//automatic gate operation- the car will detected and the gates should open)

#include <Servo.h>
int echopin = A0;
int trigpin =7;
int Time;
int Distance;

Servo myservo;

void setup() 
{ 
pinMode(trigpin, OUTPUT);
pinMode(echopin, INPUT);
myservo.attach(11);
}

void loop() 
{
  digitalWrite(trigpin, LOW);
  digitalWrite(trigpin, HIGH);
  Time =pulseIn(echopin,HIGH);
  Distance= Time * 0.0172;//formula for Distancetance 
  if (Distance>30)
  {
    myservo.write(90);//Angle of Rotation
  }
  else{
     myservo.write(0);//Angle of Rotation
  }
}