This guide provides a brief overview of the CH-D1 Wireless DTU, its purpose, and important safety warnings. It explains that the device must not be used near explosive areas, medical equipment, aircraft, or any environment where radio interference could cause hazards.
The manual describes how to configure the DTU using AT commands, set up TCP/UDP communication modes, adjust baud rates, and monitor hardware/software traffic. It also includes basic troubleshooting steps and contact information for Chonghan Technology. This manual is written in Chinese.
| Baud rate | 9600 8N1 |
|---|---|
| Frequency band | EGSM 900MHz |
It must not be used in explosive operation areas, near medical or life‑support equipment, on aircraft, or any place where radio interference could affect other devices.
Set the serial port parameters to 9600 baud, 8 data bits, no parity (8N1) as shown in the manual.