I2C interface has bidirectional Master- slave communication.The I2C address is fi xed. 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 defi nes the START condition.A change in the state of SDA from low to high while SCL is high defi nes the STOP condition.

I2C Interface is available in following mechanical feature :