I²C (Inter-Integrated Circuit) is a multi-master serial bus invented by Philips that is used to attach low-speed peripherals to a motherboard, embedded system, etc.
Hardware Requirement:
I2C bus uses only two lines Serial Data Line (SDA) and Serial Clock (SCL) bidirectional open drain line.
The lines must be externally pulled up with resistors to +5 V or +3.3 V although other higher or lower voltages are also permitted.
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