Wire.write(8) // (8dec -> 0000 1000 binary) Bit D3 High for measuring enable.

Wire.write(0x2D) // Access/ talk to POWER_CTL Register – 0x2D.

Wire.beginTransmission(ADX元45) // Start communicating with the device.

Wire.begin() // Initiate the Wire library.

Serial.begin(9600) // Initiate serial communication for printing the results on the Serial monitor.

int ADX元45 = 0x53 // The ADX元45 sensor I2C address.

#include // Wire library – used for I2C communication.

Arduino and ADX元45 Accelerometer Tutorial.

So according to this data and using some trigonometry math, we can calculate the angle at which the sensor is positioned. This means that the outputs of the sensor due to its orientation to gravity can vary from -1g to +1g. If we flip the sensor upside down, then the Z-axis output will be -1 g. On the other hand, the X and Y outputs will be zero, because the gravitational force is perpendicular to these axes and doesn’t affect them at all. So, if we have an accelerometer positioned flat, with its Z-axis pointing upwards, opposite to the gravitational force, the Z-axis output of the sensor will be 1g.

One “g” is the value of the earth gravitational force which is equal to 9.8 meters per second squared. However, accelerometer sensors usually express the measurements in “g” or gravity. The unit of measurement for acceleration is meter per second squared (m/s^2). The earth gravitational force is a typical example of static force, while dynamic forces can be caused by vibrations, movements and so on. This is a 3-axis accelerometer which can measure both static and dynamic forces of acceleration. To begin with, let’s take a look how the ADX元45 sensor works.

Accelerometer adxl345 wire library code