#include <LiquidCrystal_I2C.h>
#define VR 36
#define LED 18
LiquidCrystal_I2C lcd(0x27,16,2);

void setup() {
  pinMode(LED, OUTPUT);
  Serial.begin(9600);
  lcd.init();
  lcd.backlight();
  lcd.print("VR");
}
void loop() {
  int vp=analogRead(VR);
  Serial.println(vp);
  lcd.setCursor(1,1);
  lcd.print("Value= ");
  lcd.setCursor(9,1);
  lcd.print(vp);
  delay(2000);
  lcd.setCursor(9,1);
  lcd.print("       ");     //ลบข้อมูลค่าvpออก
  delay(1000);
  if(vp >2047)
    digitalWrite(LED,LOW);
  else digitalWrite(LED, HIGH);

}