I went with an uber-simple solution of a wire running through the roof cavity from the magnetic switch to a big flashing LED in the ceiling by the front door.

I went with an uber-simple solution of a wire running through the roof cavity from the magnetic switch to a big flashing LED in the ceiling by the front door. https://www.michevan.id.au/posts/garage-door-sensor/ https://www.michevan.id.au/posts/garage-door-sensor/ It's worked very well for us. You pretty much can't miss it flashing when you're heading towards the front of the house. I recognise it may not be a good fit for other people though, but sometimes simpler can be betterer.