//Deklarasi variabel pin
#include <Servo.h>
Servo myservo;
int servopin = 11;
int trigPin = 13;
int echoPin = 12;
int ledPin = 10;
int buzzerPin = 9;
long duration;
long distance;
int maxdistance = 10;


int interval = 0;
int jmlh = 0;

void soundBuzzer(){
  if(interval < 500){
    tone(buzzerPin, 250);
  }else
  if(interval > 500){
    tone(buzzerPin, 100,800);
  };
}


void setup() {
pinMode(trigPin, OUTPUT);
pinMode(echoPin, INPUT);
Serial.begin(9600);
pinMode(buzzerPin, OUTPUT);
pinMode(ledPin, OUTPUT);
myservo.attach(servopin);
myservo.write(90);

}

void loop() {
digitalWrite(trigPin, LOW);
delayMicroseconds(2);
digitalWrite(trigPin, HIGH);
delayMicroseconds(10);
digitalWrite(trigPin, LOW);
duration = pulseIn(echoPin, HIGH);
distance = (duration/2) / 29.1;
  if(distance <= maxdistance) {
    myservo.write(0);
    soundBuzzer();
    digitalWrite(ledPin, HIGH);
    delay(2000);
    jmlh = jmlh + 1;
    Serial.print("  Jumlah Kendaraan : ");
    Serial.println(jmlh);
    
  }
  else {
  myservo.write(90);
  noTone(buzzerPin);
  
  digitalWrite(ledPin, LOW);
  delay(1000);
  } 
Serial.print("  Jarak : ");  
Serial.print(distance);
Serial.println(" cm");
}