I have a LED strip (RGBW) where I can control each channel separately by defining a KNX light for every channel. I can now set every color by manually dimming those lights (ledstrip_R, ledstrip_G, ledstrip_B, ledstrip_W).
Is there any way to combine those channels into one Light entity so that I can set the color with the color picker?
Write a script that accepts 3 values. The script should use each of those values for each light. Whenever you want to set a color, call the script and supply it with the 3 values.
The last 2 examples in the link show you how to pass variables to a script.
How can I manage to call this script because I selected a color in the color picker? Can I somehow create another light entity where I can attach my script?
You can use a switch template or light template that will show up as a toggle in Home assistant. Then in the turn_on, turn_off sections of those functions, you can call a script. I’m not sure if you can specify a color with those devices, but you could have a separate input_select that defines the color when those devices turn on.
This may be more than you wanted to do. But I use this fine code by BRUH to control LED strips
Put the code on an ESP8266, and then you can integrate it right into HA. If you want multiple lights to be controlled by the same entity, you just subscribe the ESP connected to each strip to the same MQTT topic. I have status lights around my house that alert me to driveway motion, door entry, water leaks, Internet outage, etc.
I can also set the color for all my LED strips via one entity in the HA UI
Pretty cool, where did you place the LEDs in your house?
Ah cool. I’ll have to do something like this myself. It looks pretty handy and both of those look ‘wife approved’.
Credit for the models go to the authors on thingiverse.com who designed those models that I 3D printed. I definitely don’t have much artistic ability
I’ve now found a way to solve this. I created a mqtt_json light, which is listening to a dummy topic. This will probably also work with other lights, but mqtt_json supports RGB and white channel:
- platform: mqtt_json
name: wohnzimmer_strip
brightness: true
rgb: true
command_topic: "dummy"
optimistic: true
white_value: true
This gives me a dimmable light with a color picker and also a white channel:
With this, I can have automations which forward the state of this light to the individual lights:
- alias: "Wohnzimmer LED Strip Color"
trigger:
platform: state
entity_id: light.wohnzimmer_strip
condition:
- condition: state
entity_id: light.wohnzimmer_strip state: 'on'
action:
- service: light.turn_on
entity_id: light.wohnzimmer_strip_decke_r
data_template:
brightness: "{{ (states.light.wohnzimmer_strip.attributes.rgb_color[0] * (states.light.wohnzimmer_strip.attributes.brightness / 255)) | int }}"
- service: light.turn_on
entity_id: light.wohnzimmer_strip_decke_g
data_template:
brightness: "{{ (states.light.wohnzimmer_strip.attributes.rgb_color[1] * (states.light.wohnzimmer_strip.attributes.brightness / 255)) | int }}"
- service: light.turn_on
entity_id: light.wohnzimmer_strip_decke_b
data_template:
brightness: "{{ (states.light.wohnzimmer_strip.attributes.rgb_color[2] * (states.light.wohnzimmer_strip.attributes.brightness / 255)) | int }}"
- service: light.turn_on
entity_id: light.wohnzimmer_strip_decke_w
data_template:
brightness: "{{ (states.light.wohnzimmer_strip.attributes.white_value * (states.light.wohnzimmer_strip.attributes.brightness / 255)) | int }}"
- alias: "Wohnzimmer LED Strip Power" trigger:
platform: state
entity_id: light.wohnzimmer_strip
to: 'off'
action:
- service: light.turn_off
entity_id: light.wohnzimmer_strip_decke_r
- service: light.turn_off
entity_id: light.wohnzimmer_strip_decke_g
- service: light.turn_off
entity_id: light.wohnzimmer_strip_decke_b
- service: light.turn_off
entity_id: light.wohnzimmer_strip_decke_w
I’d prefer if I could pack everything into one rule, but it seems like the rgb_color attribute is not present when the light is turned off.
This is the same method the BRUH Automation guy uses in his code. JSON. Since I use his code my lights behave exactly as you described. I have all mine on the same MQTT topic, but one certainly wouldn’t have to limit it to one topic
HI, have you any idea how to make it the outer way around? I.e. Use a RGB(W) Controller as 3-4 individual LED Dimm channels?
thank you very much. Great solution. Did you find any way to also adjust the color temperature?