Is the window open?
I’m sure we’ve all been there - coat on, shoes on, just about to lock the door and - “did i leave the back window open?”
I wanted something which shows me, at a glance, which windows are open, or confirms they’re all closed.
goals
- low maintenance - dont need to charge it every week
- automatically updates in a few seconds
- our windows can be “closed” or “latched closed” (with a ventilation space around), so support both
- easy to glance at - no complex dashboards
- small and unobtrusive.
What i used
- Home Assistant Yellow
- SNZB-04P/PR1 sensors
- 2.6" Hanshow Polaris Pro 280 Electronic Shelf Label
- LilyGo T-Panel S3
- OpenEPaperLink HA integration
Window sensors
I wanted sensors with long battery life. I have a Home Assistant Yellow at home, which has Zigbee support. I already have several Zigbee plugs around the house. Most permanently powered Zigbee devices act as “routers” so there’s a strong network around the house. I decided to buy Sonoff SNZB-04P: