t-y
FYI the chip in them is something like the popular NXP PN7150 which is like $3.
https://www.lcsc.com/mobile/product-detail/RFID-ICs_NXP-Semicon-PN7150B0HN-C11002E_C513804.html
I make my own NFC readers.
Plenty of examples on GitHub too, like https://github.com/sbc-fish/NFC-Hat
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