#include <LiquidCrystal_I2C.h>

#define LDR 28 // pin AO de LDR

LiquidCrystal_I2C lcd(0x27, 16, 2);

void setup() {
  // put your setup code here, to run once:
 lcd.init();
 lcd.backlight();
 lcd.setCursor(2, 0);
 lcd.print("LDR:");

 pinMode(LDR, INPUT);
}

void loop() {
  // put your main code here, to run repeatedly:
  lcd.setCursor(6,1);
  int adcValue = analogRead(LDR);
  lcd.print(adcValue); // se imprime el valor de la LDR
 
  delay(100); 
}