🚗 Smart Parking System with ESP32 & FreeRTOS

A real-time multitasking smart parking management system built with ESP32, FreeRTOS, and IoT technologies. Features web dashboard, Telegram bot control, environmental monitoring, and barrier gate automation.

📋 Features

• Real-Time Parking Management: Track available slots with IR sensors
• Automatic Barrier Control: Servo-controlled gate with entry/exit detection
• Web Dashboard: Beautiful responsive UI with live updates
• Telegram Bot: Remote monitoring via Telegram commands
• Environmental Monitoring: Temperature & humidity tracking (DHT22)
• Dual-Core Processing: Hardware tasks on Core 0, Communication on Core 1
• 8 Concurrent FreeRTOS Tasks: Efficient multitasking architecture

🏗️ System Architecture

┌─────────────────────────────────────────────────────────────┐
│                      ESP32 Dual Core                        │
├─────────────────────────────┬───────────────────────────────┤
│         Core 0              │           Core 1              │
│     (Hardware Tasks)        │    (Communication Tasks)      │
├─────────────────────────────┼───────────────────────────────┤
│  • Sensor Task (Priority 3) │  • LCD Task (Priority 1)      │
│  • Gate Task (Priority 2)   │  • Web Server Task (Priority 1)│
│  • LED Task (Priority 1)    │  • Telegram Task (Priority 1) │
│  • DHT Task (Priority 1)    │  • WiFi Task (Priority 1)     │
└─────────────────────────────┴───────────────────────────────┘

🔧 Hardware Components

Component	Quantity	GPIO Pin	Description
ESP32 DevKit	1	-	Main microcontroller
IR Sensor (Entry)	1	GPIO 18	Detects incoming cars
IR Sensor (Exit)	1	GPIO 19	Detects outgoing cars
Servo Motor (SG90)	1	GPIO 25	Controls barrier gate
Green LED	1	GPIO 26	Indicates available slots
Red LED	1	GPIO 27	Indicates parking full
DHT22 Sensor	1	GPIO 4	Temperature & humidity
LCD I2C (16x2)	1	GPIO 21, 22	Status display

📊 Wiring Diagram

ESP32 Connections:
─────────────────
GPIO 18  ──────── IR Entry Sensor (OUT)
GPIO 19  ──────── IR Exit Sensor (OUT)
GPIO 25  ──────── Servo Signal (Orange)
GPIO 26  ──────── Green LED (+)
GPIO 27  ──────── Red LED (+)
GPIO 4   ──────── DHT22 Data
GPIO 21  ──────── LCD SDA
GPIO 22  ──────── LCD SCL
3.3V     ──────── Sensors VCC
5V       ──────── Servo VCC, LCD VCC
GND      ──────── Common Ground

🚀 Getting Started

Prerequisites

• PlatformIO or Arduino IDE
• ESP32 Board Package
• Required Libraries (see platformio.ini)

Installation

1. Clone the repository

   git clone https://github.com/YOUR_USERNAME/smart-parking-esp32.git
   cd smart-parking-esp32

2. Configure WiFi & Telegram

   Edit include/config.h:

   #define WIFI_SSID "your_wifi_ssid"
   #define WIFI_PASSWORD "your_wifi_password"
   #define BOT_TOKEN "your_telegram_bot_token"

3. Upload to ESP32

   # Using PlatformIO
   pio run --target upload
   
   # Or use Arduino IDE

4. Access the Dashboard

   • Open Serial Monitor to get the IP address
   • Navigate to http://[ESP32_IP] in your browser

📱 Telegram Commands

Command	Description
/start	Show available commands
/status	Get current parking status
/time	Get current date & time
/temp	Get temperature & humidity
/all	Get complete system info

🖥️ Web Dashboard

The web dashboard provides real-time monitoring with:

• Available/Occupied slots counter
• Gate status indicator
• Temperature & humidity readings
• WiFi & Internet connection status
• System uptime

📁 Project Structure

smart-parking-esp32/
├── README.md           # This file
├── platformio.ini      # PlatformIO configuration
├── src/
│   └── main.cpp        # Main application code
├── include/
│   └── config.h        # Configuration settings
└── docs/
    └── wiring-diagram.md

🔄 FreeRTOS Components Used

• Tasks: 8 concurrent tasks with priority-based scheduling
• Queues: Event-driven communication (entry, exit, LCD)
• Mutexes: Thread-safe access to shared resources
• Dual-Core: Task pinning for optimal performance

🛠️ Dependencies

lib_deps = 
    ESP32Servo
    LiquidCrystal_I2C
    DHT sensor library
    ArduinoJson
    UniversalTelegramBot

📈 Future Improvements

• Add RFID/NFC for authorized access
• Implement mobile app
• Add camera integration for plate recognition
• Cloud logging with Firebase/AWS
• Multiple parking zones support

👨‍💻 Author

** Joox** - ** Ahmed **

• IoT & AI Developer @ VoltX
• CS Student @ Helwan University

📄 License

This project is licensed under the MIT License - see the LICENSE file for details.

🙏 Acknowledgments

• Helwan University - Faculty of Computers and Information Technology
• FreeRTOS community
• ESP32 Arduino community

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