   Serial.print  ("Resolution:   "); Serial.print(sensor.resolution); Serial.println(" *C");  
   Serial.println("------------------------------------");
   // Print humidity sensor details.
-  dht.humidity().getSensor(&sensor);
+  dht_array[0]->humidity().getSensor(&sensor);
   Serial.println("------------------------------------");
   Serial.println("Humidity");
   Serial.print  ("Sensor:       "); Serial.println(sensor.name);

}

void loop() {
  // Delay between measurements.
  delay(delayMS);
  // Get temperature event and print its value.
  sensors_event_t event;  
  dht.temperature().getEvent(&event);
  if (isnan(event.temperature)) {
    Serial.println("Error reading temperature!");
  }
  else {
    Serial.print("Temperature: ");
    Serial.print(event.temperature);
    Serial.println(" *C");
  }
  // Get humidity event and print its value.
  dht.humidity().getEvent(&event);
  if (isnan(event.relative_humidity)) {
    Serial.println("Error reading humidity!");
  }
  else {
    Serial.print("Humidity: ");
    Serial.print(event.relative_humidity);
    Serial.println("%");
  }
}

#include <DHT.h>
#include <DHT_U.h>

#define DHTPIN1            2         // Pin which is connected to the DHT sensor.
#define DHTPIN2            3         // Pin which is connected to the DHT sensor.

#define N_SENSORS   2   //!< The number of sensors used
// Uncomment the type of sensor in use:
//#define DHTTYPE           DHT11     // DHT 11 
#define DHTTYPE           DHT22     // DHT 22 (AM2302)
//#define DHTTYPE           DHT21     // DHT 21 (AM2301)


// See guide for details on sensor wiring and usage:
//   https://learn.adafruit.com/dht/overview

DHT_Unified *dht_array[N_SENSORS];

uint32_t delayMS;

void setup() {
  Serial.begin(9600); 
  // Initialize device.
  Serial.println("DHTxx Unified Sensor Example");

  dht_array[0] = new DHT_Unified(DHTPIN1,DHTTYPE);
  dht_array[1] = new DHT_Unified(DHTPIN2,DHTTYPE);
  dht_array[0]->begin();
  dht_array[1]->begin();
  // Print temperature sensor details.
  sensor_t sensor;
  dht_array[0]->temperature().getSensor(&sensor);
  Serial.println("------------------------------------");
  Serial.println("Temperature");
  Serial.print  ("Sensor:       "); Serial.println(sensor.name);
