https://devzone.nordicsemi.com/f/nordic-q-a/63732/warning-when-setting-rts-cts-to-disconnect-in-ncsHI, I set RTS,CTS to disconnect in the overlay file. (Toolchain Manager.0.6.1/NCS1.3.0) &amp;uart0 { rts-pin = &lt;0xFFFFFFFF&gt;; cts-pin = &lt;0xFFFFFFFF&gt;; }; warnings occur in the inline function as shown below. Previously, I set it to 0xffffffffffen-USTelligent Community 13Mon, 20 Jul 2020 15:16:28 GMThttps://devzone.nordicsemi.com/thread/260859?ContentTypeID=1Mon, 20 Jul 2020 15:16:28 GMT137ad170-7792-4731-bb38-c0d22fbe4515:8065f6ca-297c-40c9-99f3-5bc523cb8c11Simon<p>Try to use /delete property/ instead, as explained <a href="https://docs.zephyrproject.org/latest/guides/dts/howtos.html#use-devicetree-overlays">here</a>&nbsp;and done <a href="https://github.com/nrfconnect/sdk-zephyr/blob/4ebad02e3e270169220a9959f8c9ea6ba88f2e28/boards/shields/x_nucleo_iks01a2/boards/stm32mp157c_dk2.overlay#L14">here</a>. However, if you would like to disable flow control, I think the correct way of doing it is to disable flow control in prj.conf, then these fields will be neglected.</p> <p>Best regards,</p> <p>Simon</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/260001?ContentTypeID=1Tue, 14 Jul 2020 23:54:40 GMT137ad170-7792-4731-bb38-c0d22fbe4515:aedf4166-d869-4a87-8a50-03d7d173814enoseed<p>Hi,&nbsp;</p> <p>I was testing Peripheral_uart and nRF52-DK.</p> <p><img alt=" " src="https://devzone.nordicsemi.com/resized-image/__size/320x240/__key/communityserver-discussions-components-files/4/proj.jpg" /></p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/259919?ContentTypeID=1Tue, 14 Jul 2020 13:10:44 GMT137ad170-7792-4731-bb38-c0d22fbe4515:e2b7058a-2326-420b-bb15-a2b3d28cdf90Sigurd<p>Hi,</p> <p>I was not able to reproduce this.</p> <p>What board and sample are you testing ?</p><div style="clear:both;"></div>