ICP DAS WISE User Manual
http://wise.icpdas.com
139
connect to the Broker or not. If the Broker does not require
Client ID for the connection, this field can be ignored.
ix
If the SSL/TLS encryption mechanism is required for the
connection between the Broker and the WISE via MQTT, click
the “Enable” checkbox of the “Encryption” field to enable this
function.
x
The value in “keep alive Time” field defines the maximum time
that should pass without communication between the WISE and
the Broker. The WISE will ensure that at least one message travels
across the network within each keep alive period. In the absence of
a data-related message during the time period, the WISE sends a
very small MQTT “ping” message, which the Broker will
acknowledge. The keep “alive interval” enables the WISE to detect
when the Broker is no longer available without having to wait for
the long TCP/IP timeout. The unit of the value is second.
xi
To verify whether your Broker setting is correct, click “Testing” in
the “Connection Test” section, then WISE will try to connect to the
Broker and reply the connection status.
xii
Click the “Enable” checkbox in the “Last Will” field to allow the
Broker to send the alarm Topic to other MQTT client devices when
WISE lost connection to the Broker. After clicking the “Enable”
checkbox, the setting of Last Will Topic, Message content and QoS
will be brought up.
xiii
The value in “Periodical Publish Interval” field defines the time
interval (in second) to send all Publish Topics with the “Periodical
Publish” attribute automatically and periodically. If the value of
the “Periodical Publish Interval” field is 0, it means the “Periodical
Publish” operation is disabled.
xiv
The “Topic Prefix” field is for setting up a string as Topic Prefix.
The prefix can be used in the Publish Topic or Subscribe Topic to
simply the Topic editing. The default string of the “Topic Prefix”
will be the model name of the WISE. If there are more than one
WISE controllers in a system for MQTT connection, please
remember to change the “Topic Prefix” setting to distinguish the
