Do you have extra Wiimotes lying around and you want to build one of the most accurate level tools ever using it?
Well, here’s a DIY site that explains how to make a level tool using a Wiimote in detail. Definitely check it out if you got some spare time and future additions for home improvements.
Put the wiimote on a surface you want to use as a reference and press A.
This will start a calibration, and afterwards you can put it on a target surface to see its difference in inclination.