Axis Q3527-LVE User Manual page 43

AXIS Q3527-LVE Network Camera
The web interface
The Last Will Testament (LWT) lets a client provide a testament along with its credentials when connecting to the broker. If the
client disconnects ungracefully at some point later (maybe because his power source died), it can let the broker deliver a message
to other clients. This LWT message has the same form as an ordinary message and gets routed via the same mechanics.
Send message: Turn on to send messages.
Use default: Turn off to enter your own default message.
Topic: Enter the topic for the default message.
Payload: Enter the content for the default message.
Retain: Select to keep the state of client on this Topic
QoS: Change the QoS layer for the packet flow.
MQTT publication
Use default topic prefix: Select to use the default topic prefix, that is defined in the device topic prefix in the MQTT client tab.
Include topic name: Select to include the topic that describes the condition in the MQTT topic.
Include topic namespaces: Select to include ONVIF topic namespaces in the MQTT topic.
Include serial number: Select to include the device's serial number in the MQTT payload.
Add condition: Click to add a condition.
Retain: Defines which MQTT messages are sent as retained.
• None: Send all messages as non-retained.
• Property: Send only stateful messages as retained.
• All: Send both stateful and stateless messages as retained.
QoS: Select the desired level for the MQTT publication.
MQTT subscriptions
Add subscription: Click to add a new MQTT subscription.
Subscription filter: Enter the MQTT topic that you want to subscribe to.
Use device topic prefix: Add the subscription filter as prefix to the MQTT topic.
Subscription type:
• Stateless: Select to convert MQTT messages into a stateless message.
• Stateful: Select to convert MQTT messages into a condition. The payload is used as the state.
QoS: Select the desired level for the MQTT subscription.
MQTT overlays
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