// Define pin connections
const int trigPin = 9; // Trigger pin
const int echoPin = 10; // Echo pin

// Variables to store distance and duration
long duration;
int distance;

void setup() {
  // Initialize serial communication
  Serial.begin(9600);

  // Set trigPin as an OUTPUT and echoPin as an INPUT
  pinMode(trigPin, OUTPUT);
  pinMode(echoPin, INPUT);
}

void loop() {
  // Clear the trigPin
  digitalWrite(trigPin, LOW);
  delayMicroseconds(2);

  // Set the trigPin HIGH for 10 microseconds
  digitalWrite(trigPin, HIGH);
  delayMicroseconds(10);
  digitalWrite(trigPin, LOW);

  // Read the echoPin and calculate the distance
  duration = pulseIn(echoPin, HIGH);
  distance = duration * 0.034 / 2; // Convert to centimeters

  // Print the distance to the Serial Monitor
  Serial.print("Distance: ");
  Serial.print(distance);
  Serial.println(" cm");

  // Wait a bit before the next measurement
  delay(500);
}