Roll Up Garage Door LFM-20 Hack with SmartThings

Just a heads up if you do a similar “hack” with your door controller. I found the door control "dead’ yesterday as for whatever reason (likely some SmartThings strangeness) the LFM20 relay was left “ON”. This drained the CR2032 lithium cell in the wireless keypad. The relay is programmed as a momentary switch, so should never be on for for more than a few seconds.

I’ve since added a rule using Rule Machine to ensure that this relay is never on for more than 10 seconds, and will get a notification if for some reason this happens again.

Larry, your app has been working great: New smart app to link the virtual/simulated garage door device with two actual devices

1 Like