Widget data keys

Widgets read the keys you configure. They do not invent sample values. If a widget shows empty or “No data”, check the key names on the device (Devices → attributes / telemetry keys) match the widget settings.

Common patterns

Widget family	Typical keys	Notes
Charts / KPI / LED / gauges	One or more telemetry keys (temperature, voltage, …)	Bind device or alias + key
Map / route	Location telemetry (lat/lon or a location object)	Needs a recent stored or live point
GPIO control / status	Channel keys or command keys	Status uses latest telemetry; control sends commands
Slider / attribute form	Shared attribute keys	Slider writes and reads SHARED attributes
Toggle / switch	Telemetry feedback key + command method	Shows “No data” until a value exists (stored latest is loaded on open)
Generator monitoring	Generator telemetry set (fuel, RPM, voltage, …)	Must match your generator profile keys
Pool water quality	ORP, pH, free chlorine, temperature, …	Must match pool device keys
Drilling monitoring	Depth, RPM, pressure, …	Must match drill device keys
Factory / machine fleet	Runtime / state keys used by that solution	Follow the solution setup guide
Image / HTML / video	URL / HTML content	Not telemetry; bad URL = empty panel

After open

Widgets that used to wait for a live push now load the latest stored telemetry (and SHARED attributes for slider) when the dashboard opens, then continue with live updates.