Car Parking System Using Arduino

An automated car parking management system built with Arduino that monitors parking slots, controls entry/exit barriers, and displays real-time availability on an LCD screen.

Features

• Real-time Slot Monitoring: Tracks 3 parking slots using IR sensors
• Automated Barrier Control: Servo motor-controlled entry/exit gate
• LCD Display: Shows available slots and individual slot status
• Smart Entry/Exit Logic: Prevents entry when parking is full
• Slot Counter: Automatically updates available parking spaces

Hardware Components

• Arduino Board (Uno/Nano recommended)
• Servo Motor - Controls the parking barrier
• LCD Display (16x2) with I2C module (Address: 0x27 or 0x3F)
• 5x IR Sensors:
  • 1x Entry sensor
  • 1x Exit sensor
  • 3x Parking slot sensors
• Jumper wires and Breadboard
• Power Supply (5V)

Pin Configuration

Component	Arduino Pin
Entry IR Sensor	Pin 2
Exit IR Sensor	Pin 3
Servo Motor	Pin 4
Slot 1 IR Sensor	Pin 5
Slot 2 IR Sensor	Pin 6
Slot 3 IR Sensor	Pin 7
LCD (I2C)	SDA & SCL

Circuit Diagram

Arduino
├── Pin 2  → IR Entry Sensor
├── Pin 3  → IR Exit Sensor
├── Pin 4  → Servo Motor (Signal)
├── Pin 5  → IR Slot 1 Sensor
├── Pin 6  → IR Slot 2 Sensor
├── Pin 7  → IR Slot 3 Sensor
├── SDA    → LCD I2C (SDA)
└── SCL    → LCD I2C (SCL)

Wiring Diagram (Photo)

If the image does not render, ensure the photo file is saved at docs/wiring-diagram.png in this repository.

Required Libraries

Install the following libraries via Arduino IDE Library Manager:

• Servo.h - Built-in Arduino library
• Wire.h - Built-in Arduino library
• LiquidCrystal_I2C.h - Download here

Installation

1. Clone this repository:

   git clone https://github.com/YousefElbilkasy/Parking-System-Using-Arduino.git

2. Open Parking.ino in Arduino IDE

3. Install required libraries (see above)

4. Connect your Arduino board via USB

5. Select the correct board and port:

   • Tools → Board → Arduino Uno (or your board)
   • Tools → Port → (select your COM port)

6. Upload the code to your Arduino

How It Works

System Logic

1. Initialization:

   • System boots with welcome message
   • Reads initial slot occupancy
   • Sets barrier to closed position (97°)

2. Entry Process:

   • Car approaches entry sensor
   • If slots available: barrier opens (7°), counter decreases
   • If parking full: displays "Sorry Parking Full"

3. Exit Process:

   • Car approaches exit sensor
   • Barrier opens (7°), counter increases
   • Barrier closes after car passes

4. Slot Monitoring:

   • Continuously monitors all 3 parking slots
   • Updates LCD display in real-time
   • Shows "F" (Full) or "E" (Empty) for each slot

LCD Display Format

Line 1: Have Slots: X
Line 2: S1:E S2:F S3:E

• X = Number of available slots (0-3)
• E = Empty slot
• F = Full slot

Customization

Change Total Slots

int slot = 3;  // Modify this value (line 23)

Adjust Servo Angles

myservo.write(97);  // Closed position
myservo.write(7);   // Open position

LCD I2C Address

If your LCD doesn't display anything, try changing the address:

LiquidCrystal_I2C lcd(0x3F, 16, 2);  // Try 0x3F instead of 0x27

Troubleshooting

Issue	Solution
LCD shows nothing	Check I2C address (0x27 or 0x3F), verify connections
Servo not moving	Check power supply, verify pin connection (Pin 4)
Wrong slot count	Verify IR sensor placement and wiring
Barrier doesn't close	Check flag logic, ensure sensors detect car passage

Project Structure

Parking-System-Using-Arduino/
├── Parking.ino          # Main Arduino sketch
└── README.md           # This file

Contributing

Contributions are welcome! Please feel free to submit a Pull Request.

License

This project is open source and available for educational purposes.

Author

Yousef Elbilkasy

Acknowledgments

• Arduino community for libraries and support
• Embedded Systems course project

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Note: This is an educational project. For production use, consider adding error handling, sensor calibration, and fail-safe mechanisms.