#include "DHT.h"
#define DHTPIN 21
#define DHTTYPE DHT22

DHT dht(DHTPIN, DHTTYPE);

void setup() {
  pinMode(15, OUTPUT);
  pinMode(35, INPUT_PULLUP);

  // initialize serial for debugging
  Serial.begin(115200);
  dht.begin();
}

void loop() {
  if(digitalRead(35)==LOW)
  {
  digitalWrite(15, HIGH);
  }
  else
{
 digitalWrite(15, LOW);

 float temperature = dht.readTemperature();
 float humidity = dht.readHumidity();
  Serial.print(F("Humidity: "));
  Serial.print(humidity);
  Serial.print(F("%  Temperature: "));
  Serial.print(temperature);
  Serial.println(F("°C "));

  delay(500);
}
 
}