- How many buzzers should a hub connect to?
- Which microcontroller
- Which battery
- Which communication
One extensible way of doing it is for the hubs to have some form of language for defining a lesson. E.g simple statements like.
Wait 10 secs Listen for button response Listen for server response Send button press to server If button 4 pressed last light green led and sound buzzer
Obviously this would be in opcode fashion to save space.