Glossary Term:
Inter-Integrated Circuit

I2C, pronounced I-squared-C, is a serial bus the provides communication between sensors and microcontrollers such as the Arduino. In contrast to the full-duplex SPI specification, I2C has a slower data rate and data can only travel in one direction at a time. Arduino uses 7-bit values to reference I2C addresses, and devices using I2C must use a common ground to communicate.

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