Supporting code snippets for http://everydaylifein.net/iot/arduino-dht-sensor-protocol.html

DHT22ArduinoSample.cpp

#include <DHTSensor.h>
DHTSensor sensor(3);//Will be using pin3 for collecting the data
void loop()
{
        DHTSensorMeasurement re = sensor.Read();
        if (!re.HasError())
        {
            Serial.print("H: ");
            Serial.print(re.Humidity());
            Serial.print(" T: ");
            Serial.print(re.TemperatureInCelsius());
            Serial.print(" T(F): ");
            Serial.print(re.TemperatureInFahrenheit());
            Serial.print(" T(K): ");            
            Serial.println(re.TemperatureInKelvin());
        }
}

PowerByPinConstructor.cpp

//Will be using pin3 for collecting the data and pin7 for powering up the sensor
DHTSensor sensor(3, 7);