Telemetry

Telemetry is time-series data a device reports — sensor readings and other numeric or discrete samples.

• A measurement point (measurement key) is one named signal; its meaning, unit and transform come from the bound device profile descriptors. The platform never invents units.
• Samples are addressable by device, point key and time, and power dashboards, charts and rules.

Telemetry is observed data; the device shadow holds current/desired state, and attributes hold relatively static metadata.