-112 pressure

[TheSandBoxMKG]

I think it has to do something at hardware level, but my tablet is always returning a pressure of -112, it means that is touching the drawing area but it never detects the actual pressure and so it's impossible to use it other than the keys.

It was actually working a few days ago, today it stopped work and I've checked the pressure that it was decoding by inserting an std::cout << decoder.get_pressure() << "\n"; in where it starts to send the positions and the pressure.

Sometimes it rarely sends any other pressure than -112 and even then it's erratic.

Do you know what's could been wrong?