I2C Protocol

Inter-Integrated Circuit — a low-speed synchronous serial communication protocol using two wires (SDA data, SCL clock). I2C supports multiple devices on the same bus with up to 128 addresses. In robotics, I2C connects low-bandwidth sensors (temperature, pressure, IMU, LCD) to microcontrollers. Not suitable for real-time motor control due to low speed (100kHz–3.4MHz).