AM2302 / DHT22 Humidity and Temperature Sensor

The DHT22 is a high accuracy humidity and temperature sensor with a precision of ± 0.5°C in temperature and ca. 2% in humidity readings. The sensor can be accessed by a single digital input. On the other hand, a good timing is needed to read the sensor values. That's why the use of an existing external library for Arduino is recommended. 

Specification: