XCA (Auxiliary clock line): Responsible for the Auxiliary I2C communication ![]() ![]() SDA (Serial data line): Responsible for the primary I2C communication SCL (Serial clock line): Responsible for the primary I2C communication The GY-521 breakout board has a total of 8 pins which are as follows: The DMP unit is responsible for combining the raw data and performing some calculations to remove the errors in each sensor. The chip also includes a 16-bit analog to digital converter on each channel and a DMP (Digital Motion Processor) unit. This makes it a 6 DOF IMU (6 degrees of freedom inertial measurement unit). The GY-521 has an InvenSense MPU6050 chip which contains a 3-axis accelerometer and a 3-axis gyro meter. In this article, we are going to interface the GY-521 accelerometer with Arduino.
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