#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);
  pinMode(11, OUTPUT);
  
  
}

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

  if(distance <= 200){
  myservo.write(90);
  delay(15);
  tone(pinBuzzer, 5);
  digitalWrite(11, HIGH);
}

  else{
  myservo.write(0);
  noTone(pinBuzzer);
  }
}