I just submitted a pull request which would add Hue group support to the official Hue Connect SmartApp and Hue device types. Worth noting that this does not include any of the transition time functionality.
Hey @kelchm, I just pushed your devicetypes and the group was discovered and installed ok, but iām getting an error trying to turn the group on/off:
NOT PROCESSED: [{"error":{"type":5,"address":"/groups/1g","description":"invalid/missing parameters in body"}}]
Have you seen this error before?
Thanks,
matt
Thatās a new one for me. Iām not sure what the cause would be off the top of my head.
Iāve actually fully switched over to using the SmartApp and Device Types in my pull request. These stick to the standard SmartThings behavior for SetLevel() and do not implement the transitiontime additions.
I just sent a pull request to your pull request : ). Changing the PUT call to use the nicely parsed version of HubAction rather than the raw string version fixed my issue but Iām not sure what the root cause was other than it wasnāt sending the body at all.
Thanks for the pull request. 
Thatās actually the āoldā version which I donāt plan on maintaining. You can see the version I am currently using in this branch.
@Matt_LeVan Thanks for fixing that issue!!! It was what was stopping me from using this app
@kelchm Thanks to you as well for updating with your changes. I definitely prefer this method.
A question to both of you:
I notice an issue when using Smart Lighting and trying to set the level that the app doesnāt trigger properly. Have either of you guys noticed this? I noticed it with the Lux & my Cree lights that are on my Hue hub.
Just posted a modified version of zpriddyās Hue Groups app that includes Hue Scenes as well:
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I think I love you 
Ok - thatās me saved from my development project for this month - Iāll be testing that this week.