#include <LiquidCrystal_I2C.h>
#include <Wire.h>

#define trigPin 9
#define echoPin 8
#define max_distance 200

LiquidCrystal_I2C lcd(0x27, 16, 2); // Address 0x27 for a 16x2 display

void setup() {
  Serial.begin(9600);
  pinMode(trigPin, OUTPUT);
  pinMode(echoPin, INPUT);
  lcd.init();       // Initialize the LCD
  lcd.backlight();  // Turn on backlight
}

void loop() {
  long duration, distance;
  
  digitalWrite(trigPin, LOW);
  delayMicroseconds(2);
  digitalWrite(trigPin, HIGH);
  delayMicroseconds(10);
  digitalWrite(trigPin, LOW);
  
  duration = pulseIn(echoPin, HIGH);
  
  distance = duration * 0.034 / 2;
  
  lcd.setCursor(0, 0);
  lcd.print("Height: ");
  lcd.print(180- distance);
  lcd.print(" cm");
  
  delay(1000);
  lcd.clear(); // Clear the display for the next measurement
}