RHT03 (DHT22) Humidity and Temperature Sensor Hookup Guide
Contributors:
bboyho
bboyho 
Hardware Hookup
Heads up! The sensor's pins are small. For a more secure connection, you may want to think about eventually soldering this to a protoboard after prototyping.
Connect the RHT03 to your Arduino as shown below. Since we are using a 5V Arduino, we will be using 5V to power the sensor. If you are using a 3.3V Arduino, you will need to connect it to a 3.3V pin for your respective development board.
Note: A 10k pull-up resistor can be added to the data pin, though it seems to work without it. If you really need, you can still add a pull-up resistor between VCC and the data pin.
Head's Up! The Fritzing part for the RHT03 (DHT22) can be found in the Fritzing software! Simply type RHT03 in the parts search.