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

LiquidCrystal_I2C lcd(0x27,20,3);  

#define DHTPIN 2 
#define DHTTYPE DHT22
DHT dht(DHTPIN, DHTTYPE);

RTC_DS1307 rtc;

#define DHT22_PIN 2
void setup()
{
    Serial.begin(9600);
    lcd.init();                     
    lcd.setCursor(0,0);
    lcd.print("Hallo Welt");
    //Task 2
    dht.begin();
    //Task 3
    if (! rtc.begin()) {
      Serial.println("Couldn't find RTC");
      Serial.flush();
      abort();
    }
}


void loop()
{
  //Task 2
  float humidity = dht.readHumidity();
  float temperature = dht.readTemperature();

  // reading values from sensor failed
  if(isnan(humidity) || isnan(temperature)){
    return; // exit
  }

  lcd.setCursor(0,0);
  lcd.print("L-F: ");
  lcd.print(humidity);
  lcd.println("%");
  delay(2000);
  lcd.clear();
  lcd.setCursor(0,0);
  lcd.print("Temperatur: ");
  lcd.print(temperature);
  lcd.println("C");
  delay(2000);
  lcd.clear();
  lcd.setCursor(0,0);
  //Task 3
  DateTime now = rtc.now();
  lcd.print("time: ");
  lcd.print(now.hour(), DEC);
  lcd.print(':');
  lcd.print(now.minute(), DEC);
  lcd.print(':');
  lcd.println(now.second(), DEC);
  delay(2000);
  lcd.clear();
}