The Sparkplug Plug-in has two triggers that complete the Subscribe principle.
Sparkplug Node Device Data
The Sparkplug Node Device Data Trigger is triggered when data changes. On the signal, the OPC Router as node receives the data via MQTT from the MQTT broker.
Sparkplug Command Trigger
The Sparkplug Command Trigger turns the OPC Router as application into a subscriber. The trigger is released when the MQTT broker has received new information. This information is then sent to the OPC Router.