The DHT11 digital temperature and humidity sensor datasheet from Guangzhou Aosong provides specifications, interface details, electrical characteristics…
The DHT11 is a calibrated digital temperature and humidity sensor that outputs data via a single‑wire serial interface. It integrates a resistive humidity element, an NTC temperature element, and an 8‑bit microcontroller, offering low power consumption and a compact 4‑pin package.
The document details performance parameters, recommended wiring, power supply requirements, pin definitions, and handling precautions, making it suitable for HVAC, automotive, data logging, consumer electronics, and other applications. This manual is written in Chinese.
| Humidity measurement range | 20‑90 % RH |
|---|---|
| Supply voltage | 3‑5.5 V |
| Average supply current | 0.2‑1 mA |
| Standby current | 100‑150 µA |
| Humidity resolution | 1 % RH (8 bit) |
| Temperature resolution | 1 °C (8 bit) |
| Response time | 6‑30 s |
The sensor operates from 3 V to 5.5 V.
After power‑up, wait 1 second for the sensor to leave the unstable state.
Use a 5 kΩ pull‑up resistor for wiring lengths under 20 m.
The sensor can reliably communicate up to about 20 m; longer runs may need a different pull‑up resistor.