Inter-Integrate Circuit, aka I2C, is an extremely popular method for connecting one or more peripheral devices, like sensor breakouts, to a host controller, like an Arduino board. It only requires two pins for data and clock and can support attaching over 100 devices. It’s so popular that it even gets its own special, easy to use connector via Adafruit’s STEMMA / STEMMA QT and Sparkfun’s Qwiic. It’s pretty much plug-and-play!
However, it’s not all sunshine, rainbows, and lollipops when dealing with I2C. This guide goes into some of the main hiccups that one may encounter when dealing with I2C devices.
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