Fingerprint based Bank Locker System using RFID

This paper presents the development and implementation of a microcontroller-based smart locker security system that integrates RFID and fingerprint biometric technologies to ensure secure and controlled access. The system utilizes an RFID module for administrative override and a fingerprint sensor for user authentication, combined with a servo motor to control the physical locking mechanism. An I2C LCD provides real-time feedback to users, and a buzzer offers audio alerts for system events. The built-in EEPROM of the Arduino Uno is used to store authorized fingerprint IDs, ensuring data persistence across power cycles. A button-controlled menu system allows administrators to enroll, delete, or reset fingerprint data upon successful RFID verification. Security features include a lockout mechanism after multiple failed attempts and an RFID-based recovery system for system reset. The proposed design is low-cost, scalable, and suitable for applications in banking, educational institutions, and personal security lockers. Experimental validation demonstrates high reliability and fast response time, making it a practical solution for secure access management.