#include "Arduino.h"
#include <LiquidCrystal.h>
#define PHOTOPIN  A3
LiquidCrystal lcd(12, 11, 5, 4, 3, 2);

void setup()
{
  lcd.begin(16,2);
  Serial.begin(9600);
  pinMode(PHOTOPIN, INPUT);
}

void photo_sensor(void)
{
  float photo = 0.0;
  photo = (analogRead(PHOTOPIN) * 100.0) / 1023.0;
  Serial.println("Light : ");
  Serial.println(photo);
  Serial.print("\n");
  lcd.clear();
  lcd.setCursor(0, 0);
  lcd.print("Light : ");
  lcd.setCursor(8, 0);
  lcd.print(photo);
  lcd.print("%");
  delay(1000);
}

void loop()
{
  photo_sensor();
}