#include <LiquidCrystal_I2C.h>

LiquidCrystal_I2C lcd(0x27, 16, 2);
int value, last_value = 0;

void setup() {
  // put your setup code here, to run once:
  pinMode(A0, INPUT);

  lcd.init();
  lcd.clear();
  lcd.backlight();

  lcd.setCursor(0, 0);
  lcd.print("I2C LCD Test");

  lcd.setCursor(0, 1);
  lcd.print("Hello World!");
}

void loop() {
  // put your main code here, to run repeatedly:
  value = analogRead(A0);

  if(value != last_value) {
    last_value = value;
    lcd.setCursor(0, 1);
    lcd.print("                ");
  }
  
  lcd.setCursor(0, 1);
  lcd.print(value);
  delay(100);

}