
USR-G760c User Manual
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Figure 4. Function Diagram
3.1. Parameters Setting
Power on, module will connect to the server, get into working mode and open serial port according to
pre-set parameters.
Preset parameters
Work mode
SMS transparent transmission mode/Network transparent transmission mode/Httpd client mode
Default connection parameters
Protocol
Destination IP
Destination Port
Serial parameters
Baud rate
Data bit
Parity bit
Stop bit
After setting above parameters, restart the DTU, it will work under your settings. Following chapters will
introduce each section.
3.2. Work Mode
There are 3 work mode in total:
SMS transparent transmission mode,
Network transparent transmission mode
Httpd client mode
3.2.1. SMS Transparent Transmission Mode
In this mode, users’ serial device can send SMS to cell phones. Or DTU receive the SMS by any phone
and forward the SMS to serial device.
No need to pay attention to the data conversion process between serial data and SMS, users can realize
transparent transmission between cell phone and serial device by simple settings.
<Note>
Data Transparent Transmission means, in the process of transmission, DTU will NOT do any conversion
on data, just clear transmission. Below is the same.
Setup by AT commands
1. Set work mode to be SMS transmit mode: AT+WKMOD=SMS
2. Set destination phone number: AT+DSTNUM=15866668888
3. Set filter SMS source phone number: AT+SMSFLT=ON
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