const int trigPin = 2;
const int echoPin = 4;
long duration;
int distance;
void setup() {
  // put your setup code here, to run once:
  Serial.begin(9600);
  Serial.println("Hello, ESP32!");
  pinMode(trigPin, OUTPUT);
  pinMode(echoPin, INPUT);
  pinMode(18, OUTPUT);
  pinMode(14, OUTPUT);
  pinMode(5, OUTPUT);

  delay(1000);
}

void loop() {
 int pirValue = digitalRead(18);

  Serial.print("PIR Sensor Value: ");
  Serial.println(pirValue);

if(pirValue==LOW)
{
  digitalWrite(14, LOW);
  delay(1000);
}
else if(pirValue==HIGH){
  digitalWrite(14, HIGH);
  delay(1000);
}

delay(1000);

 digitalWrite(trigPin, LOW);
  delayMicroseconds(2);
  digitalWrite(trigPin, HIGH);
  delayMicroseconds(10);
  digitalWrite(trigPin, LOW);

 
  duration = pulseIn(echoPin, HIGH);

  
  distance = duration * 0.034 / 2;

 
  Serial.print("Distance: ");
  Serial.print(distance);
  Serial.println(" cm");


  if (distance < 100) {
    
   // digitalWrite(buzzerPin, HIGH);
   // playTone(buzzerPin, 1000, 200);
    digitalWrite(5, HIGH);
    delay(200);
   
   
  


  } else {
   
    //digitalWrite(buzzerPin, LOW);
     digitalWrite(12, LOW);
    delay(1000);
     
  }

 
  delay(1000); 

}