Turns out that my garage door opener (a Chamberlain HD220) is too new and fancy to work with a general door opener like this one. This Z-Wave opener has a relay that goes in parallel with the wall button and pulses it to simulate a button press. The button on the wall that came with the Chamberlain unit is actually more than just a contact -- there's a whole printed circuit board behind it and presumably it sends some sort of serial command when you press it.
A poor quality picture of the board behind my wall button. Note the clicky switch SW2 on the left. |
Even though the wall button isn't just a button, there is a button on it (SW2 above). The relay in the Z-Wave unit just has to go in parallel with that button. It wasn't too pretty, but I soldered on a hobby JST connector (not the ideal wire because of its size and many strands, but it works) so that I could do a longer wire run to the Z-Wave unit which is next to the physical garage door opener.
The button board with JST pigtail connector. |
Close-up of the switch and solder-job. I'm not proud. |
I got the idea from this forum post. Note that this should work on Liftmaster, Chamberlain, and Craftsman garage door openers that have smart buttons.
good writeup, worked perfectly for my setup!
ReplyDelete