The I2C or “I squared C” bus is a simple way to transfer data between different integrated circuits, boards or sensors in your Arduino project. I2C stands for “Inter-Integrated Circuit”. One of the great things about I2C is that it only requires two connections to your Arduino, SDA (data) and SCL (clock), and you can easily connect multiple devices to the bus. If you want to learn more about the I2C bus checkout this tutorial from tronixstuff, or this tutorial from How To Mechatronics.
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