arduino › sensor module
aosong DHT22 Temperature/Humidity Sensor
Common upgrade from DHT11. Read interval is once every 2 seconds — sample faster and the library returns NaN. Single-wire protocol with internal pull-up needed (10k to VCC).
Specifications
- interface
- digital_1wire
- voltage v
- 3v3_or_5v
- library arduino
- DHT_sensor_library
- accuracy
- +/-0.5C, +/-2%RH
- range
- -40-80C, 0-100%RH
- pin count
- 3
Sources
- SparkFun open product catalog · ingest 2026-05-06
- Adafruit open product catalog · ingest 2026-05-06