#define TRIG_PIN 7
#define ECHO_PIN 6

long duration;
float distance;

void setup() {
  Serial.begin(9600);
  pinMode(TRIG_PIN, OUTPUT);
  pinMode(ECHO_PIN, INPUT);
}

void loop() {
  // Clear the trig pin
  digitalWrite(TRIG_PIN, LOW);
  delayMicroseconds(2);

  // Send 10µs pulse to trigger
  digitalWrite(TRIG_PIN, HIGH);
  delayMicroseconds(10);
  digitalWrite(TRIG_PIN, LOW);

  // Read the echo time
  duration = pulseIn(ECHO_PIN, HIGH);

  // Calculate distance in cm
  distance = (duration / 2.0) * 0.0343;

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

  delay(500);
}