https://devzone.nordicsemi.com/f/nordic-q-a/101371/i2c-master-driver-problems-using-zephy-devicetree-methodDear sir: We use the VS code IDE with NRF connect SDK 2.4.0 for matter door lock application. We have the problems with the I2C master driver to the motor device. The DT overlay file is defined as follow: &amp; i2c0 { compatible = &quot;nordic,nrfen-USTelligent Community 13Fri, 30 Jun 2023 07:17:46 GMThttps://devzone.nordicsemi.com/thread/433843?ContentTypeID=1Fri, 30 Jun 2023 07:17:46 GMT137ad170-7792-4731-bb38-c0d22fbe4515:2c55ff1a-289c-4035-ae2a-7bb2776c3b2bHenry_Chou<p>Finally,.....We fix the issue.</p> <p>Because the slave address in overlay file should be divided by 2,&nbsp;</p> <p>The exactly address should be 0x30. Isuue is soloved.</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/433838?ContentTypeID=1Fri, 30 Jun 2023 06:51:20 GMT137ad170-7792-4731-bb38-c0d22fbe4515:7cbffe4c-196d-47fb-b74a-e337bc695a0cHenry_Chou<p>Fix the bug......</p> <div><span>&nbsp; &nbsp; // GPIO_write(CONFIG_GPIO_MTRINT, 0); // wakeup MCU</span></div> <div><span>&nbsp; &nbsp;&nbsp;</span><span>LOG_INF</span><span>(</span><span>&quot;Enter writeTiny&quot;</span><span>);</span></div> <div><span>&nbsp; &nbsp; gpio_pin_set_dt(&amp;mtrint, 0);&nbsp;&nbsp;&nbsp;//</span><span>gpio_pin_set_dt</span><span>(</span><span>&amp;</span><span>mtrint</span><span>,&nbsp;</span><span>1</span><span>);&nbsp; Wake up level should be low,The other should be high.</span></div> <div><span>But the I2C SDA still is NACK.</span></div> <div><span></span></div><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/433832?ContentTypeID=1Fri, 30 Jun 2023 06:05:32 GMT137ad170-7792-4731-bb38-c0d22fbe4515:afb480dd-a17c-4e2f-915c-3954b98f9e70Henry_Chou<p>Update the status.....</p> <p>Signal from I2C bus is NACK.......</p> <p><img style="max-height:240px;max-width:320px;" src="https://devzone.nordicsemi.com/resized-image/__size/640x480/__key/communityserver-discussions-components-files/4/_A287555EF764D6536B756297_-2023_2D00_06_2D00_30-134259.png" alt=" " /></p> <p>But the motor driver device which is used working as the other MCU.</p><div style="clear:both;"></div>