Custom controller - Only half of the axis motion is detected.

[MelvinPace]

Hello folks! Trying to make a custom KSP controller with arduino, but I've encountered a problem: 

I'm using the Joystick arduino library (the second version) and a potentiometer to control the X axis of the controller. I've checked it on Devices and Printers, in the "controller settings": it works, the dot moves from one side of the square to the other. But when I launch KSP and assign that particular axis to, say, Roll control, the spacecraft starts spinning because the axis motion is wrong.

 

Let's call -1 one of the limit angles of the potentiometer, 1 the other and 0 the center. The expected behaviour is: the spacecraft rolls one way when the potentiometer is at state 1, the other way at -1 and it does not spin at state 0. The actual behaviour is, instead, that it spins one way at state 0, the other way at state 1 and it stops at, say, 0.5 (haven't really defined it, but you get what I mean, at (+limit angle)/2.

I read somewhere that this is because there is some compatibility issue with some controller setup, and although I am myself a Unity developer I haven't really used controllers that much in my games and I admit my ignorance on the topic, so if any of y'all beautiful people can help I'll be happiest to go on with my project