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UART 125Khz EM4100 RFID Card Key ID Reader Module RDM6300 ...
The Seed Studio 125KHz RFID reader module is designed for reading the codes from 125KHz RFID chips/cards and is compatible with read-only tags and read/write tags.
It could be used in office/home security, personal identification, access control, anti-forgery,...
Mini PN532 NFC RFID Reader/Writer Module – ktechnics
Mini PN532 NFC RFID Reader/Writer Module
The mini NFC shield uses the PN532 chip-set (the most popular NFC chip on the market) and is what is embedded in pretty much every phone or device that does NFC.
This chipset is very powerful, and can pretty much do it all, such as read and write to tags and cards, communicate with phones (say for payment processing),...