Teensy 4.0 + CMPS12 compass
It is pretty essential to have a tilt-compensated compass module on a boat that heels. The CMPS12 compass is an example that met this requirement. Compared to the CMPS11, the input voltage can now be 3.3v. The module adds a Bosch BNO055 processor to remove errors caused by tilting the module. The CMPS12 also introduced automatic calibration. Automatic calibration might sound like an improvement, but my experience was that I had to turn the compass through 360 degrees before getting good readings each time I turn it on. It looks like a dance when I do this next to ponds with the compass inside a boat.
Connections
Description | Colour | Teensy 4.0 | CMPS12 compass |
---|---|---|---|
Power 3v | Orange | 3.3v | 3.6v - 5v |
Ground | Black | GND | GND |
i2c Data | White | 20 | Second from top |
i2c Clock | Blue | 21 | Third from top |
Video
Please click thumbnail image to start the video