jeffeb3 on Nostr: The HA app can write a url to the nfc tag. The url points back to the app. The app ...

The HA app can write a url to the nfc tag. The url points back to the app. The app can then connect to your home assistant server and tell it that the tag was scanned.

Then home assistant can do anything home assistant knows how to do. You can toggle lights, start an automation, open your blinds, send a notification, play a song or TTS, whatever.