#define trigger 3 // Trigger pin of ultrasonic sensor
#define echo 2  // Echo pin of ultrasonic sensor

void setup() {
  pinMode(trigger, OUTPUT);
  pinMode(echo, INPUT);
  Serial.begin(115200);
}

void loop() {
  // Generating a pulse
  digitalWrite(trigger, HIGH);
  delayMicroseconds(10);
  digitalWrite(trigger, LOW);

  int timeTaken = pulseIn(echo, HIGH); // Time taken for the generated pulse to be received back
  double distanceCm = distanceInCm(timeTaken);
  int distancem = distanceCm / 100;
  Serial.println("Distance in cm: ");
  Serial.println(distanceCm);
  delay(200);


}

double distanceInCm(int time){
    return time / 29.4117 / 2;
}