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Missing a spirit level at home, I decided to use the Wiimote as a replacement. Over time, this tool evolved to something more like a protractor.

Please put any comments or suggestions on the Talk Page, I'd appreciate the feedback.

Note: If you use C++ and want to use GRRlib for drawing, you might want to have a look at the 'Draw' class (Draw.cpp & Draw.h). This thing kept me sane :-)


Download & extract the archive, and place it in your apps folder on your SD card so the Homebrew Channel can find it.


Put the wiimote on a surface you want to use as a reference and press A. This will start a calibration for minimum and maximum values of your Wiimote, afterwards you can put it on a target surface to see the difference in inclination.




  • Chg: Slightly adjusted maximum value to reduce flickering near 90 degrees.
  • Chg: GRRlib is now responsible for all drawing needs. (Which means: more eye-candy)
  • Add: Raw acceleration values in the debug info text
  • Add: Freeze function on pressing Plus to freeze current values - this is interesting if you cannot see your screen.


  • Chg: Median instead of arithmetic mean is now used to get calibration values, this should increase accuracy.
  • Chg: Message class now handles text drawing
  • Add: Internal info on pressing B in the slider box screen
  • Add: Arc graph showing current tilt


  • Fix: Leftover cursor pixel from previous tests removed
  • Chg: Measuring is done in degrees
  • Chg: Verbosity of calibration screen decreased
  • Add: Detection if Wiimote #1 is up and running
  • Add: Pictures
  • Add: Calibration for maximum value on the Wiimote when standing upright. These things are so unprecise :-/


  • First public release

Credits and thanks

  • Greetings to wiiwillrockyou.de and the users of www.wii-homebrew.com