Auxiliary Operations
XW-210 WiFi™ Users Manual
means that the XW-210 can be installed using DHCP. In addition, no special router configuration is
required. This makes the network installation of the XW-210 very simple, and since no incoming ports
need to be opened in the router, security is not compromised. See S
ection 4.2: WiFi Networks Ta
b for
more information.
The XW-210 can be configured to establish a connection when triggered by an event, such as a I/O state
changing. This is done by setting the
Remote Service
checkbox in the I/O setup tabs.
When an event occurs and a connection is open, the state.xml file is sent.
If a connection is not open and
Remote Services
is enabled, a connection will be established by sending
the connection string. Once the connection is established state.xml will be sent.
In version 2.0 of the protocol, it is required for the server to send back an acknowledgment packet after
every connection string message received. The server does this by sending a 3 byte packet back
containing the string 'ACK'. Additionally, version 2.0 of the protocol introduces the use of SSL client
certificates for authentication and encryption.
6.3.5 Connection String
With
Remote Services
enabled, a connection attempt will be made periodically according to the
Connection Interval setting in the
Advanced Network
setup tab. The Connection String is a user-defined
character string configured in the
Advanced Network
tab.
The connection string is also sent at the same interval once the connection is open. The external server
is responsible for closing the connection when it is done.
In version 2.0 of the protocol, each connection string is prepended with the connection string type, MAC
address, model number code and connection interval.
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Xytronix Research & Design, Inc.
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