The Smart Parking Assistant System is an embedded IoT-inspired project built using Arduino that replicates an intelligent parking gate mechanism. It uses an ultrasonic sensor to continuously measure the distance of an approaching vehicle and provides real-time guidance through LED indicators, buzzer alerts, and an LCD display.
As the vehicle reaches a safe stopping distance, a servo motor automatically opens the parking gate, ensuring smooth and controlled entry.
- 📏 Real-time distance measurement using Ultrasonic Sensor
- 🚦 Traffic-style LED indicators (Green → Yellow → Red)
- 📢 Progressive buzzer alerts based on proximity
- 📟 LCD display with live distance and instructions
- 🔄 Automatic gate control using Servo motor
- ✨ User-friendly messages (e.g., Slow Down, STOP, Have a Great Day!)
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Vehicle detected at a long distance
- Green LED blinks
- LCD displays distance and normal approach message
-
Vehicle comes closer
- Yellow LED turns ON
- LCD shows “Slow Down”
- Buzzer beeps intermittently
-
Vehicle reaches minimum safe distance
- Red LED glows
- Continuous buzzer alert
- LCD displays “STOP” with distance
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Gate Operation
- Servo motor opens the gate automatically
- After vehicle passes, a welcome message is shown
- Arduino Board (UNO / Mega)
- Ultrasonic Sensor (HC-SR04)
- Servo Motor (SG90)
- LEDs (Red, Yellow, Green)
- Buzzer
- 16x2 LCD Display
- Resistors & Jumper Wires
- Embedded C / Arduino IDE
- Servo Motor Control
- Real-time Sensor Processing
- Conditional Logic & State Handling
parkingassistant.ino– Main Arduino source code containing sensor logic, LED control, LCD messages, buzzer alerts, and servo-based gate automation.
- Smart parking systems
- Automated entry/exit gates
- IoT-based traffic assistance
- Embedded systems learning projects
Hrichik Khandait