Adding measurements to an MQTT (JSON) collector

once the collector is connected, you can add one or more measurements a measurement defines how data from a subscribed topic is mapped into historian to create a new measurement manually, go to the measurements page in historian and click + create measurement you can find jsonpath documentation online, and https //jsonpath com is a useful tool to quickly test expressions against sample messages before configuring them in historian example configuration assume your broker publishes the following json message on topic factory/machine1/metrics { "temperature" 23 5, "pressure" 1012, "status" "good", "ts" "2025 09 18t09 45 00z" } you can configure a measurement with measurementpath $ temperature timestamppath $ ts statuspath $ status tagnamesandtagvaluepaths {"machine" "$ machineid"} if the timestamp is in unix format, set timestamplayout to unix, unixmillis, unixmicros, or unixnanos otherwise rfc3339 is assumed expected outcome the measurement status changes to good within a few seconds live values appear in the data preview panel the measurement shows up in the configured measurements list