both;"></div>