https://devzone.nordicsemi.com/f/nordic-q-a/58899/what-needs-to-be-done-to-enable-the-serial-and-uarte-featuresHi! I am trying to enable UARTE and Serial in my app, but somehow the nrf_serial code is not compiled because it fails the &quot;#if NRF_MODULE_ENABLED(NRF_SERIAL)&quot; test. How do I select this? I do not see &quot;NRF_SERIAL&quot; in the sdk_config.h file. I have enableden-USTelligent Community 13Tue, 10 Mar 2020 13:09:44 GMThttps://devzone.nordicsemi.com/thread/239114?ContentTypeID=1Tue, 10 Mar 2020 13:09:44 GMT137ad170-7792-4731-bb38-c0d22fbe4515:805d1d3c-675f-4b91-b6c0-80f436ce22afSimon<p>In order to use the functions in nrf_serial.h/c, you have to set&nbsp;NRF_SERIAL_ENABLED to 1 in <em>sdk_config.h</em>, then the test &quot;<span>NRF_MODULE_ENABLED(NRF_SERIAL)&quot; will succeed. The reason for this is because the macro&nbsp;NRF_MODULE_ENABLED will append &quot;_ENABLED&quot; at the end of the input and check that configuration:</span></p> <p><span><pre class="ui-code" data-mode="c_cpp">#define NRF_MODULE_ENABLED(module) \ ((defined(module ## _ENABLED) &amp;&amp; (module ## _ENABLED)) ? 1 : 0) #endif</pre></span><span><br /></span></p> <p><span>Best regards,</span></p> <p><span>Simon</span></p><div style="clear:both;"></div>