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MQTT Recorder requires that a database be set up in Ignition. That can be done as described in the 'Connect to a Database' section here.  Note Ignition supports additional database types.  For more detailed information about supported types, take a look at the information provided here.  Once a database is set up, MQTT Recorder can be configured.  Do so by opening the Ignition Gateway Web UI and browsing to the Configure tab at the top of the screen and then selecting 'MQTT Recorder → Settings' as shown in the lower left below.

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MQTT Transmission is connected to the MQTT Server and as a result MQTT Engine is receiving tag change events.  In addition, because an EFM Emerson ROC device has been created and configured with the same Sparkplug Group ID, Edge Node ID, and Device ID, events will also be pushed to the MQTT server as Sparkplug RECORD objects.  When event are discovered by the EFM Emerson ROC driver, they will be published to the MQTT server, consumed by MQTT Engine, passed on to MQTT Recorder, and then inserted into the specified database.  Below is an view of some event records using a third party database viewing tool.

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