For sensors you want to group, but are from unfamiliar channels.
From the create/edit dashboard window > Query (as seen above)
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In query Window A, set the initial channel you want to pull
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Toward the top of that same section, click Add Query to add another similar, but unrelated sensor.
In my example, I group both Windows VMs and Linux machines available memory, as they both have the same destination channel, "Percent Available Memory"
Some sensors have different names, but return the same values. For example, some Linux devices have:
- Memory: Physical Memory
- Memory: Physical memory
To ensure I don't miss any, I regex the query, by wild-carding the sensor: /Memory\: Physical */ -- that way, even if the underlying query is case-sensitive, all of my desired sensors will get pulled in.
If the sensors are named entirely different, you can rename them. The Grafana plugin should pick up any changes on the next refresh.