https://devzone.nordicsemi.com/f/nordic-q-a/82654/need-help-with-i2c2-on-nrf9160dkI&#39;m trying to get basic i2c code working on my Nordic nFR9160DK board. I&#39;m new to the platform and have been doing a lot of reading and searching through examples. Through these efforts, I&#39;ve managed to scrape together some code that I&#39;m hoping is closeen-USTelligent Community 13Mon, 13 Dec 2021 10:23:23 GMThttps://devzone.nordicsemi.com/thread/343112?ContentTypeID=1Mon, 13 Dec 2021 10:23:23 GMT137ad170-7792-4731-bb38-c0d22fbe4515:8899d98a-7880-4143-a13b-0874dda0a57dAlbrecht Markus Schellenberger<p>Hello Robert,</p> [quote user=""]<p><span style="font-size:inherit;">Again, the error I&#39;m getting is &quot;<span>&#39;DT_N_ALIAS_i2c_2_P_label&#39; undeclared&quot;. I understand from my reading that this is a generated macro, but beyond that my knowledge is a bit hazy. The error seems to originate at the following line in main.c</span></span></p> <div> <div></div></div>[/quote] <p>I suggest you to use the following line instead:</p> <p><pre class="ui-code" data-mode="text">#define I2C_DEV DT_LABEL(DT_NODELABEL(i2c2))</pre></p> [quote user=""]nrf9160_pca10090ns.overlay[/quote] <p>If you want&nbsp;the overlay file to be considered for your nRF9160 DK, you have to rename it to <em>nrf9160dk_nrf9160_ns</em> in NCS v.1.7.x.</p> <p>I hope this will help you!</p> <p>Regards,</p> <p>Markus</p><div style="clear:both;"></div>