https://devzone.nordicsemi.com/f/nordic-q-a/68121/nrf52-uart-custom-boardHello, all .. I&#39;m using nrf52 pca10040, s132.. I connected custom board and nrf52, and would like to communicate with uart. First of all, custom board is model cm1106 which is a co2 measuring instrument. I don&#39;t know how to approach it becauseen-USTelligent Community 13Tue, 10 Nov 2020 15:56:51 GMThttps://devzone.nordicsemi.com/thread/279332?ContentTypeID=1Tue, 10 Nov 2020 15:56:51 GMT137ad170-7792-4731-bb38-c0d22fbe4515:96988d48-5195-44c5-b1a2-9e1e696316beJared<p>Hi,</p> <p>The <a href="https://infocenter.nordicsemi.com/topic/sdk_nrf5_v17.0.2/uart_example.html?cp=7_1_4_6_48">UART example in the SDK</a> would be a good start, it shows you how you can use the the UART peripheral on the nRF52.&nbsp;</p> [quote user=""]<p><span>Do I need to do &#39;init&#39; for custom board, just like &#39;uart_init&#39; of nordic?ㄹ</span></p> <p></p>[/quote] <p>&nbsp;You most probably need to run some UART routine on the other side.&nbsp;</p> <p>regards</p> <p>Jared&nbsp;</p><div style="clear:both;"></div>