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Note since we are using the 'Example Transmitter' of Ignition8 we also need to set the Group ID and Edge Node ID in the Example Transmitter. To do so, go to MQTT Transmission → Settings on the left Ignition Gateway Web UI navigation panel. Then select the 'Transmitters' tab as shown below:

Note that the 'Sparkplug IDs' are 'My MQTT Group/Edge Node c3420b' in this example. These exact values will be used for the EFM Emerson ROC connection Sparkplug parameters to tell the EFM Emerson ROC which MQTT Transmission Transmitter configuration to use and, in turn, which MQTT connection to use to send the alarm data on. So, to match the Transmitter configuration in this example, we must set the Sparkplug IDs in the Emerson ROC driver instance as shown below. Note the Group ID and Sparkplug ID are defined in the MQTT Transmission Transmitter configuration. The Device ID is being picked up from the Ignition default Tag Provider tag tree.

Next the MQTT Transmission server configuration must be modified to point to the Central Ignition Gateway we set up earlier.  To do so, in the Ignition Gateway Web UI browse to the Configure tab on the top and then to MQTT Transmission Settings in the lower left as shown below.

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