const int triggerPin = 4p; // GPIO pin for the ultrasonic sensor trigger
const int echoPin = 3;    // GPIO pin for the ultrasonic sensor echo

void setup() {
  Serial.begin(9600);
  pinMode(triggerPin, OUTPUT);
  pinMode(echoPin, INPUT);
}

void loop() {
  // Trigger ultrasonic sensor by sending a pulse
  digitalWrite(triggerPin, LOW);
  delayMicroseconds(2);
  digitalWrite(triggerPin, HIGH);
  delayMicroseconds(10);
  digitalWrite(triggerPin, LOW);

  // Measure the duration of the echo pulse
  unsigned long duration = pulseIn(echoPin, HIGH);

  // Calculate the distance in centimeters
  float distance = (duration * 0.0343) / 2;

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

  delay(1000); // Wait for a short duration before the next measurement
}