#define LDR_PIN 2
#include <LiquidCrystal_I2C.h>
LiquidCrystal_I2C lcd(0x27, 20, 4);
void setup() {
pinMode(LDR_PIN, INPUT);
lcd.init();
lcd.backlight();
}
void loop() {
lcd.setCursor(2, 0);
lcd.print("Room: ");
if (digitalRead(LDR_PIN) == LOW) {
lcd.print("DARK!");
} else {
lcd.print("LIGHT");
}
delay(100);
}