Small Left Meter

This widget belongs to the Traditional SCADA fluid system bundle — a collection of pipe segments, fittings, valves, pumps, and gauges designed for building fluid system diagrams on ThingsBoard dashboards. It renders a vertical scale gauge that maps a telemetry value to a configurable range, with color-coded warning and critical zones.

• Display a numeric value on a vertical scale gauge with configurable min and max range.
• Color-code the scale ticks and progress bar to reflect normal, warning, and critical states.
• Animate a blinking effect when the device is in critical state.
• Trigger a dashboard action when the widget symbol is clicked.
• Receive state data from device attributes, time series, alarm status, or dashboard state.

The widget connects to a single data source: either a Device or an Entity alias that resolves to a device. This device provides the telemetry or attribute values used to drive the widget’s visual state.

The SCADA symbol defines the visual shape of the widget. Each meter widget has a pre-selected symbol from the Traditional SCADA fluid system bundle. To use a different symbol, click Browse SCADA symbol from gallery and choose one from the library, or upload your own.

Behavior parameters define what the widget displays, driven by real-time data from the connected device. Each parameter supports the same set of actions — see Behavior configuration for the full list.

Parameter	Default	Values	Description
Value	Use time series 'waterLevel'	number	The numeric value mapped to the gauge scale.
Warning state	Use alarm status	True, False	Whether the component is in warning state.
Critical state	Use alarm status	True, False	Whether the component is in critical state.
Critical state animation	False	True, False	Whether to enable blinking animation when the component is in critical state.
On click	Do nothing	—	Action triggered when the user clicks the widget symbol.

Defines what happens when the user clicks the SCADA symbol on the dashboard. Select one action type from the list below.

• Do nothing

  The symbol is clickable but performs no action. Use while testing styles or as a placeholder.

• Navigate to new dashboard state

  Switches to a different view within the same dashboard, like opening a device details screen.

  Parameter	Description
  Target dashboard state	The state to open (required).
  Open right dashboard layout (mobile view)	Opens a side panel instead of replacing the view (mobile only).
  Set entity from widget	Passes the current entity to the target state.
  State entity parameter name	The key the entity is passed under.
  Dashboard state display option	Normal (same view), In separate dialog (popup), or In popover (inline overlay).

• Update current dashboard state

  Updates the context of the current view, like switching the selected device, without navigating away.

  Parameter	Description
  Target dashboard state	The state to switch to (optional).
  Open right dashboard layout (mobile view)	Opens a side panel on mobile.
  Set entity from widget	Passes the current entity to the updated state.
  State entity parameter name	The key the entity is passed under.

• Navigate to other dashboard

  Opens a completely different dashboard, like jumping from this system view to a global alarms view.

  Parameter	Description
  Target dashboard	The dashboard to open (required).
  Target dashboard state	The specific view to open within that dashboard.
  Open in a new browser tab	Opens the dashboard without leaving the current page.
  Set entity from widget	Passes the current entity to the other dashboard.
  State entity parameter name	The key the entity is passed under.

• Custom action

  Runs custom JavaScript on click to implement any behavior not covered by the built-in options. Use it to make HTTP requests, open custom dialogs, call other widget APIs, or interact with external services. The function receives: $event, widgetContext, entityId, entityName, additionalParams, entityLabel.

• Custom action (with HTML template)

  Same as Custom action, but also renders a custom HTML panel or dialog when the symbol is clicked. The function receives an additional htmlTemplate parameter: $event, widgetContext, entityId, entityName, htmlTemplate, additionalParams, entityLabel.

  Parameter	Description
  Resources	External scripts and styles loaded before the action runs.
  CSS	Styling for the HTML template.
  HTML	Layout of the rendered dialog or panel.
  JS	Action logic.

• Mobile action

  Triggers a native device feature inside a ThingsBoard mobile app, like the camera or QR scanner.

  Parameter	Description
  Mobile action type	Take picture from gallery, Take photo, Open map directions, Open map location, Scan QR Code, Make phone call, Get phone location, Take screenshot, or Device provision.

• Open URL

  Opens a website or external link when clicked.

  Parameter	Description
  URL	The address to open (required).
  Open in a new browser tab	Keeps the current dashboard open while opening the link.

To configure a parameter, click its edit icon. When Action is set to Do nothing, the Value options depend on which parameter you are configuring:

Parameter	Value
Value	Any number — displayed on the scale until the device sends data.
Warning state	True or False
Critical state	True or False
Critical state animation	True or False

For all other actions, the configuration dialog works the same way regardless of which parameter you are editing:

• Execute RPC

  Read the parameter value from an RPC response.

  Parameter	Description
  Method	RPC method to call, like getState or getLevel.
  Action result converter	None — parameter is activated when the result matches the value you specify; Function — parameter is activated when your f(data) returns true.
  ’[parameter]’ when result is	The value or condition that activates this parameter (not shown for Value, which uses the raw numeric result).
  RPC request timeout (ms)	How long to wait for a device response before timing out (Advanced settings).
  RPC request persistent	Stores and retries the command until the device comes online (Advanced settings).

• Get attribute

  Read the parameter value from a device attribute.

  Parameter	Description
  Attribute scope	Where the attribute is stored: Any, Client, Server, or Shared.
  Attribute key	Attribute name to read, like state or level.
  Action result converter	None — parameter is activated when the attribute equals the value you specify; Function — parameter is activated when your f(data) returns true.
  ’[parameter]’ when result is	The value or condition that activates this parameter (not shown for Value, which uses the raw numeric result).

• Get time series

  Read the parameter value from the latest telemetry reading.

  Parameter	Description
  Time series key	Telemetry key to monitor, like waterLevel or pressure.
  Action result converter	None — parameter is activated when the telemetry value equals what you specify; Function — parameter is activated when your f(data) returns true.
  ’[parameter]’ when result is	The value or condition that activates this parameter (not shown for Value, which uses the raw numeric result).

• Get alarm status

  Activate the parameter when a specific alarm is active on the device.

  Parameter	Description
  Alarm severity	Which severity levels trigger the active state: Critical, Major, Minor, Warning, or Indeterminate.
  Alarm types	Any alarm, or a specific alarm type.

• Get dashboard state id

  Activate the parameter based on which dashboard state is currently open.

  Parameter	Description
  Action result converter	None — parameter is activated when the state name matches the text you enter; Function — parameter is activated when your f(data) returns true.
  ’[parameter]’ when result is	The state name or condition that activates this parameter.

• Get dashboard state object

  Activate the parameter using the full dashboard state context; use this when you need to evaluate multiple state parameters at once.

  Parameter	Description
  Parse value function	Write a f(data) function that returns the parameter value.

The Appearance section controls the gauge scale, visual elements, and color states.

Setting	Default	Description
Title	Widget name	Widget title displayed in the header. Supports entityName and entityLabel variables.
Card icon	—	Icon shown in the widget header. Configure its size and color.
Min and max value	Min: 0, Max: 100	The numeric range of the gauge scale. The current Value is mapped within this range.
Background color	Transparent	Background color of the gauge area.
Progress bar	Enabled (blue)	Filled bar that grows from the minimum toward the current value. Toggle on/off and configure color.
Progress arrow	Disabled	Arrow marker that points to the current value on the scale. Toggle on/off and configure color.
Value box	Enabled	Box displaying the raw numeric value. Toggle on/off and configure color.
Value text	Units: %	Text label shown alongside the value. Configure units, font, and color.
Enable units on scale	Disabled	When enabled, shows the unit label on the scale ticks.
Major ticks	Intervals: 10	Number of intervals between major tick marks. Configure font and color for Normal, Warning, and Critical states.
Major ticks color	Normal: gray, Warning: orange, Critical: red	Tick color changes automatically based on the active state.
Minor ticks	Intervals: 10	Number of intervals between minor tick marks. Configure color for Normal, Warning, and Critical states.
Minor ticks color	Normal: gray, Warning: orange, Critical: red	Tick color changes automatically based on the active state.

The Card appearance section controls the widget container style.

Setting	Default	Description
Background	Transparent	Card background color.
Show card buttons	Fullscreen	Buttons shown on the card when hovered.
Card border radius	0px	Rounding of card corners.
Card padding	12px	Inner spacing between the card edge and widget content.

Gauge shows no value or value stays at minimum

Cause	Solution
Value action is set to Do nothing	Open the Value edit dialog, set the correct Action, and specify the telemetry or attribute key.
Telemetry key mismatch	Verify that the key name in the behavior configuration matches exactly what the device reports.
Target device is not connected	Confirm that the selected device is online and actively sending data.

Warning or critical colors do not appear on the scale

Cause	Solution
Warning state or Critical state action is Do nothing and value is False	Configure the state parameter to read from an alarm status or a device attribute.
Alarm is not active on the device	Confirm that the device has an active alarm of the expected severity.

These widgets are used in the following ready-made solution templates built on the Traditional SCADA fluid system bundle:

• SCADA Swimming pool — a complete swimming pool monitoring dashboard built with pipe, pump, valve, and gauge widgets from the Traditional SCADA fluid system bundle.