const int trigPin = 9;  // Trig pin of the sensor connected to pin 9
const int echoPin = 10; // Echo pin of the sensor connected to pin 10

void setup() {
  Serial.begin(9600);  // Start serial communication at 9600 baud rate
  pinMode(trigPin, OUTPUT);  // Set trigPin as an output
  pinMode(echoPin, INPUT);   // Set echoPin as an input
}

void loop() {
  // Send a 10 microsecond pulse to trigger the sensor
  digitalWrite(trigPin, LOW);
  delayMicroseconds(2);
  digitalWrite(trigPin, HIGH);
  delayMicroseconds(10);
  digitalWrite(trigPin, LOW);

  // Read the duration of the echo signal
  long duration = pulseIn(echoPin, HIGH);

  // Calculate the distance (speed of sound is ~343 meters per second or 29.1 microseconds per cm)
  int distance = duration * 0.034 / 2;

  // Print the distance in centimeters
  Serial.print("Distance: ");
  Serial.print(distance);
  Serial.println(" cm");

  delay(500);  // Wait half a second before the next reading
}