Home Assistant

Compensation

The Compensation integrationIntegrations connect and integrate Home Assistant with your devices, services, and more.
[Learn more] consumes the stateThe state holds the information of interest of an entity, for example, if a light is on or off. Each entity has exactly one state and the state only holds one value at a time. However, entities can store attributes related to that state such as brightness, color, or a unit of measurement.
[Learn more] from other sensorsSensors return information about a thing, for instance the level of water in a tank.
[Learn more]. It exports the compensated value as state in a separate entityAn entity represents a sensor, actor, or function in Home Assistant. Entities are used to monitor physical properties or to control other entities. An entity is usually part of a device or a service.
[Learn more] and the following values as attributes: entity_id and coefficients. A single polynomial, linear by default, is fit to all data points provided.

Configuration

To enable the compensation sensor, add the following lines to your configuration.yaml:

# Example configuration.yaml entry
compensation:
  media_player_db_volume:
    source: media_player.yamaha_receiver
    attribute: volume_level
    unit_of_measurement: dB
    data_points:
      - [0.2, -80.0]
      - [1.0, 0.0]

  media_player_db_volume:
    source: media_player.yamaha_receiver_zone_2
    attribute: volume_level
    unit_of_measurement: dB
    # Ensure that the sensor's value will not have a state lower than -80.0
    # when the source sensors value is less than 0.2
    lower_limit: true
    # Ensure that the sensor's value will not have a state greater than 0.0
    # when the source sensors value is greater than 1.0
    upper_limit: true
    data_points:
      - [0.2, -80.0]
      - [1.0, 0.0]

Configuration Variables

Looking for your configuration file?
source string Required

The entity to monitor/compensate.

data_points list Required

The collection of data point conversions with the format [uncompensated_value, compensated_value]. e.g., [1.0, 2.1]. The number of required data points is equal to the polynomial degree + 1. For example, a linear compensation (with degree: 1) requires at least 2 data points.

unique_id string (Optional)

An ID that uniquely identifies this sensor. Set this to a unique value to allow customization through the UI.

attribute string (Optional)

Attribute from the source to monitor/compensate. When omitted the state value of the source will be used.

degree integer (Optional, default: 1)

The degree of a polynomial. e.g., Linear compensation (y = x + 3) has 1 degree, Quadratic compensation (y = x2 + x + 3) has 2 degrees, etc.

precision integer (Optional, default: 2)

Defines the precision of the calculated values, through the argument of round().

unit_of_measurement string (Optional)

Defines the units of measurement of the sensor, if any.

lower_limit boolean (Optional, default: false)

Enables a lower limit for the sensor. The lower limit is defined by the data collections (data_points) lowest uncompensated_value. For example, if the lowest uncompensated_value value is 1.0 and the paired compensated_value is 0.0, any source state less than 1.0 will produce a compensated state of 0.0.

upper_limit boolean (Optional, default: false)

Enables an upper limit for the sensor. The upper limit is defined by the data collections (data_points) greatest uncompensated_value. For example, if the greatest uncompensated_value value is 5.0 and the paired compensated_value is 10.0, any source state greater than 5.0 will produce a compensated state of 10.0.