https://devzone.nordicsemi.com/f/nordic-q-a/33194/nrf52-dk-uart-communication-with-rn2903-module-uart-interfaceRN2903 is LoraWAN module using ASCII Command Interface over UART. RN2903 is connected with nRF52-DK. I&#39;m connected uart line tx, rx gnd.(cross connect...) UART communication is only working well when connected to virtual com port. When both theen-USTelligent Community 13Mon, 09 Apr 2018 13:40:10 GMThttps://devzone.nordicsemi.com/thread/127450?ContentTypeID=1Mon, 09 Apr 2018 13:40:10 GMT137ad170-7792-4731-bb38-c0d22fbe4515:0201f111-bc5e-4847-b50f-3eecdc2ae7edEdvin<p>Hello,</p> <p>&nbsp;</p> <p>Do you have another DK that you can run an experiment on?&nbsp;</p> <p>With your firmware, try to use the pins 11 and 12, as you already have tried.&nbsp;</p> <p>On the other board, erase the board, and plug it into a computer connected to e.g. Termite, putty, or another UART terminal (to monitor traffic).</p> <p>Then short pins 11 and 12 on the board with the project to pins 6 and 8 on the other, and see if you can see the uart messages, and if the board can detect messages coming in as well.</p> <p>&nbsp;</p> <p>Best regards,</p> <p>Edvin</p><div style="clear:both;"></div>