I2C interface has bidirectional Master- slave communication. The I2C address is fixed. It is “0x36” or “0110110”. With I²C interface, sensor acts as slave and microcontroller is the master.

The SDA signal is the bidirectional data line. The SCL signal is the clock generated by the I²C bus master to synchronize sampling data from SDA. The maximum SCL frequency is 1 MHz. Data is sampled on the rising edge of SCL. A change in the state of SDA from high to low while SCL is high defines the START condition. A change in the state of SDA from low to high while SCL is high defines the STOP condition.

I2C Interface is available in following mechanical feature :