This document introduces the features and characteristics of the AQ3485 network outdoor temperature and humidity transmitter produced by Guangzhou Aosong Electronics Co., Ltd, including high-quality digital integrated sensors, reliable single-chip processing circuits, strong resistance to chemical pollution, digital automatic calibration function, intuitive LCD display, etc. It is widely used in meteorology, national defense, scientific research, postal and telecommunications, chemical industry, environmental protection, medicine, hotels, grain storage, HVAC and other fields.
The AQ3485 is a network‑type temperature and humidity transmitter that uses a high‑quality digital sensor (AM2302) and a reliable microcontroller to convert -40 °C to 80 °C temperature and 0‑100 % RH humidity into standard MODBUS RS‑485 signals. It is compact, lightweight, and suitable for a wide range of applications such as meteorology, defense, research, chemical, environmental monitoring, and HVAC.
The manual provides product overview, mechanical dimensions, electrical connection diagrams, technical specifications, configuration steps, communication settings, data command formats, and common fault troubleshooting. It also includes software installation instructions for data acquisition. This manual is written in Chinese.
Set the baud rate by adjusting the two dip switches on the back of the PCB according to the desired rate table.
Verify that the power voltage is within the rated range and that the power cable is correctly connected.