Dot-notation paths
Reach into nested objects with dots and into arrays with numeric indices:Core fields
The Map view needs a device ID and coordinates; everything else is optional.Extra display fields
Any payload key can surface in the marker popup and detail panel — add an extra field with a label and a path (Passengers → meta.passengers, Battery → telemetry.battery).
Same widget, four payloads
Back to Fleet overview
The six views and the data contract.

