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AUTOSOL MQTT supports Sparkplug B v2.2. |
This object links to a Broker Connection to publish all data collected by Edge ACM in Sparkplug B format.
General
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Property |
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Description |
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Name |
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The name of this item |
Enabled |
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When enabled, data will be published |
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Folder | The parent folder |
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MQTT
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for this item |
MQTT
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Property | Description | ||
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Broker Connections | The Broker Connection objects used by this Sparkplug B Publisher object.
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Assigned Schedules | The Publish Schedules that are associated with this publisher. AUTOSOL MQTT will only publish tags that match the publish group id’s assigned to these schedule objects. | ||
Publish QoS | The Quality of Service for published messages
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Subscribe QoS | The requested Quality of |
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Service for subscribed messages (typically tag value writes from remote clients)
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Broker Connection
The Broker Connection object used by this Sparkplug B Publisher object
Sparkplug B
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Default Publish Rate | The time between data update messages
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Sparkplug B
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Property | Description |
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Group ID | The Group ID used in the Sparkplug B message |
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. This is a name that can be shared by multiple devices so |
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clients can more easily group |
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published data. | |
Node ID | The identifier used in the Sparkplug B message |
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Primary Host ID | Optional. The Host ID the publisher expects to be receiving data. If a value is provided, the publisher will stop when the expected Host is offline then resume publishing and backfill when the Host comes online |
Disable Tag Aliases | When Tag Aliases are disabled, the full tag name will be sent with each update of tag values. This can be useful for clients that missed the |
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BIRTH notice or to manually read data |
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Backfill
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Description | |
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Backfill to Disk | Enable storing Backfill data on disk instead of in RAM. On most devices this will allow more storage. |
Disk Location | The location on the Linux system that backfill data will be stored. |
Disk Memory Allocated for Buffered Values (mb) | The maximum amount of backfill data to be stored on the disk. |
Split Backfill Messages |
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If enabled, backfill messages will be divided up and sent in chunks, rather than |
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being sent a single large |
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DDATA message. | |
Tag Values per Message | When splitting the backfill message, set the maximum number of tag values sent per message |
Advanced Sparkplug
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Property | Description |
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Payload |
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On QoS 1 or 2 this will force eACM to republish the most recentl sent message if it lost the broker connection without confirmation that the message was received
Serialize Publishing
On QoS 1 or 2 ensures packages are published in sequence and only after the previous message receipt is confirmed
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Compression | If selected, outgoing payloads will be compressed before being sent to the broker. There are 2 compression algorithms available
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Publish Arrays As | If arrays of data are being published in the metrics, this option will determine how the array is published. The ‘String’ option will publish your data as a comma separated string value, the ‘Dataset’ option will publish your data in a single column dataset, and the ‘ByteValueArray’ will publish your data in its base64 byte value representation. |
Include Tag Quality in Metrics | If checked, the tag quality of each tag will be published in the metric alongside the value of each tag |
Include backfill in Birth Message | If checked, all backfill data will be sent in the DBIRTH message instead of the first DDATA message |
Include Node Name in the Node Birth (NBIRTH) message | If checked, an internal string tag will be published in the NBIRTH message with the value matching the node name of this install |
Include Node IP address in the Node Birth (NBIRTH) message | If checked, an internal string tag will be published in the NBIRTH message with the value matching the IP address of this node |
Out of Schedule Publish allowed | When checked, if a majority of tags in a device have a quality change, then an out of schedule publish will take place. This allows the publisher to send DDEATH and DBIRTH messages when it loses and regains connection to an end device. If set to false device messages will be limited to only publish at scheduled times. |
Delay Between Births | The minimum amount of time to wait between rebirth messages, if a rebirth request is issued |
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during the delay the next birth message will not be sent until after the |
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delay | |
Publish Device Death | When enabled, DDEATH messages will be published when an end device loses connection |
Advanced MQTT
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Property |
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Description |
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Delay Between Publishes |
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The time |
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between published messages |
Info
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Information on the installed version of this object
MQTT Topic Examples
For the following example, eACM is collecting data from a device named “Device1”.
AUTOSOL MQTT’s SparkplugB publisher has a GroupID of “LocalGroup” and NodeID of “FirstNode” (set on the SparkplugB tab).
What topics shoudl appear in the broker?
When the publisher first starts, there will be a node birth:
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spBv1.0/LocalGroup/NBIRTH/FirstNode |
Followed by a birth message for our device(s). These will contain the initial values for all of the tags associated with each device:
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spBv1.0/LocalGroup/DBIRTH/FirstNode/Device1 |
Finally, in the course of normal operation, there will be a series of data messages at a rate defined by the Publish Interval in the device object, assuming any tag’s value has changed within that interval:
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spBv1.0/LocalGroup/DDATA/FirstNode/Device1 |
If communications are lost, or AUTOSOL MQTT is stopped, a node death message will arrive, signalling to all subscribers that the node is down:
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spBv1.0/LocalGroup/NDEATH/FirstNode |
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