Open any Doorhan barrier

Sub-GHz
#1

I’m trying to use the FZ to operate a bunch of Doorhan town barriers. After some surfing, I’ve found out that Doorhan systems:

  • generally use 433.9 MHz, AM, 24bit protocol
  • have rolling-code (Keeloq?) protection

Searching similar topics on this forum, I’ve found recommendations for some other manufacturers to ‘install the manufacturer key’ on the Flipper and then use it to send signals. Could anyone please explain to me how that would work and (if possible) share the ‘open sesame’ for Doorhan barriers?

Thx!

#2

When I hear Open sesame I think of the de Bruijn sequence. I don’t believe that can work in this case. That only works on poorly designed systems. It would not work on any rolling code system I am aware of.

Each gate would have it’s own seed and counter value unless all these gates work with a single remote.

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