#include "LiquidCrystal_I2C.h"
#include "DHT.h"
//#include <DHT.h>
#define I2C_ADDR    0x27
#define LCD_COLUMNS 20
#define LCD_LINES   4

LiquidCrystal_I2C lcd(I2C_ADDR, LCD_COLUMNS, LCD_LINES);
#define dht_dpin 4     
//#define DHTTYPE DHT11   // DHT 11
#define DHTTYPE DHT22   
DHT dht(dht_dpin, DHTTYPE);
int SW1 = 8; 
int SW2 = 12;
int SW3 = 13;
float Temperatur;


void setup() {
  
  lcd.init();
  lcd.backlight();
  pinMode(dht_dpin, INPUT);
  pinMode(13, OUTPUT);
  pinMode(12, OUTPUT);
  pinMode(8, OUTPUT);
  dht.begin();

}

void loop() 

{
 
Temperatur = dht.readTemperature() ;
int IntTemp = Temperatur;

 
switch (IntTemp) {

  case 0 : {
    digitalWrite(13, LOW);
    digitalWrite(12, LOW);
    digitalWrite(8, LOW);
    lcd.setCursor(3, 0);
    lcd.print("Heizung AUS");
    lcd.setCursor(0, 1);
    lcd.print("Modus1 - 5 bis 18 C");
    lcd.setCursor(0, 2),
    lcd.print("Modus2 - 19 bis 21 C"),
    lcd.setCursor(0, 3);
    lcd.print("Modus3 - 22 bis 24 C");
     break;
  }

  case 5 ... 18 : {
    digitalWrite(13, HIGH);
    lcd.setCursor(3, 0);
    lcd.print("Heizung AN");
    lcd.setCursor(0, 1);
    lcd.print("Temperatur:  ");
    lcd.print(Temperatur);
    lcd.print(" C.");
    lcd.setCursor(2, 2),
    lcd.print("Heizungsbereich"),
    lcd.setCursor(0, 3);
    lcd.print("Maximum: 18 Grad");
     break;
  }
  case 19 ... 21 :{
    digitalWrite(12, HIGH);
    lcd.setCursor(3, 0);
    lcd.print("Heizung AN");
    lcd.setCursor(0, 1);
    lcd.print("Temperatur: ");
    lcd.print(Temperatur);
    lcd.print(" C.");
    lcd.setCursor(2, 2),
    lcd.print("Heizungsbereich"),
    lcd.setCursor(0, 3);
    lcd.print("Maximum: 21 Grad");
     break;

  }
  case 22 ... 24 :{
    digitalWrite(8, HIGH);
    lcd.setCursor(3, 0);
    lcd.print("Heizung AN");
    lcd.setCursor(0, 1);
    lcd.print("Temperatur: ");
    lcd.print(Temperatur);
    lcd.print(" C.");
    lcd.setCursor(2, 2),
    lcd.print("Heizungsbereich"),
    lcd.setCursor(0, 3);
    lcd.print("Maximum: 24 Grad");
    break;
  }
  case 25 ... 35 :{
    digitalWrite(8, LOW);
    digitalWrite(12, LOW);
    digitalWrite(13, LOW);
    lcd.setCursor(3, 0);
    lcd.print("Heizung AUS");
    
    lcd.setCursor(2, 2),
    lcd.print("Heizungsbereich"),
    lcd.setCursor(2, 3);
    lcd.print("Maximum erreicht");
    break;
  }
}
}