A smart digital door lock built with STM32 and FreeRTOS, supporting multiple authentication methods including fingerprint recognition, PIN keypad, and SMS-based remote control. The project also includes a Flutter Android application for managing and interacting with the lock.
Digital Lock is an embedded systems project that combines hardware, firmware, and mobile software into a complete access control solution.
The firmware runs on an STM32 microcontroller using FreeRTOS to manage concurrent tasks such as user authentication, display updates, GSM communication, and peripheral control. A Flutter-based Android application provides a convenient interface for monitoring and controlling the system remotely.
| Hardware | Android Client |
|---|---|
 |
 |
Each subproject contains its own documentation with build instructions and implementation details.
The project consists of two main parts:
The firmware is responsible for:
- Managing authentication methods
- Driving the LCD interface
- Communicating with the GSM module
- Processing keypad input
- Interfacing with the fingerprint sensor
- Controlling the locking mechanism
The Flutter application provides:
- Remote interaction with the lock
- Device management
- User-friendly interface
- STM32
- FreeRTOS
- C
- STM32 HAL
- Flutter
- Dart
- Provider
- SQLite
- GSM / SMS
- USART
- I2C
- JSON
- Fingerprint Sensor
- DS1307 RTC
- AT24Cxx EEPROM
- Matrix Keypad
- LCD
- AES
- SHA-256
- GNU Make
- OpenOCD
- ARM GNU Toolchain
- Android Studio
This project is licensed under the MIT License unless stated otherwise.