User`s manual

E
E
Appendix E IP Address Report Protocol
When the WE-2100T module is configured to obtain its IP address automatically as a DHCP
client, it sends a DHCP request over the network to find the DHCP server. The DHCP server
will then send an available IP address to the module with an expiration time. The module will
use this IP address until the expiration time has been reached. When the expiration time has been
reached, the process will repeat, and module will send another DHCP request to the DHCP server.
Therefore, a module may end up using more than one IP address while it is connected to the network.
To address this, the module has been designed to report its IP data to a specific IP address and port
number when it is not using a static or fixed IP address. The IP address report parameters may be
configured in the web console as shown below. In the Auto report to field, enter the IP address of
the PC that will receive the IP address reports.
IP Address Report Structure
The first 4 bytes of the module’s IP address report are the characters “MOXA”. The rest of the
report is composed of 9 items, with each item preceded by a 2-byte header indicating the item ID
and item length.
Header
(Item ID)
Header
(Item Length)
Item
(none) (none) “MOXA” (text string)