#include "DHT.h"

#define DHTPIN  15
#define DHTTYPE DHT22
DHT dht(DHTPIN, DHTTYPE);

void setup() {
  Serial.begin(115200);
  pinMode(26, OUTPUT);
  pinMode(14, OUTPUT);
  Serial.println(F("DHTxx test!")); 

  dht.begin();
}

void loop() {
  delay(500);
 float t = dht.readTemperature();

 Serial.print(F("% Temperature: "));
 Serial.println(t);

 if (t < 20)
 {
  digitalWrite(14, LOW);
  digitalWrite(26, HIGH);
 }
 if (t > 20)
 {
   digitalWrite(26, LOW);
  digitalWrite(14, HIGH);
 }
}