JoyC missing documentation

[sirtet]

I miss some descriptions and/or a schematic, to understand details of JoyC:

1. Which pins from the StickC are used by the JoyC, which are available for other purposes?
   (I guess only 2 pins are used for SDA/SCL, so one should be available)

2. Also, i wonder what the Battery on JoyC does. Does it power the stick, or does it only drive the JoyC?

3. What is the switch doing?
   I can see that the led's are turned on and off, but does it also have other effects?

[kuriko]

@sirtet

1. I think there is a switch pin in addition to SDA and SCL (the joystick is pressed or not)

2. The battery can power the Stick, and StickC and StickCPlus can read the battery voltage, but StickCPlus2 cannot

3. I personally adopt that the switch could just powering the LEDs...or STM32 on JoyC?