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by brudgers 700 days ago
RFID has some of the significant properties you are looking for. I don't know if it has all of them because I've just about exhausted all my knowledge of RFID and don't know any details of the actual problem you are trying to solve. But RFID is deployed at scale and "everywhere." Probably because the technology doesn't depend on protocols developed for other uses (e.g. IP). Good luck.
1 comments

RFID have small distance yes BT and RFID is ok but wifi im more popular and long working distance