#include "DHT.h"

#define DHTPIN 4     // Digital pin connected to the DHT sensor
#define LEDPIN1 26
#define LEDPIN2 13
#define SWITCH 15

#define DHTTYPE DHT22   // DHT 22
DHT dht(DHTPIN, DHTTYPE);

float soll_temperatur = 18.0;

void setup() {
  Serial.begin(115200);   
  Serial.println("DHT22 test!");
  dht.begin();
  pinMode(LEDPIN1, OUTPUT);
  pinMode(LEDPIN2, OUTPUT);
  pinMode(SWITCH, INPUT_PULLUP);
}

void loop() {
  delay(2000);                      // Wait 2 seconds between measurements

  float h = dht.readHumidity();     // Reading humidity
  float t = dht.readTemperature();  // Read temperature as Celsius

  if(digitalRead(SWITCH) == HIGH){
    soll_temperatur = 18.0;
  }
  else{
    soll_temperatur = 25.0;
  }
  Serial.print("soll_temperatur = "); Serial.println(soll_temperatur);

  // Check if any reads failed and exit early (to try again).
  if (isnan(h) || isnan(t)) {
    Serial.println("DHT sensor Fehler!");
    return;
  }

  Serial.print("Feuchtigkeit: "); Serial.print(h); Serial.println("%");
  Serial.print("Temperatur: "); Serial.print(t); Serial.println("°C ");

  if(t < soll_temperatur){ 
    digitalWrite(LEDPIN1, HIGH);
    Serial.println("\t Heizung ON!");
  }
  else{
    digitalWrite(LEDPIN1, LOW);
    Serial.println("\t Heizung OFF!");
  }

  if(h > 50.0){
    digitalWrite(LEDPIN2, HIGH);
    Serial.println("\t Luefter ON!");
  }
  else{
    digitalWrite(LEDPIN2, LOW);
    Serial.println("\t Luefter OFF!");
  }
}