The problem is these cards are commodity items so they ALL will talk to the same challenge query from HID brand readers. So a thief get’s a HID reader, hacks it and now you have everything you need.

By connecting multiple MFRC522 RFID readers to an Arduino Uno, ... To increase the possible distance between card & reader, we ended up with RFID-readers that were a litte more expensive but have ...

Each programmed card has an allocated 5v/TTL compatible output and an Indicator LED. There is a latching mode, and a momentary mode. This unit can program 6x RFID cards in less than 30 seconds!

Instructables user talk2bruce created the Arduino Internet Gizmo, a card reader that takes you to your favorite websites with a touch of an RFID tag.

The card reader can be used two further enhance both Arduino and Raspberry Pi projects and is now available from just C$21 or roughly £13 with worldwide delivery expected to take place during ...