max_mireds from bulbs in a group is not exposed to HA during auto discovery.

[LucidityCrash]

What happened

Light group auto discovered in HA from z2m doesn't have max_mireds property

What did you expect to happen

Both the bulbs in the group (Zigbee 3.0 LED-bulb, RGBW LED) have a max_mireds value (Koenkk/zigbee-herdsman-converters@ecabe5b) I expected this to be exposed in the group discovery config and it is not so the discovered light entity in HA has a temperature slider that can go up to 500. When I was adding this manually to HA the max temperature on the slicer is limited to max_mireds.

How to reproduce it (minimal and precise)

Add lights that have a non default max_mireds (ie not 500) to a group. The discovered light entity in HA has a temperature slider that can go up to 500

Debug info

Zigbee2MQTT version: 1.20.0 commit: 41b67fd

Could class this as a feature request as you could say it is a bit of missing functionality rather than something being broken :)

[jwoodard80]

I actually just noticed this as well. I have 4 identical bulbs that run 153-370. I was able to edit the definition of the bulb and a PR was submitted by someone but the group does not have a place for that.

Might I suggest an option in the configuration.yaml to define a max/min if we are not pulling a value?

[Koenkk]

Added, please let me know if it works.

Changes will be available in the dev branch in a few hours from now. (https://www.zigbee2mqtt.io/how_tos/how-to-switch-to-dev-branch.html)

[jwoodard80]

Thank you very much for this! Appreciate the quick addition!

[Koenkk]

Need some input on this discussion I'm having with @sjorge here: 515599a#r53518817

Currently if a group has 2 bulbs with different color temperatures ranges:

• bulb A: range 100 - 350
• bulb B: range 150 - 400

In the current implementation (solution A), the range is set to the maximum one (in this case 100 - 400). However if you would now set the group color temperature to lets say 370 it would result in:

• bulb A: 350 (max since it cannot handle 370) <-- inconsistent state
• bulb B: 370 (as expected)

An alternative implementation (solution B) could be that the range is set such that it fits all bulbs (in this case 150 - 350). The downside is that you cannot set bulb B to the max range anymore via the group.

What would be the preferred solution (a or b)?

[Koenkk]

Implemented solution B now thanks for your input in 515599a#r53548408