#include <Ultrasonic.h>

const int triggerPin = 5;  // Trigger pin connected to D5
const int echoPin = 18;    // Echo pin connected to D18

Ultrasonic ultrasonic(triggerPin, echoPin);

void setup() {
  Serial.begin(115200);
}

void loop() {
  long distance = ultrasonic.read();  // Read the distance in centimeters

  if (distance >= 0) {
    Serial.print("Distance: ");
    Serial.print(distance);
    Serial.println(" cm");
  } else {
    Serial.println("Error reading distance.");
  }

  delay(1000);  // Delay 1 second before taking another reading
}