#include <LiquidCrystal_I2C.h>  
int ledPin = 13;  
int ldrPin = A1;  

#define I2C_ADDR    0x27  
#define LCD_COLUMNS 16     
#define LCD_LINES   2   

LiquidCrystal_I2C lcd(I2C_ADDR, LCD_COLUMNS, LCD_LINES);

void setup() {
  lcd.init(); 
  lcd.backlight();
  Serial.begin(9600);
  pinMode(ledPin, OUTPUT);
  pinMode(ldrPin, INPUT);
  lcd.begin(16,2);
  lcd.print("KECERAHAN: ");
}

void loop() {
  Serial.println("RITA DETITA");
  int statusldr = analogRead(ldrPin);  
  if (statusldr <= 250) {
    digitalWrite(ledPin, HIGH);  
    delay(500); 
    
    lcd.setCursor(0, 1);
    lcd.print("GELAP: "); 
    lcd.print(statusldr);
    lcd.print("   ");
    delay(500);

  } else {
    digitalWrite(ledPin, LOW);  
    lcd.setCursor(0, 1);
    lcd.print("TERANG: ");
    lcd.print(statusldr);
    lcd.print("   ");
    delay(500); 
  }
}