(TEMP) notes

"big questions":

• ask a fireman whether a door should be open or closed during a blackout
  • It probably isn't possible to open a lock when there is no power anyway.
• Add FORCE_OPEN (specific/all doors) to the protocol? In case of emergency without blackout?

implementation notes:

• controller:
  • reference/documentation:
    • STM32CubeF4
    • Networking stack