🚗 RFID Smart Parking System with Arduino UNO
Created by Madan R Date: 18/05/2025
📋 Project Overview This project is an RFID-based Smart Parking System using Arduino UNO. It integrates:
RFID (MFRC522) for user authentication,
IR sensors for slot occupancy detection,
Ultrasonic sensors for vehicle detection at entry and exit,
Servo motors for gate control,
ESP8266 for uploading data to the cloud (e.g., Google Sheets via Apps Script),
LEDs and Buzzer for feedback.
[Hardware Components]
Component Quantity Description Arduino UNO 1 Main controller MFRC522 RFID 1 For scanning RFID tags Servo Motor 2 For entry and exit gates HC-SR04 2 Entry and exit vehicle detection IR Sensors 3 For detecting slot availability ESP8266 (e.g.,NodeMCU) 1 For cloud communication via SoftwareSerial LEDs 2 Green (access granted), Red (denied) Buzzer 1 Sound alert for denial Power Supply 1 5V regulated power supply
[Pin Configuration]
Purpose Pin RFID SS (SDA) D10 RFID RST D9 IR Sensor Slot 1 A0 IR Sensor Slot 2 A1 IR Sensor Slot 3 A2 Red LED + Buzzer A3 Green LED D2 Entry Ultrasonic Trig D7 Entry Ultrasonic Echo D8 Exit Ultrasonic Trig D4 Exit Ultrasonic Echo D3 Entry Servo D5 Exit Servo D6 ESP8266 RX, TX A4 (RX), A5 (TX) – SoftwareSerial
[How It Works]
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RFID Scan: When a vehicle is at the gate, the driver scans their RFID card.
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Validation: UID is checked against a list of authorized cards.
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Vehicle Detection:
If at Entry and authorized → check if slots are available.
If at Exit and authorized → verify if UID was previously registered (i.e., the car entered).
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Slot Assignment: An available slot (via IR sensors) is assigned.
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Gate Control: Gates are opened/closed using servo motors.
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ESP Communication: Status (ENTRY or EXIT), UID, available slots, and assigned slot are sent to ESP8266 via SoftwareSerial.
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Feedback: LEDs and buzzer indicate success/failure visually and audibly.
[##Notes] Distance for car detection: < 5cm from the ultrasonic sensor.
Empty slot logic: IR sensor returns HIGH when the slot is empty.
Gate movement: Smooth 0° ↔ 90° transition using servo.
##Setup Instructions
Connect all components as per the pin configuration.
Replace validUIDs[] with your RFID card UIDs.
Upload the code to the Arduino UNO.
Power the system and monitor the Serial output.
[Installation]
Upload Arduino Code (arduino_parking.ino)
Handles RFID, servo gates, IR/ultrasonic detection
Sends data to ESP8266 via Serial: ENTRY:UID:slots:slotno or EXIT:UID:slots:-
Upload ESP8266 Code (esp_parking.ino)
Receives Serial data from Arduino
Sends HTTP request to Google Apps Script Web App
Google Apps Script (Final-Parking)
Logs data to Google Sheet
Sends Gmail with PDF (Ticket/Receipt)
Logs feedback responses
Google Sheets Setup
Log Sheet ID: 1ofg-9cGfbXVbg6lBfyV7j*****************
Feedback Sheet ID: 14PausWOSExNV0K8o*****************
Sheet Names: Logs, Feedback, etc.
Email Output Entry Email:
PDF Ticket with UID, Entry Time, Slot,
"Welcome" message
Exit Email:
PDF Receipt with UID, Entry Time, Exit Time, Duration, Charge (Rs. 50/10 min) UPI QR code
Thank you Email with feedback and payment confirm:
feedback form :
project image:
📽️ Watch Demo Video:
for knowing RFID CARD UID use this : https://github.com/Madannayak003/RFID_UID-ARDUINO
MIT License © 2025 Madan R
