#define ECHO_PIN 3
#define TRIG_PIN 2
#define pinBuzzer 5
#define ledM 13

#include <Servo.h>

Servo myservo;

int val = 0;
int x = true;


float readDistanceCM() {
  digitalWrite(TRIG_PIN, LOW);
  delayMicroseconds (2);
  digitalWrite(TRIG_PIN, HIGH);
  delayMicroseconds(10);
  digitalWrite(TRIG_PIN, LOW);
  
  int duration = pulseIn (ECHO_PIN, HIGH);
  return duration * 0.034 / 2;
}

void setup(){
  pinMode(TRIG_PIN, OUTPUT);
  pinMode(ECHO_PIN, INPUT);
  Serial.begin(115200);
  pinMode(pinBuzzer, OUTPUT);
  pinMode(ledM, OUTPUT);
  myservo.attach(11);
}

void loop(){
  float distance = readDistanceCM();
  Serial.print("Jarak: ");
  Serial.println(readDistanceCM());
  
  if(distance <= 100){
    if(x == true)
    {
      val = val+10;
      myservo.write(val);
    }
    delay(15);
    tone(pinBuzzer, 1000);
    digitalWrite(ledM, HIGH);
    delay(200);
    tone(pinBuzzer, 500);
    digitalWrite(ledM, LOW);
    delay(200);

  }

  else{
    myservo.write(0);
    noTone(pinBuzzer);
    if(val == 90)
    {
      val = 0;
      x = true;
    }
  }
}