I've got an Arduino that interfaces with several hardware modules - e.g. MCP interfacing with buttons, lights etc. Does the FSUIPC GUI interface with such modules - free or paid version? If it's via the serial port - I assume there's a protocol and I've got to implement the protocol on the Arduino. i.e. listen for commands from FSUIPC - turn on an LED or send commands to FSUIPC - user rotated a knob. If the GUI doesn't - then I guess I have to write a client module that inter