Adafruit 3 axis accelerometer and magnetometer compass board adafruit 1120 p the adafruit 3 axis accelerometer and magnetometer compass breakout board is based around the popular lsm303dlhc which communicates via i2c detect acceleration in all three axes including due to gravity so your project always knows which way is down detect the strength and direction of the local magnetic field which will normally be the earth s there are two programmable interrupts which can be triggered by e