#include <Servo.h>
#include <LiquidCrystal.h>

Servo servoMain;
int trigpin = 10;
int echopin = 9;
const int rs = 7, en = 6, d4 = 5, d5 = 4, d6 = 3, d7 = 2;

bool gateClosed = false; 
int distance;
float duration;
float cm;

LiquidCrystal lcd(rs, en, d4, d5, d6, d7);

void setup() {
  servoMain.attach(11); 
  pinMode(trigpin, OUTPUT);
  pinMode(echopin, INPUT);
  lcd.begin(16, 2);
}

void loop() {
  digitalWrite(trigpin, LOW);
  delay(2);
  digitalWrite(trigpin, HIGH);
  delayMicroseconds(10);
  digitalWrite(trigpin, LOW);
  duration = pulseIn(echopin, HIGH);
  cm = (duration / 58.82);
  distance = cm;

  if (distance > 60 && !gateClosed) {
    servoMain.write(180);
    lcd.clear(); 
    lcd.setCursor(0, 0);
    lcd.print("Gate Closed");
    delay(100);
    gateClosed = true; 
  } 
  else if (distance <= 60 && gateClosed) {
    servoMain.write(0);
    lcd.clear(); 
    lcd.setCursor(0, 0);
    lcd.print("Gate Opened");
    delay(50);
    gateClosed = false; 
  }
}