I2C
Contributors:
SFUptownMaker
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.
- 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.
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:
Transparent Graphical OLED Breakout Hookup Guide
The future is here! Our Qwiic Transparent Graphical OLED Breakout allows you to display custom images on a transparent screen using either I2C or SPI connections.
Three Quick Tips About Using U.FL
Quick tips regarding how to connect, protect, and disconnect U.FL connectors.
Qwiic Twist Hookup Guide
Take your volume knob beyond 11 with the Qwiic Twist digital RGB LED encoder via I2C!
Assembly Guide for SparkFun JetBot AI Kit
Assembly Guide for the SparkFun JetBot AI Kit. This tutorial includes photos & comments to assemble the two-layer chassis & additional components unique to the JetBot kit.
Looking for more inspiration? Check out some of these blog posts for ideas: