I also crafted this mini GM interface so that other GMs could remote open/close the airlock when new players needed to cycle in/out. Cycling was not trivial and took about 30 seconds - door 1 would close (sound), the lights would fade, switch, sound effects that were over time more or less audible depending on the virtual air pressure level, another door, but now only heard through the metal of the ship.. you know the usual. Worked well! Just enough buttons!