https://devzone.nordicsemi.com/f/nordic-q-a/116212/issue-with-uart-communication-on-nrf52840-dk-v3-0-0I recently purchased an nRF52840 DK (v3.0.0) to use with my custom nRF9160 boards for firmware loading, debugging, and loading certificates for nRF Cloud. While I can successfully load firmware and debug, I&#39;m encountering an issue when trying to use theen-USTelligent Community 13Tue, 12 Nov 2024 10:02:05 GMThttps://devzone.nordicsemi.com/thread/510061?ContentTypeID=1Tue, 12 Nov 2024 10:02:05 GMT137ad170-7792-4731-bb38-c0d22fbe4515:ca3da623-5ca7-42c2-a6a1-42413a823adfPriyanka<p>Hi,</p> <p>Since this is the newer revision, it will be using the nRF5340 SoC as the interface MCU compared to the SEGGER chip on your previous revision DK. You can <a href="https://github.com/nrfconnect/sdk-zephyr/blob/main/boards/nordic/nrf52840dk/nrf52840dk_nrf52840-pinctrl.dtsi">see here</a> that in the pull up is enabled for the pins by default. But I am not sure if this is the issue, because then you should have had the problem when uploading the firmware and debugging.</p> [quote user=""]UART RX pin (P0.06) [/quote] <p>The P0.06 is the TX and P0.08 is the RX. Did you interchange them?</p> <p>Also, please upload the errors that you see when you try to load the certificates so that we can try to check the problem in detail.</p> <p>-Priyanka</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/510000?ContentTypeID=1Tue, 12 Nov 2024 00:49:19 GMT137ad170-7792-4731-bb38-c0d22fbe4515:83cdacfe-ec98-47b6-8e8f-9b888dd2490dh.omer<p>Hello,</p> <p>I just wanted to follow up to check if there are any updates regarding my previous message.</p> <p>Thank you, and I look forward to hearing from you.</p> <p>Best regards,<br /><span>H.&Ouml;mer G&uuml;rsoy</span></p><div style="clear:both;"></div>