Here we are discussing about ADX元45 Accelerometer which is used to measure the acceleration or change in velocity in x, y, and z-axis. There is a sensor like MPU6050 which has both accelerometer and gyroscope and it works as an Inertial Measurement Unit (IMU) to find the orientation, position, and velocity. A gyroscope is used to measure angular velocity that uses the earth’s gravity to determine the orientation of the object in motion.

While Accelerometer can measure linear acceleration, the gyroscope can help find the rotational acceleration. An integrated, patent pending 32-level first in, first out (FIFO) buffer can be used to store data to minimize host processor intervention.We all know about accelerometer and gyroscope, they are primarily used to detect acceleration. These functions can be mapped to one of two interrupt output pins. Free-fall sensing detects if the device is falling. Tap sensing detects single and double taps. Activity and inactivity sensing detect the presence or lack of motion and if the acceleration on any axis exceeds a user-set level. Several special sensing functions are provided.

Its high resolution (4 m g/LSB) enables measurement of inclination changes less than 1.0°. It measures the static acceleration of gravity in tilt-sensing applications, as well as dynamic acceleration resulting from motion or shock.

The ADX元45 is well suited for mobile device applications. Digital output data is formatted as 16-bit twos complement and is accessible through either a SPI (3- or 4-wire) or I 2C digital interface. The ADX元45 is a small, thin, low power, 3-axis accelerometer with high resolution (13-bit) measurement at up to ☑6 g.

Accelerometer adxl345 wire library code