Arduino Learning

// Distributed with a free-will license.
// Use it any way you want, profit or free, provided it fits in the licenses of its associated works.
// MMA8452Q
// This code is designed to work with the MMA8452Q_I2CS I2C Mini Module available from ControlEverything.com.
// https://www.controleverything.com/content/Accelorometer?sku=MMA8452Q_I2CS#tabs-0-product_tabset-2
 
#include <Wire.h>
 
// MMA8452Q I2C address is 0x1C(28)
#define Addr 0x1C
 
void setup()
{
  // Initialise I2C communication as MASTER
  Wire.begin();
  // Initialise Serial Communication, set baud rate = 9600
  Serial.begin(9600);
 
  // Start I2C Transmission
  Wire.beginTransmission(Addr);
  // Select control register
  Wire.write(0x2A);
  // StandBy mode
  Wire.write(0x00);
  // Stop I2C Transmission
  Wire.endTransmission();
 
  // Start I2C Transmission
  Wire.beginTransmission(Addr);
  // Select control register
  Wire.write(0x2A);
  // Active mode
  Wire.write(0x01);
  // Stop I2C Transmission
  Wire.endTransmission();
 
  // Start I2C Transmission
  Wire.beginTransmission(Addr);
  // Select control register
  Wire.write(0x0E);
  // Set range to +/- 2g
  Wire.write(0x00);
  // Stop I2C Transmission
  Wire.endTransmission();
  delay(300);
}
 
void loop()
{
  unsigned int data[7];
 
  // Request 7 bytes of data
  Wire.requestFrom(Addr, 7);
 
  // Read 7 bytes of data
  // staus, xAccl lsb, xAccl msb, yAccl lsb, yAccl msb, zAccl lsb, zAccl msb
  if(Wire.available() == 7) 
  {
    data[0] = Wire.read();
    data[1] = Wire.read();
    data[2] = Wire.read();
    data[3] = Wire.read();
    data[4] = Wire.read();
    data[5] = Wire.read();
    data[6] = Wire.read();
  }
 
  // Convert the data to 12-bits
  int xAccl = ((data[1] * 256) + data[2]) / 16;
  if (xAccl > 2047)
  {
    xAccl -= 4096;
  }
 
  int yAccl = ((data[3] * 256) + data[4]) / 16;
  if (yAccl > 2047)
  {
    yAccl -= 4096;
  }
 
  int zAccl = ((data[5] * 256) + data[6]) / 16;
  if (zAccl > 2047)
  {
    zAccl -= 4096;
  }
 
  // Output data to serial monitor
  Serial.print("Acceleration in X-Axis : ");
  Serial.println(xAccl);
  Serial.print("Acceleration in Y-Axis : ");
  Serial.println(yAccl);
  Serial.print("Acceleration in Z-Axis : ");
  Serial.println(zAccl);
  delay(500);
}