Talking to hardware from your development board is when the real fun starts with a project. You can connect sensors, actuators, and more to make your project come alive with motion, sensation, sound, etc. However to communicate with other hardware typically requires knowledge of a serial protocol like I2C or SPI. These protocols are the common language that chips and add-on boards talk so they can be connected to a development board. The board knows how to ‘speak’ these protocols and control the connected hardware. This guide explores two very common serial protocols, I2C and SPI.

This guide was first published on Sep 13, 2017. It was last updated on Sep 13, 2017.

This page (Overview) was last updated on Aug 16, 2022.

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