Weekly Embedded Systems Challenge: Build a Smart Door Lock with an RFID Module
Objective:
Design and implement a smart door lock system using an RFID module (e.g., RC522), a microcontroller (Arduino, ESP32, or STM32), and a servo motor or solenoid lock. The system should authenticate users via RFID tags and unlock the door for authorized users.
Core Challenge:
- Read RFID Tags: Use an RFID module to read tag IDs.
- Authentication System: Store a list of authorized RFID tag IDs in the microcontroller.
- Lock Mechanism: If an authorized tag is detected, trigger a servo motor or solenoid lock to unlock the door for a few seconds.
- Feedback System: Use an LED or buzzer to indicate authentication success or failure.
- Power Optimization: Implement sleep modes to conserve power if using a battery-powered setup.
Extra Credit:
🔹 Add an OLED Display: Show messages like “Access Granted” or “Access Denied”.
🔹 Web or App Integration: Connect to Wi-Fi (ESP32) and allow remote unlocking via a web interface.
🔹 Multiple User Management: Implement an admin mode to add or remove RFID tags dynamically.
🔹 Security Features: Add a failed attempt counter and lockout period after multiple incorrect scans.
🔹 Data Logging: Store access logs on an SD card or send them to a cloud service.
Submission & Sharing:
📸 Share photos/videos of your working prototype.
📜 Document your process—code, wiring diagram, and challenges faced.
📢 Discuss with the community: How would you enhance security in real-world applications?
🚀 Ready to level up your embedded systems skills? Let’s build! 💡🔧