https://devzone.nordicsemi.com/f/nordic-q-a/3470/nrf51422-uart-problemHello all, I am using nRFgo motherboard(nRF6310) and nRF51422 DK(s310) and MDK_ARM(keil Version 5 IDE) to build the sample code. It seems workable to program and download code. Now I&#39;m confused about the UART communication. I am using externalen-USTelligent Community 13Wed, 27 Aug 2014 01:23:52 GMThttps://devzone.nordicsemi.com/thread/12550?ContentTypeID=1Wed, 27 Aug 2014 01:23:52 GMT137ad170-7792-4731-bb38-c0d22fbe4515:d2c7dd03-0e5e-4116-ae57-6d6bc6ff416eRita<p>I solved the problem already! Thanks.. After downloading the code, it must tune on the chip again.</p><div style="clear:both;"></div>