SmartHomePrimer:
2 feet tall
Yeah. There are some taller 4-beam sensors out there. They also seem to have Chinee-generic availability. But the ABT-100 seems to have been around longer.
Here's the rest of my kit
https://www.amazon.com/gp/product/B011BJZNGO/
and
After looking, unsuccessfully, for an off-the-shelf Zigbee device that would sense and report the state of mechanical contacts---relay contacts, simple pushbuttons, etc. I decided to make my own from a Visonic MCT-340 E. It's a "supported,'" relatively low cost magnet sensor used for doors, windows and the like. 'Turns out it is also quite easy to hack. (See photos.)
[sensor%20hack%20small]
[sensor%20hack%20PCB%20Small]
Remove the battery cover.
Pry off the rest of the rear cover. (Use a …
