I need a setup that informs me if my house windows are open. Could you please help me organising that?
Obviously I have to put 1 wifi sensor on each window. Any suggestion? Which ones have good compatibility?
I want to know if windows are open but not for the whole day, only some times I want, so I need a switch to activate or deactivate notifications on OH.
Thank you!
What technologies are you already using for home automation?
I do not think you could provide is with any less information and expect a coherent answer.
How to ask a good question / Help Us Help You - Tutorials & Examples - openHAB Community
Look especially at 1 through 4, 9, 10, and 14.
sonoff rf bridge + 2way contacts
contacts:
sonoff google yourself, flash with tasmota a connect to the OH for example as here
then create rules which will do what you want to achieve.
As your post is too shallow, this is more than enough informations you really need now 