I just received my GroveKit with some Screw Terminals and am working on a vending machine project. So far I managed to connect a serial RFID reader using one of the screw terminals and the RPISER port on de GrovePi. Now I want to connect a very simple On/Off keyswitch (and a On/Off button) to the GrovePi. Can I just connect the VCC with the keyswitch and the other end with D1 and use internal pullups? I used to do this on the Pi itself but I am not sure if this works on the GrovePi.