I have two RGBW dimmers working on an old Vera hub (trying to retire it). I can up-pair them from the Vera, and sort of pair them with my C-7. They both show up as units when paired, but I can’t control anything.
What driver are you using?
If you don't know what I'm asking, look here and just follow the steps to view without changing anything (although I suspect you might need to -- someone can tell once we know):
Thank-you, I selected a Fibaro RGBW driver and now have control. Now how do I set default levels for each of the RGB & W channels? At this point if I use the dashboard on/off it turns off on lights with ‘off’, but doesn’t turn all of them back on with ‘on’
Since your device doesn't look like a Fibaro, have you tried another driver like Generic Z-Wave RGBWW Controller? (I don't know what your device does for white channels, so this might not actually be the best.)
Typically, an "on" will put the device on with its last settings; if you want a specific color or CT, a "Set Color" or "Set Color Temperature" with the desired parameters should also turn on the device (no extra "on" needed).
I’m now using the’ Generic Z-Wave RGBWW Controller’ driver and the problem remains, off turn off all channels, on only turns on the RGB channels. I want on to have all 4 channels @ 99. Can this be done?
Typically, the device will be in either color (RGB) or color temperature (CT) mode, as indicated by the colorMode attribute in "Current States." An "On" command will likely only turn it on to the last mode, with the appropriate channels as part of that. Depending on the driver and the commands it offers, you might need to issue both a Set Color and Set Color Temperature or (more likely because those are just likely to switch modes, not activate both) issue channel-specific custom commands instead. I'm not familiar with this particular device, so it will depend on what options both it and the driver offer.
You may need to individually issue the commands to each channel (or set a color and then set a cold white level -- fewer commands for the same result), which it looks like are available, given the above behavior of color/CT devices.
Right! So, how do I issue one command that will set color to “hue: 0, saturation: 0, level: 100” and set Warm White to 100?
Any way you want to. 
How is your automation set up now, e.g., with what app? The easiest approach would probably just involve a modification of that. But the per-channel commands are custom commands, so you would need something like Rule Machine, Button Controller, or a custom app.
Download the Hubitat app
