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:

RedBoard Turbo Hookup Guide

An introduction to the RedBoard Turbo. Level up your Arduino-skills with the powerful SAMD21 ARM Cortex M0+ processor!

SparkFun Qwiic GPIO Hookup Guide

Add up to 8 extra I/O pins to your microcontroller with the SparkFun Qwiic GPIO. Get started with the Qwiic GPIO in this Hookup Guide.

SparkFun Thing Plus Matter - MGM240P Hookup Guide

Get started with the SparkFun Thing Plus Matter - MGM240P with this Hookup Guide. This guide covers the hardware on this development board along with a quick intro to using the board with Silicon Labs' Simplicity Studio IDE.

How to Play Multiple Buzzers at Once

This tutorial demonstrates the SparkFun Qwiic Buzzer's ability to control multiple buzzers simultaneously by playing a 3-part arrangement of a segment of the Super Mario Bros Theme!

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