#include  <LiquidCrystal_I2C.h>
LiquidCrystal_I2C lcd(0x27, 20,4); 
int ldr = 15; // analog pin 3
int ledPin = 16; // led
int val ;

void setup()
{
  pinMode(ldr,INPUT);
  pinMode(ledPin, OUTPUT);
  Serial.begin(9600);
  lcd.begin();
  lcd.backlight();
  delay(50);
  lcd.noBacklight();
  delay(50);
  lcd.backlight();
  lcd.setCursor(0,0);
  lcd.print("Fablab Kamakura");
  delay(500);
  lcd.setCursor(0,1);
  lcd.print("Setyawan UGM");
  delay(500);
  lcd.clear();
}

void loop()
{
  val=analogRead(ldr);
  Serial.print("LDR value :");
  Serial.print(val);
  if (val<300){  //decision for Night and Day
     Serial.println("--> Night");
     digitalWrite(ledPin, HIGH); 
     lcd.setCursor(0,2);
     lcd.print("LDR value :");
     lcd.setCursor(13,2);
     lcd.print(val);
     lcd.setCursor(0,3);
     lcd.print("Status :");
     lcd.setCursor(13,3);
     lcd.print("Night");
     lcd.clear();     
  }
  else {
     Serial.println("--> Day");
     digitalWrite(ledPin, LOW); 
     lcd.setCursor(0,2);
     lcd.print("LDR value :");
     lcd.setCursor(13,2);
     lcd.print(val);
     lcd.setCursor(0,3);
     lcd.print("Status :");
     lcd.setCursor(13,3);
     lcd.print("Day"); 
     lcd.clear();
  }

}