Shelly - RGB + White channel doesn't work

[PaoloTK]

The problem

2021.5 added support for RGBW and RGBWW lights. I tend to use RGBW LED strips with warm white chips. When I want brighter and colder light I set the light to 255,255,255,255 (RGB white + warm white). Since updating to 2021.5 this is no longer possible. I assume HA is doing math in the background to convert RGB white to a white channel value. Is there a way to bypass this?

What is version of Home Assistant Core has the issue?

core-2021.5.1

What was the last working version of Home Assistant Core?

core-2021.4

What type of installation are you running?

Home Assistant Container

Integration causing the issue

Light

Link to integration documentation on our website

https://www.home-assistant.io/integrations/light/

Example YAML snippet

No response

Anything in the logs that might be useful for us?

No response

Additional information

No response

[thecode]

Can you add details which devices and what integration you use for controlling the RGBW device?

[probot-home-assistant]

light documentation
light source
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[PaoloTK]

Can you add details which devices and what integration you use for controlling the RGBW device?

I've tried both on a Shelly RGBW2 controller and WLED controller.
https://www.home-assistant.io/integrations/shelly
https://www.home-assistant.io/integrations/wled

I can set 255,255,255,255 from the devices UI by setting the RGB color wheel to white and setting the white channel slider to the max.

[thecode]

I am one of the HA developers for the Shelly integration and I added the RGBW support for Shelly integration, I don't have WLED, so lets focus on Shelly for now.
I use RGBW2 myself with an RGBW LED strip with warm white and have no issue.
How do you set the color to 255,255,255,255? From the frontend or from a service call?
Which Shelly FW version?

[probot-home-assistant]

shelly documentation
shelly source
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[probot-home-assistant]

Hey there @balloob, @bieniu, @chemelli74, mind taking a look at this issue as its been labeled with an integration (shelly) you are listed as a codeowner for? Thanks!
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[emontnemery]

I hid comments related to specifics of MQTT basic schema light and how Tasmota interprets the commands (#50316), let's keep that discussion there.

[emontnemery]

@PaoloTK can you please open a separate issue for WLED?

[github-actions]

There hasn't been any activity on this issue recently. Due to the high number of incoming GitHub notifications, we have to clean some of the old issues, as many of them have already been resolved with the latest updates.
Please make sure to update to the latest Home Assistant version and check if that solves the issue. Let us know if that works for you by adding a comment 👍
This issue has now been marked as stale and will be closed if no further activity occurs. Thank you for your contributions.