#include "DHT.h"

#define DHTPIN 2     
#define DHTTYPE DHT22   // DHT 22  (AM2302), AM2321
DHT dht(DHTPIN, DHTTYPE);

#define DHTPIN2 3     
#define DHTTYPE DHT22   // DHT 22  (AM2302), AM2321
DHT dht2(DHTPIN2, DHTTYPE);

#define LED 4

float Ts =90.00;
float Dh;
float Tk;



void setup() {
  Serial.begin(115200);
  Serial.println(F("DHT22 example!"));

  dht.begin();
  dht2.begin();
  pinMode(LED, OUTPUT);


}

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

   // Check if any reads failed and exit early (to try again).
  if (isnan(temperature) || isnan(humidity)) {
    Serial.println(F("Failed to read from DHT sensor!"));
    return;
  }

  float temperature2 = dht2.readTemperature();
  float humidity2 = dht2.readHumidity();

   // Check if any reads failed and exit early (to try again).
  if (isnan(temperature2) || isnan(humidity2)) {
    Serial.println(F("Failed to read from DHT2 sensor!"));
    return;
  }

 
  Dh = Ts- humidity,
  Tk = temperature +  Dh * 1/5;
  if (Tk < 16){
    digitalWrite(LED, HIGH);
  delay(2000);
  digitalWrite(LED, LOW);
  delay(50);
  }

  
  Serial.print(F(" Humidity:  "));
  Serial.print(humidity);
  Serial.print(F("%  Temperature:  "));
  Serial.print(temperature);
  Serial.println(F("°C"));
  

 
  Serial.print(F(" Humidity2: "));
  Serial.print(humidity2);
  Serial.print(F("%  Temperature2:  "));
  Serial.print(temperature2);
  Serial.println(F("°C "));
  
  Serial.print(F(" delta Hy.: "));
  Serial.print(Dh);
  Serial.print(F("%  Temp.korr.:   "));
  Serial.print(Tk);
  Serial.println(F("°C "));
  delay(2000);
}