Change color temp of bulbs with rotation?

[pdawg17]

I am trying to adjust the color temp of my Hue bulbs with rotation but cannot get it working correctly. Is it possible? I may be interpreting how this plugin works but if I use "Kelvin", rotationAbsolute is only a number between 0 and 255 and rotationPercent is 0-100%, does it not work because Kelvin is a range of numbers that do not fit for these categories?

[cgiesche]

With a bit of Math-Foo it works (for me with my hue lights):
Service Data for "Turn On" Service:

{% set min = 2200 %}
{% set max = 6535 %}
{
"kelvin": {{ min + rotationAbsolute * ((max - min) / 255) }}
}

min = Minimum color temp supported by bulb
max = Maximum color temp supported by bulb

You can validate all values and the outcome with custom labels:

{{min_color_temp_kelvin}}-{{max_color_temp_kelvin}}
{{color_temp_kelvin}}

---

Bonus:
You can create nice "bright cold to dim warm" effects, too:

{% set min = 2200 %}
{% set max = 4000 %}
{
"kelvin": {{ min + rotationAbsolute * ((max - min) / 255) }},
"brightness": {{ rotationAbsolute }}
}

[pdawg17]

With a bit of Math-Foo it works (for me with my hue lights): Service Data for "Turn On" Service:

{% set min = 2200 %}
{% set max = 6535 %}
{
"kelvin": {{ min + rotationAbsolute * ((max - min) / 255) }}
}

min = Minimum color temp supported by bulb max = Maximum color temp supported by bulb

You can validate all values and the outcome with custom labels:

{{min_color_temp_kelvin}}-{{max_color_temp_kelvin}}
{{color_temp_kelvin}}

Bonus: You can create nice "bright cold to dim warm" effects, too:

{% set min = 2200 %}
{% set max = 4000 %}
{
"kelvin": {{ min + rotationAbsolute * ((max - min) / 255) }},
"brightness": {{ rotationAbsolute }}
}

WOW! Thank you! Works great! That's way above my Math-Foo level...

[Samywamy10]

Is it possible to create something similar for colours? Requires a bit more maths. I mucked around with it but couldn't get anything reliable

[alexwhelan1997]

@cgiesche this would be cool :)

[cgiesche]

{
"hs_color": [{{(360 / 255 * rotationAbsolute) | round }},100]
}

Cycles through all colors. Saturation is always 100% in this example.