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

#include <Servo.h>
Servo myservo;

int potPin = 0;
int val;

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);
  myservo.attach(9);

}

void loop() {
  float distance = readDistanceCM();
  Serial.print("Measured distance: ");
  Serial.println(readDistanceCM());

  if(distance <= 200){
    myservo.write(90);
    delay(15);
    tone(pinBuzzer, 1000);
    delay(200);
    tone(pinBuzzer, 500);
    delay(200);
  } else{
    myservo.write(0);
    noTone(pinBuzzer);
  }
}