4G_2G DTU Products Function
http://www.iotworkshop.com - 19 -
Figure 19. Transparent Transmission Mode Heartbeat Packet Function Transmission
1.5. Multi-Socket Communication Function
The module supports max 3 sockets for simultaneous communication, and each channel can set
serial port channels. In the multi- TCP link connection mode, data from TCP will be forwarded one by
one to the serial port. The data coming from the serial port will be copied into multiple copies and
forwarded on each TCP link. The specific operation is as follows:
Figure 20. Multi-Socket Communication Transmission
1.6. Multi-Socket Data Differentiation Function
In the multi-Socket application process, user can specify the serial port data to be sent to a
specific Socket channel. The data received by the Socket will also be added with the channel tag, so
that the serial port can determine which channel sends the data. For details, see: AT+NETPIDEN and
AT+NETPID command.
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