#include <Servo.h>

int IR_SENSOR_PIN = 2; 
int SERVO_PIN = 9;     
int LED_PIN = 13;     

Servo gateServo;             
int CLOSED_ANGLE = 0; 
int OPEN_ANGLE = 90;  
const long OPEN_DURATION = 5000; 

bool gateIsOpen = false;
unsigned long gateOpenStartTime = 0;

void setup() {
  Serial.begin(9600); 
  pinMode(IR_SENSOR_PIN, INPUT); 
  pinMode(LED_PIN, OUTPUT);      

  gateServo.attach(SERVO_PIN); 
  gateServo.write(CLOSED_ANGLE); 
  digitalWrite(LED_PIN, LOW);    

  Serial.println("Automatic Gate System Initialized.");
}

void loop() {
  int irSensorValue = digitalRead(IR_SENSOR_PIN);
  if (irSensorValue == LOW && !gateIsOpen) {
    openGate();
  }

  if (gateIsOpen && (millis() - gateOpenStartTime >= OPEN_DURATION)) {
    closeGate();
  }

  Serial.print("IR Sensor: ");
  Serial.print(irSensorValue == LOW ? "Object Detected" : "Clear");
  Serial.print(" | Gate Status: ");
  Serial.println(gateIsOpen ? "Open" : "Closed");

  delay(100);
}

void openGate() {
  Serial.println("Object detected. Opening gate...");
  gateServo.write(OPEN_ANGLE); 
  digitalWrite(LED_PIN, HIGH); 
  gateIsOpen = true;
  gateOpenStartTime = millis(); 
}

void closeGate() {
  Serial.println("Closing gate");
  gateServo.write(CLOSED_ANGLE); 
  digitalWrite(LED_PIN, LOW);    
  gateIsOpen = false;
}