Area-Card: Alert-Class "Opening"

[ChristophCaina]

can someone maybe explain, to what devices / entities the alert-class "opening" is linked?

I can select this class on the area card for our living room, where we do have a shutter / cover installed... but since "cover" entities are not binary, it seems not to be related with this device - also, because I have never seen any alarm information being shown.

In addition to that, I have setup another cover device for testing purposes, and can't add the "opening" alarm class to any other card (not even the area, the test device is assigned to)

I would just love to know, what's behind this "opening" alert :)

Thanks!

[karwosts]

All the area card alert classes are binary_sensors. If your menu has an option for Opening, then you have a binary sensor with device_class: opening assigned to that area.

All the device classes are listed here.
https://www.home-assistant.io/integrations/binary_sensor/

[ChristophCaina]

thanks!
Unbeleivable... it was a binary_sensor from a Lightbulb - that comes as "open" by default...
WTF...