KNX Light

The knx integration must be configured correctly to use this integration, see KNX Integration.

The knx light integration is used as an interface to control knx actuators for lighting applications such as:

switching actuators
dimming actuators
LED controllers
DALI gateways

Configuration

To use your KNX light in your installation, add the following lines to your configuration.yaml file:

# Example configuration.yaml entry
light:
  - platform: knx
    address: '1/0/9'

Configuration Variables

address

(string)(Required)

KNX group address for switching the light on and off. DPT 1.001

state_address

(string)(Optional)

KNX group address for retrieving the switch state of the light. DPT 1.001

name

(string)(Optional)

A name for this device used within Home Assistant.

brightness_address

(string)(Optional)

KNX group address for setting the brightness of the light in percent (absolute dimming). DPT 5.001

brightness_state_address

(string)(Optional)

KNX group address for retrieving the brightness of the light in percent. DPT 5.001

color_address

(string)(Optional)

KNX group address for setting the RGB color of the light. DPT 232.600

color_state_address

(string)(Optional)

KNX group address for retrieving the RGB color of the light. DPT 232.600

rgbw_address

(string)(Optional)

KNX group address for setting the RGBW color of the light. DPT 251.600

rgbw_state_address

(string)(Optional)

KNX group address for retrieving the RGBW color of the light. DPT 251.600

color_temperature_address

(string)(Optional)

KNX group address for setting the color temperature of the light. DPT 5.001 or 7.600 based on color_temperature_mode

color_temperature_state_address

(string)(Optional)

KNX group address for retrieving the color temperature of the light. DPT 5.001 or 7.600 based on color_temperature_mode

color_temperature_mode

(string)(Optional)

Color temperature group address data type. absolute color temperature in Kelvin. color_temperature_address -> DPT 7.600. relative color temperature in percent cold white (0% warmest; 100% coldest). color_temperature_address -> DPT 5.001

Default value:

absolute

min_kelvin

(integer)(Optional)

Warmest possible color temperature in Kelvin. (Used in combination with color_temperature_address)

Default value:

2700

max_kelvin

(integer)(Optional)

Coldest possible color temperature in Kelvin. (Used in combination with color_temperature_address)

Default value:

6000

Many KNX devices can change their state internally without a message to the switch address on the KNX bus, e.g., if you configure a scene or a timer on a channel. The optional state_address can be used to inform Home Assistant about these state changes. If a KNX message is seen on the bus addressed to the given state_address (in most cases from the light actuator), it will overwrite the state of the switch object.

For switching/light actuators that are only controlled by a single group address and don’t have dedicated state communication objects you can set state_address to the same value as address.

Note on tunable white: Home-Assistant uses Mireds as the unit for color temperature, whereas KNX typically uses Kelvin. The Kelvin/Mireds relationship is reciprocal, not linear, therefore the color temperature pickers (sliders) in Home-Assistant may not align with ones of KNX visualizations. This is the expected behavior.

Extended configuration example

light:
  # dimmable light
  - platform: knx
    name: Bedroom-Light-1
    address: '1/0/9'
    state_address: '1/1/9'
    brightness_address: '1/2/9'
    brightness_state_address: '1/3/9'
  #
  # RGB light
  - platform: knx
    name: Bathroom-Light-1
    address: '1/0/9'
    state_address: '1/1/9'
    brightness_address: '1/2/9'
    brightness_state_address: '1/3/9'
    color_address: '1/4/9'
    color_state_address: '1/5/9'
  #
  # tunable white light
  - platform: knx
    name: Office-Light-1
    address: '1/0/21'
    state_address: '1/1/21'
    brightness_address: '1/2/21'
    brightness_state_address: '1/3/21'
    color_temperature_address: '1/4/21'
    color_temperature_state_address: '1/5/21'
    color_temperature_mode: absolute
    min_kelvin: 2550
    max_kelvin: 6200
  #
  # actuator without dedicated state communication object
  - platform: knx
    name: Cellar-Light-1
    address: '1/0/5'
    state_address: '1/0/5'