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Chamberlain and Liftmaster do this. They’re both owned by Chamberlain group and I believe they are the two most popular brands.

It’s caused tons of headache for people doing home automation stuff, especially since Chamberlain has cut off API access to home assistant. Then the home assistant people figure they’ll just rig a raspberry pi or something to short two wires, but then they hit this encryption nonsense.

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That's nuts!

For what it's worth, I bought this for my old chamberlain. https://gotailwind.com

I was looking into replacing the old unit with a new one with myq but then read about all the problems and decided to give this a shot. 3 years in and it's been a good decision.

Heh, bet you can just short the contacts the button usually closes. Really hard to DRM a button.

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