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

LiquidCrystal_I2C lcd(0x27, 16, 2);
#define LDR_PIN 3
#define DHTPIN 2
#define DHTTYPE DHT11 
DHT dht(DHTPIN, DHTTYPE);
const float GAMMA = 0.7;
const float RL10 = 50;

void setup() {
lcd.begin(16,2);
dht.begin();
lcd.backlight();
pinMode(LDR_PIN, INPUT);
}

void loop() { 
int h = dht.readHumidity(); 
int t= dht.readTemperature();

int analogValue = analogRead(A0);
  float voltage = analogValue / 1024. * 5;
  float resistance = 2000 * voltage / (1 - voltage / 5);
  float lux = pow(RL10 * 1e3 * pow(10, GAMMA) / resistance, (1 / GAMMA));
/////////////////////////////////////////////////// 
lcd.clear();
lcd.setCursor(0,0);             
lcd.print("Humedad Relativa ");
lcd.setCursor(6,1);
lcd.print(h);
lcd.print(" %");                     
delay (2500);
///////////////////////////////////////////////////              
lcd.clear();
lcd.setCursor(3,0);
lcd.print("Temperature "); 
lcd.setCursor(6,1);
lcd.print(t);
lcd.print(" C'");                   
delay (2500);
///////////////////////////////////////////////////  
lcd.setCursor(2, 0);
  lcd.print("Clima: ");
  if (lux > 10000) {
    lcd.print("Terang!");
  } else {
    lcd.print("Gelap ");
  }

  lcd.setCursor(0, 1);
  lcd.print("Lux: ");
  lcd.print(lux);
  lcd.print("          ");

  delay(2500);
}