DHT22 AM2302 Digital Temperature and Humidity Sensor

The DHT22 covers the same basic job as a DHT11 - digital temperature and humidity in one sensor - at meaningfully better numbers on both axes: temperature accuracy tightens to plus or minus 0.5C from the DHT11's plus or minus 2C, and the measurable range extends down to -40C rather than stopping at 0C, which matters for any outdoor or cold-environment monitoring the DHT11 simply cannot handle.

A single-bus digital interface keeps wiring identical to the DHT11's three-pin pattern, so upgrading from one to the other in an existing project is a drop-in swap rather than a rewiring job, with most Arduino DHT libraries already supporting both sensors interchangeably. Comes with jumper cables pre-attached, so it wires directly to a breadboard without separately sourcing leads.

Suited to outdoor weather stations, greenhouse monitoring needing sub-zero range, and any project where the DHT11's coarser accuracy or narrower temperature range is the limiting factor.