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In this example, we’re going to track the distribution of messages by MSH-4 (Sending Facility) and create both pie and line charts. Let’s assume the following channel, which receives messages over a network.
We want our device to track the value from MSH-4 (sending facility). To do this, add a new line item by clicking the Add Metric button:
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Next, double-click in the Name column and enter SendingFacility. This is the label used in Prometheus/Grafana. Next, enter the HL7 path into the Expression column.
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Ensure the HL7v2 metric is enabled, and run some messages through the test channel.
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You should be able to visit Grafana and create the following visualizations: