Arduino Due and HMC5983L example

The Honeywell HMC5983 is a temperature compensated three-axis integrated circuit magnetometer. This surface-mount, multi-chip module is designed for low-field magnetic sensing for applications such as automotive and personal navigation, vehicle detection, and pointing. The HMC5983 includes our state-of-the-art, high-resolution HMC118X series magnetoresistive sensors plus an ASIC containing amplification, automatic degaussing strap drivers, offset cancellation, and a 12-bit ADC that enables 1° to 2° compass heading accuracy.

The I²C or SPI serial bus allows for easy interface. The HMC5983 utilizes Honeywell’s Anisotropic Magnetoresistive (AMR) technology that provides advantages over other magnetic sensor technologies. Honeywell’s anisotropic, directional sensors excel in linearity, low hysteresis, null output and scale factor stability over temperature, and with very low cross-axis sensitivity. These sensors’ solid-state construction is designed to measure both the direction and the magnitude of magnetic fields, from milli-gauss to 8 gauss. Honeywell’s Magnetic Sensors are among the most sensitive and reliable low-field sensors in the industry

Here is a typical module

Schematic

The layout example shows a 5883L but the 5983L has exactly the same connection

Code

[codesyntax lang=”cpp”]

#include <Wire.h> //I2C Arduino Library
#define addr 0x1E //I2C Address for The HMC5983

void setup()
{
  Serial.begin(9600);
  Wire.begin();
  Wire.beginTransmission(addr); //start talking
  Wire.write(0x02); // Set the Register
  Wire.write(0x00); // Tell the HMC5883 to Continuously Measure
  Wire.endTransmission();
}

void loop()
{
  int x,y,z;
  //Tell the HMC what regist to begin writing data into
  Wire.beginTransmission(addr);
  Wire.write(0x03);
  Wire.endTransmission();
  //Read the data
  Wire.requestFrom(addr, 6);
  if(6<=Wire.available())
  {
    x = Wire.read()<<8; //MSB  x
    x |= Wire.read(); //LSB  x
    z = Wire.read()<<8; //MSB  z
    z |= Wire.read(); //LSB z
    y = Wire.read()<<8; //MSB y
    y |= Wire.read(); //LSB y
  }
  // Show Values
  Serial.print("X Value: ");
  Serial.println(x);
  Serial.print("Y Value: ");
  Serial.println(y);
  Serial.print("Z Value: ");
  Serial.println(z);
  Serial.println();
  delay(500);
}

[/codesyntax]

Output

Open the serial monitor and you should see something like this

X Value: 65463
Y Value: 65436
Z Value: 101

X Value: 38
Y Value: 65407
Z Value: 89

X Value: 65509
Y Value: 65455
Z Value: 135

X Value: 65459
Y Value: 4
Z Value: 106

X Value: 65427
Y Value: 65496
Z Value: 94

Links
GY-282 HMC5983 Replace HMC5883L High-precision High-sensitivity Temperature Compensation Triaxial Compass IIC SPI Module