9
following figure:
4.
4G DTU
socket
communication parameter configuration
Select the serial communication main server configuration page , the configuration
process is as follows:
Choose a communication protocol
Set the server address and port number. The server address can be a fixed IP
address or a dynamic domain name.
Select the server connection method
The working mode of the DTU can be selected as constant mode or manual
mode .
Constant connection mode means that after the DTU is powered on, it
automatically connects to the pre-set server, and reconnects immediately after
disconnection;
manual mode means that after the DTU completes startup, the serial port enters
the AT command mode, which can realize SMS sending and receiving or other
needs to respond Application scenarios of AT commands.
