Control Liftmaster LA400 Gate Opener via HA?

Everyone in this thread, can you please post the EXACT model of your board, and the configuration you are using that works? There is a lot of different boards out there and I’d like to update the main post with solutions that work to save people from reading through all these comments

Also, what is a good name for the Yellow/White wire method?

Myself

  • LA400 Opener
  • Single Gate
  • 001D9040-1CC REV B control board (Circa 2019)

Yellow/White Wire Method did NOT work
Liftmaster K1D8080-1CC Expansion board did NOT work
LiftMaster K1D8387-1CC Expansion board DID Work

Final configuration is LiftMaster K1D8387-1CC Expansion board connected to Ratgdo with this config

And relays set like this on the board

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