Added the final angle sensor that reads the angle of the boom. This sensor is the same as the previous two, except that it's mounted a bit differently and it has no cover.
With this sensor in place it's finally possible to run the excavator without risking to break it. :-)
If I have time later I'll try to read the rest of the positions and angles with encoders for the swing and tracks, and an IMU (BNO055) + GPS for the house.
