MicroView Digital Compass
Contributors:
AGlass0fMilk
AGlass0fMilk 
Resources and Going Further
There are a many more cool projects you can make with the MAG3110 sensor. If you combine the MAG3110 with a few other sensors, you can make a variety of projects that involve location and orientation sensing.
Check out Shawn Hymel's Adventues in Science: Using a Magnetometer as a Compass and example code for ideas:
For more sensor fun, check out these other great SparkFun tutorials:
SparkFun Inventor's Kit for Photon Experiment Guide
Dive into the world of the Internet of Things with the SparkFun Inventor's Kit for Photon.
Experiment Guide for the Johnny-Five Inventor's Kit
Use the Tessel 2 and the Johnny Five Inventors kit to explore the world of JavaScript enabled hardware through 14 awesome experiments!
Qwiic 6DoF (LSM6DSO) Breakout Hookup Guide
A hookup guide for the Qwiic 6DoF (LSM6DSO), which features a 3-axis accelerometer, 3-axis gyroscope, temperature sensor, and FIFO buffer.