The 7Semi BMM150 is a high-performance digital geomagnetic sensor based on Bosch’s BMM150 IC. Designed for precise 3-axis magnetic field sensing, this ultra-compact breakout board supports both I2C and SPI interfaces and is perfect for embedded orientation detection, electronic compassing, and wearable devices. The module includes onboard level shifting and power regulation, making it compatible with 3.3V and 5V systems.
Features

3-axis digital geomagnetic sensor

Based onBosch BMM150

Ultra-small, low-profile PCB for easy integration

Dual interface support:I2C and SPI

Onboard level shifters for 3.3V/5V logic compatibility

High accuracy magnetic field detection

Suitable for low-power wearable and mobile applications

Applications

Electronic compass and tilt-compensated heading

Augmented reality (AR) orientation

Indoor navigation and localization

Wearable health and fitness devices

Motion tracking in robotics and drones

Gaming controllers and 3D input devices

What is Included?

1 x 7Semi BMM150 Digital Magnetometer Sensor Board

Frequently Asked Questions (FAQs)
Q1: Can I use this with Arduino or Raspberry Pi?
A:Yes, the BMM150 breakout board works with both. Libraries are available for Arduino, and it can be used with Raspberry Pi via I2C or SPI.
Q2: What is the default communication mode?
A:The board is set to I2C mode by default. You can switch to SPI by adjusting the PS pin.
Q3: Is it Qwiic compatible?
A:No, it not supports Qwiic connectivity for easy integration into modular embedded systems.
Q4: Whats the maximum I2C clock speed supported?
A:The I2C interface supports up to 1 MHz fast mode operation.
Q5: Can it be used to calculate compass heading?
A:Yes, with proper calibration, the BMM150 can provide heading data for use in digital compass applications.
Resources

BMM150 Datasheet (PDF)