This document describes the features and characteristics of the wireless data transmission device and its usage method
This quick start guide introduces the ZLG ZWG-21B GPRS wireless data transfer device and shows how to get it up and running for basic data transmission tests. It outlines the purpose of the device, the required accessories, and safety notes.
The guide walks the user through checking the antenna, installing the SIM card, connecting power and communication cables, installing the USB driver, and performing basic send/receive operations. It also points to the full user manual for detailed configuration and troubleshooting. This manual is written in Chinese.
| Communication interface | RS‑485 (+12 V) and Mini‑USB |
|---|---|
| Power indicator | Red LED (PWR) lights when powered |
Open the device packaging and inspect the antenna; if it is loose, tighten it before proceeding.
Insert a SIM card that has GPRS service enabled, do not insert or remove it while the device is powered, and back up any important messages beforehand.
Unplug the power adapter, verify that the adapter is supplying power and that the polarity of the power terminals is correct, then reconnect.
Plug the Mini‑USB cable into the PC; Windows will detect new hardware and you should follow the driver installation wizard, ensuring the driver path points to the XR21V1410 files.