GarminDakota20My girlfriend bought a handheld gps with an integrated compass sensor. I was fascinated by watching the virtual pointer turn around (in realtime) depending on the current heading. That was the moment were I was inspired and thought that this could not be that hard and can easily be rebuild.

So I decided to try it by myself. Because I had all the necessary things laying around it was pretty fat forward to get started.

  • Arduino Mega
  • LCD Shield
  • Jumper Wires
  • Compass Module: Just ordered the HMC6352 on a breakout board from sparkfun

First I tried to retrieve data from the HMC6352 module and tried to display it with the LCD shield.

It is a bit tricky to get the heading data from the HMC6352 module, because it is connected to the Arduino via I2C. Therefor it is very important to have the datasheet at hand (and the knowledge how to read and send data wih the arduino via I2C).

How to read and send data via I2C can be found at the Arduino Playground.