Review week 25: airlock

This week you built an airlock from the ground up:

• Two doors, one chamber: only the chamber changes its pressure. Dangerous are both doors open, a door against pressure and a vent that keeps running with a door open.
• State instead of sequence: decide anew every tick instead of waiting with sleep.
• Inside and outside pressure: two sensors, the magnitude of the difference with abs, limits as defines. PressureExternal is the target pressure on the room side of the vent.
• Step sequence: close, pump, open, the way back and an abort back into the base. Outputs only from the step.
• Safety: with NaN everything stays shut, each door checks the other, emergency mode stays until acknowledged.
• Controls: buttons with edges, colour on the LED display, announcements with Sound. names.
• Project: lever “Richtung”, pressure decides about the doors, safe on sensor failure.

You pass from 60 %.