SmartFlex
7.4 Serial Gateway
Figure 96: Serial Gateway – sample topology
The router’s serial gateway function lets you establish serial connectivity across the Internet
or with another network. Serial devices (meters, PLC, etc.) can then upload and download
data. (See Fig. 96.) To use this function the router model must have a serial interface (port).
Options include RS232, RS485-232 or RS232-485-ETH.
Configuration is done in the Configuration section, Mobile WAN, with the Expansion Port 1
item (or Expansion Port 2, for RS422 and RS485). In this example, the router is equipped with
an RS232 interface (port).
Mobile WAN configuration Mobile WAN configuration is the same as in the previous ex-
amples. Just insert the SIM card into the SIM1 slot at the back of the router and attach the
antenna to the ANT connector at the front. No extra configuration is needed (depending on
the SIM card used). For more details see Chapter 4.3.1.
Expansion Port 1 configuration The RS232 interface (port) can be configured in the Con-
figuration section, via the Expansion Port 1 item. (See fig. 97.) You will need to enable the
RS232 port by checking Enable expansion port 1 access over TCP/UDP. You may edit the
serial communication parameters (not needed in this example). The important items are Pro-
tocol, Mode and Port. These set the parameters of communication out to the network and
the Internet. In this example the TCP protocol is chosen, and the router will work as a server
listening on the 2345 TCP port. Confirm the configuration clicking the Apply button.
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