const int trigPin = 10; // Connects to TRIG
const int echoPin = 9;  // Connects to ECHO (via Voltage Divider)

void setup() {
  Serial.begin(115200);
  pinMode(trigPin, OUTPUT);
  pinMode(echoPin, INPUT);
}

void loop() {
  long duration;
  float distance;

  // Clear the trigger
  digitalWrite(trigPin, LOW);
  delayMicroseconds(2);

  // Send 10 microsecond pulse
  digitalWrite(trigPin, HIGH);
  delayMicroseconds(10);
  digitalWrite(trigPin, LOW);

  // Read the echo pulse (duration in microseconds)
  duration = pulseIn(echoPin, HIGH);

  // Calculate distance in cm (Speed of sound is 343 m/s)
  distance = (duration * 0.0343) / 2;

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

  delay(500); // 0.5 second delay between readings
}