Smart Parking With OLED

244 viewsApril 3, 2026

Components & Supplies

×1Arduino Uno R3

×1OLED Display

×3IR Sensor

×1SG90 Servo Motor

×20Jumper Cables

Circuit Connections

Component	Pin		Pin	Component
OLED	SDA	→	A4	ARDUINO UNO
OLED	SCL	→	A5	ARDUINO UNO
OLED	VCC	→	5V	ARDUINO UNO
OLED	GND	→	GND	ARDUINO UNO
SERVO	RED	→	5V	ARDUINO UNO
SERVO	BROWN	→	GND	ARDUINO UNO
SERVO	YELLOW	→	Pin 9	ARDUINO UNO
IR SENSOR 1	OUT	→	Pin 2	ARDUINO UNO
IR SENSOR 2	OUT	→	Pin 3	ARDUINO UNO
IR SENSOR 3	OUT	→	Pin 4	ARDUINO UNO
IR SENSOR 1, 2, 3	GND	→	GND	ARDUINO UNO
IR SENSOR 1, 2, 3	VCC	→	5V	ARDUINO UNO

arduino— code.ino

#include <Wire.h>
#include <Adafruit_GFX.h>
#include <Adafruit_SSD1306.h>
#include <Servo.h>

#define SCREEN_WIDTH 128
#define SCREEN_HEIGHT 64
Adafruit_SSD1306 display(SCREEN_WIDTH, SCREEN_HEIGHT, &Wire, -1);

Servo gate;
const int irEntry = 2;
const int irSlot1 = 3;
const int irSlot2 = 4;

void setup() {
  Serial.begin(9600);
  
  if(!display.begin(SSD1306_SWITCHCAPVCC, 0x3C)) {
    Serial.println(F("OLED Missing"));
    for(;;);
  }
  
  // Initial Splash Screen
  display.clearDisplay();
  display.setTextSize(2); // Larger text for branding
  display.setTextColor(WHITE);
  display.setCursor(5, 25);
  display.println("@itzbandhan");
  display.display();
  delay(3000);

  gate.attach(9);
  gate.write(0); // Close gate

  pinMode(irEntry, INPUT);
  pinMode(irSlot1, INPUT);
  pinMode(irSlot2, INPUT);
}

void loop() {
  // Read Sensors (LOW = Car Detected)
  bool s1Full = (digitalRead(irSlot1) == LOW);
  bool s2Full = (digitalRead(irSlot2) == LOW);
  bool carAtEntry = (digitalRead(irEntry) == LOW);

  // Calculate availability
  int occupied = 0;
  if (s1Full) occupied++;
  if (s2Full) occupied++;
  int available = 2 - occupied;

  // 1. Check for Entry Request
  if (carAtEntry) {
    display.clearDisplay();
    display.setCursor(0, 20);
    display.setTextSize(1);
    
    if (available > 0) {
      display.println("WELCOME! GATE OPENING");
      display.display();
      gate.write(90); // Open
      delay(3500);    // Time for car to pass
      gate.write(0);  // Close
    } else {
      display.setTextSize(2);
      display.println("SORRY...");
      display.println("LOT FULL");
      display.display();
      delay(2000);
    }
  }

  // 2. Main Status Display
  display.clearDisplay();
  
  if (available == 0) {
    // BIG FULL MESSAGE
    display.setCursor(0, 10);
    display.setTextSize(2);
    display.println(" PARKING ");
    display.println("  FULL!  ");
    display.setTextSize(1);
    display.setCursor(15, 50);
    display.println("NO SPACE AVAILABLE");
  } else {
    // NORMAL STATUS
    display.setTextSize(1);
    display.setCursor(0, 0);
    display.println("--- SMART PARKING ---");
    display.drawLine(0, 10, 128, 10, WHITE);
    
    display.setCursor(0, 25);
    display.print("SLOT 1: ");
    display.println(s1Full ? "OCCUPIED" : "FREE");
    
    display.setCursor(0, 40);
    display.print("SLOT 2: ");
    display.println(s2Full ? "OCCUPIED" : "FREE");

    display.setCursor(0, 55);
    display.print("SPACES LEFT: ");
    display.print(available);
  }
  
  display.display();
  delay(300); // Quick refresh for sensors
}