https://devzone.nordicsemi.com/f/nordic-q-a/74461/at-commands-from-application-spaceI have my first custom nRF9160 prototype boards back and they seem to be working pretty well. One question I do have is that I have been unable to find a clear concise description of how to send an AT command from within main.c in the application spaceen-USTelligent Community 13Wed, 28 Apr 2021 13:38:10 GMThttps://devzone.nordicsemi.com/thread/307280?ContentTypeID=1Wed, 28 Apr 2021 13:38:10 GMT137ad170-7792-4731-bb38-c0d22fbe4515:917cce78-da6a-4d1b-bc58-ae8596f0efeaAlbrecht Markus Schellenberger<p>Hello Joe,</p> <p>In general, the modem will start automatically if the <a href="https://developer.nordicsemi.com/nRF_Connect_SDK/doc/1.5.1/nrfxlib/nrf_modem/README.html">modem library</a> is initialised.</p> <p>To able to use the function <em>at_cmd_write</em>, the <a href="https://developer.nordicsemi.com/nRF_Connect_SDK/doc/1.5.1/nrf/include/modem/at_cmd.html">AT command interface library</a> must be initialised first.</p> <p>The AT Client sample uses the <a href="https://developer.nordicsemi.com/nRF_Connect_SDK/doc/1.5.1/nrf/lib/at_host/lib_at_host.html#lib-at-host">AT Host library</a> which includes the above-mentioned steps.</p> <p>So yes, if you are going to use the AT Host together with your application it is as simple as you described.</p> <p>I hope this will help you!</p> <p>Regards,</p> <p>Markus</p><div style="clear:both;"></div>