I was looking for ways to do finite state machines in Arduino code. Forgive me here C and C++ programmers, for I do not dwell within your hallowed halls.

The build uses state machines to keep track of the moves played on each of the squares, and another state machine to keep track of whether or not the current game has been won.

For small systems (like an Arduino) you might want something a lot simpler. Object Oriented State Machine Operating System (OOSMOS) is a single-file and highly portable operating system, and it ...