I2C

Contributors:

SFUptownMaker

Resources and Going Further

I²C is a relatively complex interface, and there are many resources out there to help you deal with it. Below are some of the more informative ones.

Wikipedia Article on I²C - Not great, but not a terrible place to start.
- Terminology Concerns
Standards Doc - Phillips Semiconductor became NXP a few years back; this is the official standards doc for I²C.
I²C primer - The official primer on I²C and related technologies.
Linux Tools for I²C - A nice set of tools for working with I²C and related buses in embedded Linux environments, like pcDuino or Raspberry Pi.
Open Source Hardware Association: A Resolution to Redefine SPI Signal Names
Qwiic Connect System

To use I²C over long distances, check out the dedicated PCA9615 differential I²C bus extender.

Qwiic Differential I2C Bus Extender (PCA9615) Hookup Guide

May 31, 2018

Learn how to extend the range of your I2C communication bus with the Qwiic differential I2C bus extender (PCA9615 ) breakout board.

Or check out our SPI and I2C tutorial with a Raspberry Pi.

Raspberry Pi SPI and I2C Tutorial

October 29, 2015

Learn how to use serial I2C and SPI buses on your Raspberry Pi using the wiringPi I/O library for C/C++ and spidev/smbus for Python.

Need some inspiration for your next project? Check out some of these related tutorials:

Qwiic Human Presence Sensor (AK9753) Hookup Guide

How to get started with your Qwiic enabled AK9753 Human Presence Sensor.

Hookup Guide for the SparkFun RedBoard Artemis

Get started with the RedBoard Artemis - all the functionality of the SparkFun Artemis module wrapped in the familiar Uno R3 footprint

Raspberry Pi 4 Kit Hookup Guide

Guide for hooking up your Raspberry Pi 4 Model B basic, desktop, or hardware starter kit together.

Qwiic Carrier Board Hookup Guide

The Qwiic carrier board is the latest way to rapid prototype with the included M.2 socket to swap processor boards and Qwiic connectors to easily connect I2C devices.

Looking for more inspiration? Check out some of these blog posts for ideas: