ioThinx 4510 Series Software Tools
Last Will Topic: The “topic” of the last will message that will be sent to the broker. This item is not
configurable.
Last Will Message: The message that will be sent to the broker when the connection between the ioThinx
4510 and the broker is disconnected. This item is not configurable.
Last Will QoS: The ioThinx supports three QoS levels:
• QoS 0 (at most once): Data is delivered without acknowledgement. This level of QoS provides best-effort
delivery but without guarantee.
• QoS 1 (at least once): Data is delivered with acknowledgement. In this case, when the ioThinx 4510
sends data, it expects to receive an Ack back from broker. With this level of QoS, data may be delivered
multiple times.
• QoS 2 (exactly once): Data is delivered exactly once using a “four-part-handshake”. This level of QoS is
the most reliable, but is generally slower than QoS 0 and QoS 1.
Retained: The broker will save messages that are not delivered to a subscriber who is offline when the
message is first delivered, and then resend the message when the subscriber comes back online.
Topic Settings
All the topics provided by the ioThinx 4510 will be listed here. The topics are default disabled. User needs to
select which topics are needed to be enabled. The topic which can be published or subscribed are listed in
the page Publication or Subscription, respectively.
Filter: The ioThinx 4510 has a filter function in the top right corner of the subscribe page that allows users
to find topics more easily. Click the Value/Attribute/Enable/Disable buttons and then type a keyword to
find a topic within several seconds. The number of filtered topics will be shown as well.
Value/Attribute: The following most frequently used IO data will be filtered by Value. Other IO data,
which is not listed, will be filtered by Attribute.
• diStatus
• diCounterValue
• diCounterStauts
• doStatus
• doPulseStatus
• relayStatus
• relayCurrentCount
• aiStatus
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