https://devzone.nordicsemi.com/f/nordic-q-a/121848/nrf5340-pcf8574-with-i2cHello, I am using the nRF5340DK and the PCF8574 with I2C communication. The issue I am encountering is that the function device_is_ready(pcf8574.bus) fails to initialize the I2C bus, causing my program to hang at this point with the message: &quot;I2C deviceen-USTelligent Community 13Wed, 28 May 2025 14:13:48 GMThttps://devzone.nordicsemi.com/thread/537387?ContentTypeID=1Wed, 28 May 2025 14:13:48 GMT137ad170-7792-4731-bb38-c0d22fbe4515:d2f1abad-0fae-4774-9ec9-b3848654fd61Vidar Berg<p>Hi,&nbsp;</p> <p>I don&#39;t see&nbsp;any obvious problems in the project configuration or DT overlay you posted.&nbsp;Please try the attached sample to see if you get the same error.&nbsp;</p> <p><a href="https://devzone.nordicsemi.com/cfs-file/__key/communityserver-discussions-components-files/4/hello_5F00_world_5F00_5340dk_5F00_i2c.zip">devzone.nordicsemi.com/.../hello_5F00_world_5F00_5340dk_5F00_i2c.zip</a></p> <p>Best regards,</p> <p>Vidar</p><div style="clear:both;"></div>