#include <Wire.h>
#include <LiquidCrystal_I2C.h>

const int ldr = 34;   
const int led = 25;    
const int batas = 1000;

LiquidCrystal_I2C lcd(0x27, 16, 2); 

void setup() {
 pinMode(led, OUTPUT); 
 Wire.begin(21, 22); 
 lcd.init();        
 lcd.backlight();   
 lcd.setCursor(0, 0);
}
void loop() {
int nilaiLdr = analogRead(ldr); 
lcd.setCursor(0,0);
lcd.print("nilai LDR: ");
lcd.print(nilaiLdr);
lcd.print("  ");

if (nilaiLdr > batas) {
digitalWrite(led, HIGH); 
lcd.setCursor(0, 1);  
lcd.print("LED:ON ");
} else {
digitalWrite(led, LOW);  
lcd.setCursor(0, 1);  
lcd.print("LED:OFF");
}
delay(500); 
}