Mikroe GEOMAGNETIC CLICK (Mikroe-2935) – 3-Axis BMM150 Geomagnetic Sensor Board, I²C & SPI, Digital Compass & Magnetic Field Measurement, mikroBUS

The GeoMagnetic Click board requires a single 3.3V DC power supply, provided through the mikroBUS interface. It is not 5V tolerant; applying 5V to the logic pins or power rail may damage the onboard BMM150 sensor and supporting circuitry.

You can communicate with the sensor using either the I2C or SPI digital serial interface, selectable via onboard jumpers or solder pads. The board's mikroBUS pinout provides direct access to both protocol lines, and Mikroe provides a software library with functions for easy configuration and data reading.

Yes, but not directly. This Click board requires a host board with a mikroBUS socket. You would need a corresponding carrier or adapter board (like an Arduino Uno Click Shield or a Raspberry Pi Click Shield) that provides the mikroBUS interface and translates the 3.3V logic levels.

The BMM150 sensor's interrupt engine can be configured to trigger a hardware interrupt pin on the mikroBUS when specific magnetic field conditions are met (e.g., exceeding a threshold). This allows for event-driven, power-efficient designs where the host MCU can sleep until a magnetic event occurs.

The Bosch BMM150 sensor is factory-calibrated and includes on-chip compensation for temperature drift and offset, providing stable data out-of-the-box. For high-accuracy absolute heading applications, a user-level calibration routine (hard/soft iron compensation) is recommended to account for local magnetic distortions in your specific device enclosure.