Wiznet WIZ108SR User Manual page 16

Gateway module

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number should be set. If server IP had domain name, use DNS function.

In TCP Client mode, WIZ108SR can actively establish a TCP connection to a host computer

when power is supplied.

The Data transmission proceeds as follows:

1. As power is supplied, WIZ108SR board operating as TCP client mode actively

2. If the connection is complete, data can be transmitted in both directions – from the

In this mode, WIZ108SR normally operates as TCP Server and waits for the connection

request from the peer. However, if WIZ108SR receives data from the serial device before

connection is established, it changes to the client mode and sends the data to the server

IP. Therefore, at the mixed mode, the server mode is operated prior to the client mode.

As like TCP Server mode, the Mixed mode is useful for the case that the monitoring

center tries to connect to the serial device (in which WIZ108SR is used) to check device

status. In addition to this, if any emergency occurs in the serial device, the module will

change to Client mode to establish the connection to the server and deliver the

emergency status of the device.

UDP is not a connection oriented protocol. But the communication port should also be

defined well. If the UDP mode is selected, the data from serial interface can be defined

where to delivery via the "Sever IP Address" and "Port", and the WIZ108SR can also be

defined where to receive Ethernet data from via the "Remote Peer IP Address" definition.

If the data destination and source are the same, the two IP address will also be the same.

Please note the destination and source are using the same port.

12) DDNS Setting

DDNS function is not supported in the WIZ108SR.

WIZ108SR User Manual

Arrow.com.

Downloaded from

establishes a connection to the server.

host to the WIZ108SR and from WIZ108SR to the host

(WIZnet Co., Ltd.)

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