- First run: If no master UID in EEPROM, the first scanned card becomes MASTER. - After enrollment: Only MASTER unlocks; others are denied. - LCD, LEDs, buzzer give clear feedback. #define LOCK_POS 10 ...

This project presents the design and implementation of a secure RFID-based access control system using Arduino UNO and MFRC522 RFID module. The system grants access only to authorized RFID cards and ...

[Matt] has mixed up a batch of two RFID reading door lock systems. While the “door lock” part of the setup has yet to come into existence, the “RFID reading” section is up and running. By using the ...

I just received my RC522 RFID reader and made this simple Arduino access control system that uses the reader, a buzzer for the alarm and a relay shield for the security system. The relay can be used ...

Abstract: Among the many potential applications of inexpensive radio frequency identification (RFID) technology are security, tracking assets, people monitoring, supply recognition, and access control ...

Abstract: This is an IoT-based system with Radio Frequency Identification System which supports door lock and unlock function. This door locking system helps registered users to lock or unlock the ...