but the communication MUST be possible even if we interchange the connections.
Does that mean any pin can be connected to any pin? If that's true, is it a must that both Arduinos run the same sketch, so they are interchangeable too?
but the communication MUST be possible even if we interchange the connections.
Does that mean any pin can be connected to any pin? If that's true, is it a must that both Arduinos run the same sketch, so they are interchangeable too?