In brief: ESP32 hub · fingerprint + RFID badges · monitoring of door/window sensors · status screen · light feedback · in daily use at my home for 5 years.
I designed this system to secure access to my home — not a single standalone door-opening module, but a complete hub: fingerprint identification for me, RFID badges for authorized people, and monitoring of many sensors spread across the doors and windows to detect abnormal situations.
The hardest part: handling a large number of inputs/outputs on a single ESP32. The system reads multiple sensors, manages the identification readers, drives the light feedback, displays information and reacts quickly to state changes.
This forced me to optimize the firmware architecture and the GPIO layout to achieve stable operation, with no random behavior — the key issue for a security system used every day.
User identification (fingerprint + RFID) · secure unlocking · door/window sensors · status screen · illuminated buttons and visual feedback · authorization logic · custom enclosure and front panel.
A complete access system, multi-user and multi-method, stable and legible day to day despite the number of elements managed by a single microcontroller.