I2C/UART Protocol

I²C (Inter-Integrated Circuit, referred to as I-squared-C, I-two-C, or IIC)is a multimaster serial single-ended computer bus invented by Philips used for attaching low-speed peripherals to a motherboard, embedded system, cellphone, or other electronic device.
Not to be confused with the term Two Wire Interface which only describes a compatble hardware interface.

• More about I2C protocol
• Introduction Video