I have the same question. Is it possible, to use an Android phone as an NFC Tag? My idea is, to use the reader as a kind of lock. I simply like to use the phone, present it to the reader and the door should open…especially for the kids. They won’t forget the phone at home before leaving…
Can’t answer the original question, but for this use case I think doing the opposite makes the most sense (and is what I do for my exterior door and garage door). Just put an NFC tag by the door and tap it with your phone to lock/unlock/open/close it. Cheaper, more secure and easier.
Yeah, although that’s kind of the point (from a security standpoint). Only a HA user (for your instance) with the app installed can use the tags for anything.