WIZ107SR User Manual (WIZnet Co., Ltd.)
address is successfully acquired from DHCP server, the MAC address will be displayed on
the configuration window. (It takes some time to acquire IP address from DHCP server)
When a module on the board list is selected, IP address, Subnet mask and Gateway are
displayed. If module could not acquire network information from DHCP server, IP
address, Gateway Address and Subnet mask will be initialized to 0.0.0.0.
11) Network Operation Mode
Client / server / mixed : This is to select the communication method based on TCP. TCP is
the protocol to establish the connection before data communication, but UDP just
processes the data communication without connection establishment. The Network mode
of WIZ107SR can be divided into TCP Server, TCP Client and Mixed mode according to the
connection establishing method. At the TCP server mode, WIZ107SR operates as server on
the process of connection, and waits for the connection trial from the client. WIZ107SR
operates as client at the TCP Client mode on the process of connection, and tries to
connect to the server’s IP and Port. Mixed modes supports both of Server and Client. The
communication process of each mode is as below.
<TCP server mode Communication>
At the TCP Server mode, WIZ107SR waits for the connection requests.
TCP Server mode can be useful when the monitoring center tries to connect to the device
(where WIZ107SR is installed) in order to check the status or provide the commands. In
normal time WIZ107SR is on the waiting status, and if there is any connection request
(SYN) from the monitoring center, the connection is established (ESTABLISH), and data
communication is processed (Data Transaction). Finally connection is closed (FIN).
In order to operate this mode, Local IP, Subnet, Gateway Address and Local Port Number
should be configured first.
The Data transmission proceeds as follows,
1. The host connects to the WIZ107SR which is configured as TCP Server mode.
2. As the connection is established, data can be transmitted in both directions – from the
host to the WIZ107SR, and from the WIZ107SR to the host
<TCP client mode Communication>
If WIZ107SR is set as TCP Client, it tries to establish connection to the server.
To operate this mode, Local IP, Subnet, Gateway Address, Server IP, and Server port
number should be set. If server IP had domain name, use DNS function.