I2C -> to enable the I2C driver by kernel. Then you can check if the I2C is enabled: lsmod If I2C enabled, the terminal echoes an i2c-bcm2708 device. Or on the PI 4 just use the desktop raspberry icon to open “Preferences”, then “Raspberry Pi Configuration”, and select the “Interfaces” tab, then click enable for the I2C. In order to enable it we have two options: enable it “on-demand” or enable it by modifying some configuration files so it’s enabled by default at every start-up. :D When you are finished in raspi-config reboot for the i2c modules to automatically load into the kernel. In each of the examples the ID 1 is used, for example “sudo i2cdetect -y 1”. In the Raspberry Pi Software Configuration Tool, navigate to ‘Interfacing Options’. Are you using a Raspberry Pi? With the I2C port 0 so the following discussion is oriented around steps... Command: sudo reboot the Raspberry Pi the yellow LED on the Pi. 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