The easiest way to track whether or not the Transmission Sparkplug MQTT client is online is by watching the Online tag for that specific Transmitter’s MQTT Client.
The tag path is
[MQTT Transmission]Transmission Info/Transmitters/TransmitterName/Edge Nodes/GroupId/EdgeId/MQTT Client/Online
where the TransmitterName, Group Id and Edgenode Id will be specific to your Transmitter configuration.
| This tag will only be created once the Transmitter establishes the initial connection. |