const int trig=7;
const int echo=6;
long duration;
long distance;
void setup() {
Serial.begin(115200);
pinMode(trig, OUTPUT);
pinMode(echo, INPUT);
}

void loop() {
  // put your main code here, to run repeatedly:
  digitalWrite(trig, LOW);

  delayMicroseconds(2); // this speeds up the simulation
   digitalWrite(trig, HIGH);
   delayMicroseconds(10);
    digitalWrite(trig, LOW);
    duration = pulseIn(echo,HIGH); // trigger travel and hit the surface
    distance=(duration *0.034/2) + 1;
    Serial.println("Distance="+String(distance));
    delay(1000);
    digitalWrite(trig, LOW);

  delayMicroseconds(2); // this speeds up the simulation
   digitalWrite(trig, HIGH);
   delayMicroseconds(10);
    digitalWrite(trig, LOW);
    duration = pulseIn(echo,HIGH); // trigger travel and hit the surface
    distance=(duration *0.034/2) + 1;
    Serial.println("Distance="+String(distance));
    delay(1000);
    //data = dhtSensor.getTempAndHumidity();
  //Serial.println("Temp ="+String(data.temperature));
  //Serial.println("Humidity="+String(data.humidity));
  delay(1000); // this speeds up the simulation
  if(distance<30)
  {
  digitalWrite(10, HIGH);
  //tone(buzzer, 1000); // Send 1KHz sound signal...
  delay(1000);        // ...for 1 sec
  }
  else
  {
  digitalWrite(10, LOW);
   
  delay(1000);  
  }
}