I got it to work! USB mice

[Altainia]

Originally Posted by GuyM142

This would be useful in the coming season!
Correct me if I'm wrong, in order to use an optical mouse to track the robot's position it has to be centered around the rotation axis of the robot, otherwise it will sense rotation in place as a change in the robot's position.

It does not have to be centered around the rotational axis of the robot; it only needs to be straight; facing the same direction as the robot as perfect as you can get it. Its 'X' axis needs to be parallel to the robot's 'X' axis. You can put it in the corner of the robot so long as it lines up with the robot's build direction