DHT22 Sensor

The precision upgrade to the DHT11, using the same single-wire interface and the same library so it drops straight into existing code. It reads in tenths of a degree instead of whole degrees, covers sub-zero temperatures down to minus 40, and measures the full humidity range from 0 to 100 percent with roughly plus or minus 2 percent accuracy. Worth the extra cost for greenhouses, incubators, cold storage and any application where the numbers actually matter. Tenth-degree resolution versus whole degrees on a DHT11; Works below freezing, down to minus 40 C; Full 0-100% humidity range; Drop-in replacement, same wiring and library