// Example testing sketch for various DHT humidity/temperature sensors
// Written by ladyada, public domain

#include "DHT.h"
#define DHTPIN 2     // what pin we're connected to

// Uncomment whatever type you're using!
//#define DHTTYPE DHT11   // DHT 11 
#define DHTTYPE DHT22   // DHT 22  (AM2302)
//#define DHTTYPE DHT21   // DHT 21 (AM2301)

// Initialize DHT sensor for normal 16mhz Arduino
DHT dht(DHTPIN, DHTTYPE);

void setup() {
  Serial.begin(9600); 
  Serial.println("DHT22 test!");
 
  dht.begin();
  pinMode(LED_BUILTIN, OUTPUT);
}

static bool measure_environment(float* temperature, float* humidity){

  *humidity = dht.readHumidity();
  *temperature = dht.readTemperature();

  if (isnan(*humidity) || isnan(*temperature)) {
    Serial.println("Failed to read from DHT Sensor");
    return(false);
  } else {
    return(true);
  }

}
static print_temperature_and_humidity(float* temperature, float* humidity){
    Serial.print( "T = " );
    Serial.print( *temperature, 1 );
    Serial.print( " deg. C, H = " );
    Serial.print( *humidity, 1 );
    Serial.println( "%" );  
}


void loop() {
  // Wait a few seconds between measurements.
  delay(2000);

  // Reading temperature or humidity takes about 250 milliseconds!
  // Sensor readings may also be up to 2 seconds 'old' (its a very slow sensor)

  float t;
  float h;

  if( measure_environment( &t, &h ) == true )
  {
    print_temperature_and_humidity(&t, &h);
  }
  
  if(h > 65){
      digitalWrite(LED_BUILTIN, HIGH);  // turn the LED on (HIGH is the voltage level)
  } else if(h < 60){
    digitalWrite(LED_BUILTIN, LOW);   // turn the LED off by making the voltage LOW
  }
}