The Aosong DHT12 sensor manual provides specifications, wiring, and operation instructions for the digital temperature‑humidity sensor.
The DHT12 is a compact, low‑power digital temperature and humidity sensor that supports both standard I2C and a single‑wire interface. It offers calibrated output, high stability, and a 4‑pin package suitable for a wide range of applications such as HVAC, data loggers, and weather stations.
The manual details electrical characteristics, communication protocols, typical application circuits, and handling guidelines, including storage conditions, chemical exposure warnings, and warranty information. This manual is written in Chinese.
| Power consumption (measurement) | 800 µA |
|---|---|
| Humidity range | 20 %RH – 95 %RH |
| Humidity accuracy (typical @25 °C, 5 V) | ±5 %RH |
| Temperature range | -20 °C – 60 °C |
| Temperature accuracy (typical @25 °C, 5 V) | ±0.5 °C |
The DHT12 supports both a standard I2C bus and a single‑wire (ONE‑WIRE) interface, which can be freely switched by the user.
The I2C address of the DHT12 is 0xB8 (DEV SEL).
After power‑on, wait at least 2 seconds for the sensor to exit its unstable state before reading data.
Store the sensor at 10 °C–40 °C with relative humidity below 60 %RH.