Warning

Needs Custom Integration installed in Home Assistant for this node to function

Sensor

The Sensor node creates a sensor entity within Home Assistant that is controlled from Node-RED. Sensors are entities that report data from various sources, such as temperature, humidity, or motion detection. This node allows you to create and manage such sensors directly from your Node-RED flows.

Configuration

State required

  • Type: string | number | boolean

The state the entity should be updated to

To set the Home Assistant state to Unknown, send a state with a js expression null.

Available

  • Type: boolean
  • Default: true

Whether the Home Assistant entity is available. By default, every update sends available as true. On creation, or after a Home Assistant restart without Resend, the entity starts unavailable until availability is set again.

If availability comes from a message, flow, global, or expression, and that value is missing, it is not sent and Home Assistant leaves availability unchanged. In that case, set availability again after a Home Assistant or Node-RED restart or the entity will remain unavailable.

Attributes

  • Type: Object

Key/Value pair of attributes to update. The key should be a string and the value can be a [string | number | boolean | object]

Input Override

  • Type: string
  • Values: accept | merge | block

Determine how input values will be handled. When merge is selected the message object values will override the configuration values.

Resend state, attributes, and available

  • Type: boolean

When creating the entity in Home Assistant this will also send the last updated state, attributes, and available value the node sent to Home Assistant

Partial updates

State, available, and the attribute map are updated independently. Home Assistant keeps the last value for anything omitted.

For example, you can send a new state without changing attributes, flip availability without a state, or update the attribute map alone. A message that resolves nothing for all three parts is ignored (no update is sent).

Inputs

properties of msg.payload

state

  • Type: string | number | boolean

The state the entity should be updated to

available

  • Type: boolean

Optional. Sets entity availability for this update. Omit to leave availability unchanged.

attributes

  • Type: Object

Key/Value pair of attributes to update. The key should be a string and the value can be a [string | number | boolean | object]