T5577 rewritable RFID card

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Atmel/Microchip T5557 cards are low frequency 125KHz read/writable RFID credentials which can be programmed to emulate many popular access control system cards.  The T5577 chip is capable emulating the following access control credential cards:

  • HID Prox
  • Indala Flexpass
  • Kantech ioProx
  • Swatch EM41xx
  • Applied Wireless AWID
  • Jablotron
  • Farpointe Data Systems
  • Honeywell NexWatch
  • Noralsy
  • eTag SecuraKey
  • Nedap
  • Viking
  • Presco
  • VISA2000

... and more.  Most field teams opt to interact with these credentials using a tool such as the Proxmark3, but it is also possible to program and configure T5577 cards with smaller tools like the Flipper Zero, Blue Cloner Gun, etc.