Support sabre

[Yohannfra]

Issue tracker for sabre support

[lmilekic]

I'd be interested in helping add sabre support. What's the core issue that is stopping touche from supporting sabre currently?

[Yohannfra]

The limitation comes from how the capacitive touch library works.
It mesure the capacitance by measuring the time needed to detect the voltage change from two pins (see : https://playground.arduino.cc/Main/CapacitiveSensor/).

For epee it just needs to read this value when the button is pressed but for foil and sabre it needs to keep reading this value all the time until it detects the touch, but since this takes a lot of time to do a read, it will slow down the whole system + the values won't be accurate.

I think this is not solvable with the arduino nano so these days I try to use the internal capacitive sensor of the ESP32 and if it doesn't work I'll try with a STM32 (It's used inside the Favero system).