#define TRIGGER_PIN  17
#define ECHO_PIN     16

void setup() {
  Serial.begin(115200);        // Start serial communication at 115200 baud
  pinMode(TRIGGER_PIN, OUTPUT); // Set the trigger pin as an OUTPUT
  pinMode(ECHO_PIN, INPUT);     // Set the echo pin as an INPUT
}

void loop() {
  long duration;
  float distance;

  // Send a 10 microsecond pulse to the trigger pin
  digitalWrite(TRIGGER_PIN, LOW);
  delayMicroseconds(2);
  digitalWrite(TRIGGER_PIN, HIGH);
  delayMicroseconds(10);
  digitalWrite(TRIGGER_PIN, LOW);

  // Read the duration of the pulse from the echo pin
  duration = pulseIn(ECHO_PIN, HIGH);

  // Calculate the distance in cm (duration / 2) / 29.1
  distance = (duration / 2.0) / 29.1;

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

  delay(500); // Wait for 500 milliseconds before taking the next reading
}