Mouse Jiggler without software you  have to create "fake" mouse movement. It is just enough to register a user in the computer and not to go inactive.

One issue is that the cursor is stuck at the bottom/top of the screen with most methods which I can think of (not sure if it will continue to register use when the cursor is stuck). So I'm not certain that only a small engine will work under the sensor.

I thought I would use a motor to actually move the cursor to the front of the mouse. The best way to do that is not certain.