Raspberry Pi 3 Cookbook for Python Programmers - Third Edition

Getting ready

The I²C bus is not enabled in all Raspberry Pi images; therefore, we need to enable the module and install some supporting tools. Newer versions of Raspbian use device trees to handle hardware peripherals and drivers.

In order to make use of the I²C bus, we need to enable the ARM I²C in the bootconfig.txt file.

You can do this automatically using the following command:

sudo raspi-config

Select Advanced Options from the menu and then select I²C, as shown in the following screenshot. When asked, select Yes to enable the interface and then click Yes to load the module by default:

The raspi-config menu

From the menu, select I2C