Description :

The ADXL345 is a small, thin, ultralow power, 3-axis accelerometer with high resolution (13-bit) measurement at up to ±16 g. Digital output data is formatted as 16-bit twos complement and is acces-sible through either a SPI (3- or 4-wire) or I2C digital interface.

The ADXL345 is well suited for mobile device applications. It measures the static acceleration of gravity in tilt-sensing appli-cations, as well as dynamic acceleration resulting from motion or shock. Its high resolution (3.9 mg/LSB) enables measurement of inclination changes less than 1.0°.

Several special sensing functions are provided. Activity and inactivity sensing detect the presence or lack of motion by comparing the acceleration on any axis with user-set thresholds. Tap sensing detects single and double taps in any direction. Free-fall sensing detects if the device is falling. These functions can be mapped individually to either of two interrupt output pins. An integrated, patent pending memory management system with a 32-level first in, first out (FIFO) buffer can be used to store data to minimize host processor activity and lower overall system power consumption.

Low power modes enable intelligent motion-based power management with threshold sensing and active acceleration measurement at extremely low power dissipation.

Features :

1、Main Chipset: ADXL345

2、Communication: IIC/SPI Communication Protocol

3、Measuring Ranging: ±2g±16g

4、Digital Output: SPI/IIC

5、3-axis, ±2g/±4g/±8g/±16g

6、Compact Accelemotor/Inclinometer

7、Working Voltage: 3V to 5V

8、Working Temperature: -40° to 85°

9、Working Current: 30uA

10、Low Power Consumption

11、Compatible with 51、AVR、Arduino

Example :

More details will be shown step by step in the test file.

Download the Arduino Library for ADXL345 and extract it to your library folder in your Arduino installation. Mine is here: C: Program Files arduino-0021libraries.

Connect this module with Arduino :

Arduino GND -> ADXL345 GND
Arduino 3.3V -> ADXL345 VCC
Arduino A4 (SDA) -> ADXL345 SDA
Arduino A5 (SCL) -> ADXL345 SCL

Here we use Arduino Sensor Shield to make connection very easy.