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In MQTT Transmission and MQTT Engine support was added to transmit alarm events from the Edge (MQTT Transmission) to the Central Gateway (MQTT Engine) . They also now support acknowledgements from the Central Gateway (MQTT Engine) back to the Edge (MQTT Transmission).

Note

The Alarm Event Propagation implementation is limited as detailed below:

  • The only alarm properties that are currently propagated are: Name, Priority and Notes.
  • Alarms over the GAN from an Engine gateway where alarms were forwarded over MQTT from Transmission is not currently supported
  • Alarm pipelines and notifications exposed across MQTT along with alarm data is currently not supported
  • Alarm Status Table filtering to a Sparkplug Group/Edge and/or Device ID is not fully supported
    • In release 4.0.28 Sparkplug IDs were added to the source and display path of alarms at MQTT Engine to allow for Alarm Status Table filtering to Sparkplug IDs
    • From release 4.0.28 onward, MQTT Engine supports explicitly inserting alarm events into the Alarm Journal on arrival


To configure alarm event propagation from Transmission to Engine, follow these steps:

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