Quelltext der Seite WSAL24657 – BMM150 3-Axis Magnetometer Sensor/en

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'''Documentation notice:''' This technical documentation was independently rewritten from an archived supplier source. Check technical details and commands against the product version and manufacturer documentation before use.

== Summary ==
Concise technical introduction to the Waveshare BMM150 magnetometer module, covering specifications, interfaces, and example integrations for Raspberry Pi, Arduino, ESP32, and Pico.

== Related products at JW Tech ==
* [https://shop.jw-tech.eu/p/WSAL24657 WSAL24657 – BMM150 3-axis Magnetometer Sensor, Digital Compass Sensor, Magnetic Field Measurement]

== Technical overview ==
* The BMM150 is a 3-axis magnetometer with I2C (default) and SPI interfaces.
* Operating voltage: 3.3 V or 5 V; the module includes an onboard voltage translator.
* Resolution 0.3 μT; measurement range ±1300 μT (X/Y), ±2500 μT (Z).
* Data rate in normal mode: 10 Hz.
* Default I2C address 0x13; changeable via A0/A1 pads (addresses 0x10–0x13 depending on pad settings).
* SPI mode is enabled by re-soldering the mode-selection pads in the upper-left corner.
* Example code for Raspberry Pi, Arduino, ESP32, and Pico is available as a ZIP download.
* For Arduino/ESP32 demos, set the USE_I2C macro definition to 1 for I2C or 0 for SPI.

'''Commands and examples – verify before use:''' 
<syntaxhighlight lang="text">
sudo apt-get install wiringpi
wget https://project-downloads.drogon.net/wiringpi-latest.deb && sudo dpkg -i wiringpi-latest.deb
gpio -v
sudo raspi-config
sudo reboot
ls /dev/spi*
sudo apt-get update && sudo apt-get unzip
wget https://files.waveshare.com/upload/6/67/BMM150_3-Axis_Magnetometer_Sensor_code.zip && unzip BMM150_3-Axis_Magnetometer_Sensor_code.zip
cd BMM150_3-Axis_Magnetometer_Sensor_code/RaspberryPi/I2C && make clean && make && sudo ./bmm150
cd BMM150_3-Axis_Magnetometer_Sensor_code/RaspberryPi/SPI && make clean && make && sudo ./bmm150
cd RaspberryPi/python && sudo python get_geomagnetic_data.py
i2cdetect -y 1
</syntaxhighlight>

== Notes and version constraints ==
* The exact I2C address depends on the A0/A1 pads; verify the correct address before testing.
* Switching to SPI requires soldering the pads – this step needs soldering access.
* Raspberry Pi 4B may require an updated wiringPi; version 2.52 is expected.
* MicroPython firmware installation on Pico can be done offline if network issues occur.
* If data does not display correctly: check wiring, communication method, and device address.

== Source and revision record ==
* [https://www.waveshare.com/wiki/BMM150_3-Axis_Magnetometer_Sensor BMM150 3-Axis Magnetometer Sensor - Waveshare Wiki]
* Source revision: 99688
* Captured: 2026-09-05T02:35:35+00:00
* SHA-256: <code>7148c23dc1b7700ae314d0eac957aa3018ac7e73f959b03e3c5967b77346c6d6</code>