The Adafruit LSM303AGR combines a triple-axis accelerometer and triple-axis magnetometer in a single breakout board. The accelerometer measures gravity to determine which way is down, while the magnetometer senses magnetic north — combine the two for a complete compass and orientation solution.

Built on the latest LSM303AGR sensor from ST, this STEMMA QT breakout includes level shifting and voltage regulation for compatibility with both 3.3 V and 5 V systems. Connect via solderless STEMMA QT/Qwiic cables or solder the included header pins for breadboard use.

Key Features

• Triple-Axis Accelerometer – Measures gravity and acceleration for tilt and orientation sensing
• Triple-Axis Magnetometer – Detects magnetic north for digital compass applications
• I2C Interface – Simple two-wire communication with STEMMA QT/Qwiic connectors
• STEMMA QT / Qwiic – Solderless I2C connectors on both sides for easy daisy-chaining
• 3.3 V and 5 V Compatible – Onboard voltage regulator and level shifting
• Arduino & CircuitPython Libraries – Ready-to-use drivers with example code
• Four Mounting Holes – 2.5 mm (0.1") for secure attachment

Ideal For

• Digital compass and heading projects
• Orientation and tilt sensing
• Robotics navigation and waypoint tracking
• Motion-aware wearable electronics

Package Contents

• 1× Adafruit LSM303AGR Accelerometer/Magnetometer Breakout (STEMMA QT, assembled and tested)
• 1× Strip of 0.1" header pins

Resources

• LSM303 Arduino Guide
• LSM303 CircuitPython/Python Guide
• What is STEMMA QT?