Radial Gauge

The Radial gauge is a general-purpose circular dial widget with no preset units, title, or scale colors. It renders a full-arc gauge face with a sweeping needle, configurable tick range, and a digital value readout at the bottom — ready to represent any numeric telemetry key out of the box.

Use it when none of the purpose-built gauges fit your measurement — for example, displaying pressure in bar, humidity in percent, battery voltage, tank fill level, or any other sensor reading where you want the familiar, instantly-readable look of an analogue dial without being locked into a specific visual theme.

Open the dashboard in edit mode. Click Add widget in the top toolbar, or click the Add new widget icon in the center of an empty dashboard.
In the widget bundle selection dialog, find and click Analogue gauges.
Select the Radial gauge widget.
Configure the datasource and appearance, then click Add.

Configuration

All settings in this section use Basic mode — a quick-start configuration covering the essentials. For finer widget controls like title font, card style, and tooltip, switch to the Advanced tab.

Datasource

Select the source of the value to display:

Device — a specific device; the gauge displays the latest telemetry value from this device.
Entity alias — a set of entities matched by an entity alias; use this when the target device is selected dynamically at runtime.

Add exactly one data key — the telemetry key whose value the gauge will display.

Gauge appearance

Controls the visual elements of the dial face.

Setting	Description
Units title	Toggle to show or hide a label displayed in the center of the dial. No default text is set — enter any label that describes the measurement (for example, `Pressure` or `Humidity`). Set color and font.
Units	The unit string displayed on the dial. No default is set — enter the appropriate unit for your data (for example, `bar`, `%`, or `V`). Set color and font. Click the settings icon to configure unit conversion — see Unit conversion.
Value	Toggle to show or hide the digital readout at the bottom of the dial. Set the number of digits and the text color and font.
Ticks	The minimum and maximum values displayed on the scale (default: `−100` to `100`). Adjust to match the expected range of your telemetry. Set tick label color and font.
Arrow and scale default color	The color of the needle and the scale arc.
Plate color	Background fill color of the gauge face.
Scale colors	Toggle to enable color zones on the scale arc. Disabled by default — when enabled, click the color swatch to open the Color settings dialog and define value ranges with individual colors.

Card appearance

Setting	Description
Background color	Solid color background for the widget card.
Show card buttons	Toggle Data export and Fullscreen buttons in the widget header.
Card border radius	Corner rounding in pixels.

Actions

The Radial gauge supports the Widget header button action — a button placed in the widget header that triggers a configured action when clicked.

Troubleshooting

Gauge shows no data

Cause	Solution
Wrong data key name	Confirm the key name matches the telemetry key sent by the device. Key names are case-sensitive.
Device not sending data	Open Devices → Latest telemetry and check for recent values. If empty, verify the device transport configuration and access token.
Entity alias resolves to no entities	Open Entity aliases in the dashboard and verify the alias returns results.

Needle is pegged at the minimum or maximum

Cause	Solution
Ticks range too narrow	Adjust the Ticks min and max values to cover the actual range reported by the device.
Wrong telemetry key selected	Confirm the data key matches the key your device actually reports.

Value shows as N/A or stops updating

Cause	Solution
Device has stopped sending telemetry	Check device connectivity and the last activity timestamp in Devices → Latest telemetry.
Wrong datasource entity selected	Verify the correct device or alias is selected in the datasource configuration.