RFID Door Access

Reverse Engineering current system

The system currently installed is built by ACT and uses 125kHz keyfobs, but is not compatible with standard cheap chinese ones.

• ActPro 100e Door control system -  Installation manual
• ActPro 1040e Proximity Reader
• "ACTProx cards and fobs supported"
• "HID cards and fobs supported"
• HID Corporation App Note -  Clock & Data Output format
• From sampling the data lines it is definitely not Wiegand format
• Possible compatible fobs £1.60

It should be possible to build a microcontroller system that listens to the clock+data signal from the card reader and pulls the 'door release' line low when one of our own keyfobs is detected.

Attempts to reverse engineer what was there have given this:

• clockanddata_debugger.ino - Arduino sketch of the logging software
• Results of reading two keyfobs, two times each. keydata.txt