(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:
  • hw:
    • do we have a good RNG?
    • should we align network-transmitted stuff to 4B?
  • protocol:
    • @body checksum: I think that a cryptographic hash is not necessary, so we can go with e.g. CRC32, BUT: ask sb smart!
    • Server MUST do something when a controller reports HW failure (like reader disconnected from controller...).
      • Should the MSB of "LOGS" type serve as a "critical" flag?