RGBW Controller (SRP-ZV9105 / ZW1002)

Hi,

I'm curious if there's a way to have full control of this unit either via indigo touch or, ideally, HomeKit.

I'm able to turn the unit on and off and dim it but only through indigo client am I able to control the white level independently. See screenshot.


Ideally I'd like to be able to control that level independently. Is there a way to create a trigger or a scene that controls just that value? A virtual device?

Help! Thanks for any tips.