#include <Servo.h>

#define ECHO_PIN 13
#define TRIG_PIN 11
#define pinBuzzer 2

Servo myservo;

void setup() {
  pinMode(TRIG_PIN, OUTPUT);
  pinMode(ECHO_PIN, INPUT);
  pinMode(pinBuzzer,OUTPUT);

  Serial.begin(115200);
  myservo.attach(10);
}

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

void loop() {
float distance = readDistanceCM();
Serial.println("JARAK SENSOR: ");
Serial.println(readDistanceCM());

if (distance <= 200){
  myservo.write(90);
  delay(35);
  tone(pinBuzzer, 1000);
  delay(200);
  tone(pinBuzzer, 500);
  delay(200);  
}
else {
myservo.write(0);
noTone(pinBuzzer);
}
}