https://devzone.nordicsemi.com/f/nordic-q-a/93311/i2c-and-nrf9160dkHello I use nRF9160DK. Can somebody tell me why it doesn&#39;t give an error ( ) if I don&#39;t have anything on the I2C line, or how can I be sure if it finds the right address? And if I add a sensor with the address &lt;0X43&gt; to the line, it&#39;s still theen-USTelligent Community 13Thu, 27 Oct 2022 13:00:07 GMThttps://devzone.nordicsemi.com/thread/392841?ContentTypeID=1Thu, 27 Oct 2022 13:00:07 GMT137ad170-7792-4731-bb38-c0d22fbe4515:8b0302ef-bc8a-4427-aed2-b4937bcf290cAchim Kraus<p>I&#39;m not that common, but I guess there are some assumptions, which doesn&#39;t match.</p> <p>1. The I2C bus is controlled by the nRF9160 and that doesn&#39;t depend on sensors connected to that bus. Therefore the OK is more, that the nRf9160 has such an I2C controller.</p> <p>2. your app crashs and reboots, I guess, &quot;%p&quot; requires &quot;&amp;dev_i2c&quot; not &quot;dev_i2c&quot;. Does the compiler warns about that?</p> <p>3. The Thingy:91 uses I2C for sensors. Maybe you check there in that board definition how to use an I2C sensor.</p><div style="clear:both;"></div>