The AOSONG AHT30 manual provides specifications, wiring, and usage instructions for the temperature‑humidity sensor.
This manual describes the AHT30 temperature‑humidity sensor, its low‑power operation, high accuracy, and compact SMD package. It includes performance tables for humidity and temperature, electrical characteristics, and recommended PCB layout and soldering guidelines.
The document also covers interface definitions, I²C communication protocol, measurement procedures, CRC checking, environmental stability advice, packaging details, safety warnings, and warranty information for end‑users and designers. This manual is written in Chinese.
| Supply voltage | 2.2‑5.5 V |
|---|---|
| Supply current (sleep) | 0.2 µA |
| Supply current (measurement) | 570‑600 µA |
| Power consumption (measurement) | 1.8‑1.9 mW |
| Humidity resolution | 0.024 %RH |
| Humidity accuracy (typical) | ±3 %RH |
| Humidity response time (τ63%) | <8 s |
| Temperature resolution | 0.01 °C |
| Temperature accuracy (typical) | ±0.5 °C |
| Operating temperature range | -40 to 120 °C |
| Humidity range | 0‑100 %RH |
After power‑up, send the write measurement command 0x70 0xAC 0x33 0x00 and wait about 80 ms before reading the data.
Use an external pull‑up resistor of about 2.0‑4.7 kΩ to bring the lines to the high level.
No, the manual warns against using the sensor in safety protection or emergency‑stop equipment because it may cause personal injury.