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

#define DHTPIN 1     // what pin we're connected to
#define DHTTYPE DHT11   // DHT 11 
DHT dht(DHTPIN, DHTTYPE); //// Initialize DHT sensor for normal 16mhz Arduino

// Initialize the LCD connected to pins 27, 26, 25, 24, 23, 22
LiquidCrystal_I2C lcd(0x27, 16, 2);  // set the LCD address to 0x27 for a 16 chars and 2 line display

const int ledPin1 = 13;
const int ledPin2 = 12;

unsigned long previousMillis = 0; 
const long interval = 1000;  // interval at which to blink (milliseconds)

void setup()
{
  lcd.begin(16, 2);  // initialize the lcd 
  dht.begin();

  pinMode(ledPin1, OUTPUT);
  pinMode(ledPin2, OUTPUT);
}

void loop() 
{
  unsigned long currentMillis = millis();

  if (currentMillis - previousMillis >= interval) {
    previousMillis = currentMillis;

    // Reading temperature or humidity takes about 250 milliseconds!
    float h = dht.readHumidity();
    float t = dht.readTemperature(true);
    lcd.clear();
    lcd.setCursor(0, 0);
    lcd.print("Temp: ");
    lcd.print(t);
    lcd.print(" *C");
    lcd.setCursor(0, 1);
    lcd.print("Humidity: ");
    lcd.print(h);
    lcd.print(" %");  
  }

  // blink LED1 every 0.5 seconds
  if (currentMillis % 500 == 0) {
    digitalWrite(ledPin1, !digitalRead(ledPin1));
  }

  // blink LED2 every 1 second
  if (currentMillis % 1000 == 0) {
    digitalWrite(ledPin2, !digitalRead(ledPin2));
  }
}