RFID Door Lock using ESP32

RFID (Radio Frequency Identification) provides keyless access using cards or tags. An RFID Door Lock replaces traditional keys with RFID cards - common in offices, hotels, and increasingly in homes. Add IoT to log access times.

Why This Project Is Popular

RFID access control is everywhere - office buildings, metro stations, attendance systems. This project teaches RFID technology, security concepts, and motor control. The combination with IoT (logging who entered when) adds modern features.

Project Ideas or Guide

Build a complete access system:

• RFID Reader: Use RC522 module to read UID from RFID cards/tags.
• Card Database: Store authorized UIDs in ESP32 memory or Firebase.
• Solenoid Lock: 12V electric lock opens on authorized card.
• Access Logging: Log each access attempt (authorized/denied) to Firebase.
• Multiple Cards: Register multiple family members with different permissions.
• Admin Panel: Web interface to add/remove cards.

Components Used

• ESP32
• RC522 RFID Reader
• RFID Cards/Tags
• 12V Solenoid Lock
• Relay Module
• Power Supply (12V)
• Buzzer/LED for feedback

FAQ

Q: How many cards can I register?

A: ESP32 flash can store thousands of card UIDs.

Q: Is RFID secure?

A: Basic RFID is not cryptographically secure; for high security use NFC or BLE.