Emulated_hue and Google Home - change the colors of the lights

mihaifireball · February 18, 2017, 1:33pm

I am using Google Home and Home Assistant to control some white and color Yeelight bulbs. The power on/off and brightness setup features are working, but i cant change the color of the bulbs by voice. Do you think it will be possible to implement that feature?
Thanks!

dramamoose · February 19, 2017, 8:35am

This would be a wonderful addition. I think it should certainly be possible to do. Right now, emulated hue gives everything as a “Dimmable light”. It should be entirely possible to provide, instead, “Extended Color Light”, but then we would have to build in the RGB aspects to the code. It’d be interesting if those who put together emulated hue could give their thoughts on this.

mihaifireball · February 19, 2017, 1:26pm

The change from “Dimmable light” to “Extended Color Light” is very simple and already did this in the emulated_hue.py. Now Google Home detects my lights as colored ones, but that’s it for the momment… no color change…

dramamoose · February 19, 2017, 5:25pm

Yeah, we’d have to build out the infrastructure to send/catch the colors of the lights, which I think might require identifying whether the component is in fact a light with RGB capabilities.

mihaifireball · February 19, 2017, 6:36pm

I have done some research with ha-bridge and it seems that when I am asking to Google Home to change the color, it gives the XY values of that color.
Before changing the color:
"2":{"state":{"on":true,"bri":254,"hue":0,"sat":0,"effect":"none","ct":0,"alert":"none","reachable":true},"type":"Extended color light","name":"Color Light","modelid":"LCT001","manufacturername":"Philips","uniqueid":"00:17:88:5E:D3:02-02","swversion":"5.23.1.13452"}}

After changing the color to Green:

"2":{"state":{"on":true,"bri":254,"hue":0,"sat":0,"effect":"none","ct":0,"alert":"none","reachable":true,"xy":[0.7006062269210815,0.29930099844932556]},"type":"Extended color light","name":"Color Light","modelid":"LCT001","manufacturername":"Philips","uniqueid":"00:17:88:5E:D3:02-02","swversion":"5.23.1.13452"}

dramamoose · February 20, 2017, 1:02am

Interesting. I know that we can provide an XY value in the turn_on service, but I don’t think it’s particularly well-implemented, especially in non-hue components. I wonder if there’s a formula out there to convert XY to RGB.

dramamoose · February 20, 2017, 2:04am

Philips hue provides one, I’m assuming this value is using Gamut B since that’s what they use for their bulbs. They provide the objective C to convert it, I’m currently working on turning it into Python. Then, we could throw that into the package for an individual component to do a quick and dirty conversion when no RGB value is sent but an XY value is.

That part is definitely within my capabilities but it’s a hacky solution, the most efficient solution is probably to use the emulated_hue component which I have limited experience with. I think it would be more efficient to have emulated_hue offer both the xy and rgb values, then the individual lights could choose which to handle; this wouldn’t require any additional changes to the individual lights.

I wonder if @balloob, @jeremydk or @hoopty could comment here, since github has them as the suggested reviewers for emulated_hue.

dramamoose · February 20, 2017, 2:58am

I put together a basic function which does the conversion as per Phillips Hue’s formula. It’s a little hacky, since we’re ignoring the limits Phillips puts on their bulb’s XY input (which in their case serve to prevent the bulb from displaying an impossible color, something we’re not concerned about here).I don’t know if the edge cases can even occur in Emulated_Hue, since the sender (Google Home/Alexa) might force any colors to live within the color range.

github.com

dramamoose/Misc_Code/blob/master/Hue xy_to_rgb

"""Simple function to convert XY values provided by Phillips Hue light sinto rgb values usable by other light sources"""

def xy_to_rgb(COLOR_LITTLE_X, COLOR_LITTLE_Y, BRIGHTNESS):
    #Calculate XYZ values
    COLOR_LITTLE_Z = 1 - COLOR_LITTLE_X - COLOR_LITTLE_Y
    COLOR_Y = BRIGHTNESS
    COLOR_X = (COLOR_Y / COLOR_LITTLE_Y) * COLOR_LITTLE_X
    COLOR_Z = (COLOR_Y / COLOR_LITTLE_Y) * COLOR_LITTLE_Z
    #Covert to RGB using Wide RGB D65 conversion
    COLOR_R = COLOR_X * 1.656492 - COLOR_Y * 0.354851 - COLOR_Z * 0.255038
    COLOR_G = COLOR_X * -0.707196 + COLOR_Y * 1.655397 + COLOR_Z * 0.036152
    COLOR_B = COLOR_X * 0.051713 - COLOR_Y * 0.121364 + COLOR_Z * 0.036152
    #Gamma Correction
    if COLOR_R <= 0.0031308:
        COLOR_R = 12.92 * COLOR_R
    else:
        COLOR_R = 1.055 * pow(COLOR_R, 1/2.4) - 0.055
    if COLOR_G <= 0.0031308:
        COLOR_G = 12.92 * COLOR_G
    else:

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stunts1337 · February 20, 2017, 8:40pm

Nice, I hope you guys get it working. I noticed this this past weekend when I was setting up my emulated hue. For me though, I have the physical hue bridge as well so I just use both and don’t include lights on my emulated hue.

This well definitely be useful for lights that aren’t hue lights though

dramamoose · March 2, 2017, 5:13pm

FYI, this is currently in development (by someone other than I); I’ve done some testing and it works perfectly. I don’t know if it will be ready for the next release, but it will definitely be showing up at some point.

mihaifireball · March 2, 2017, 7:05pm

That’s very good news!!
Please let me know if you need help with anything. I’m happy to help!

stunts1337 · March 2, 2017, 8:46pm

So you can tell google home to change the color of lights thru emulated hue?

dramamoose · March 3, 2017, 5:05am

Yes, like I said it’s still in development and I don’t know when the dev will be finished with it, but you’ll be able to say 'hey google, turn (light name) (color).

stunts1337 · March 17, 2017, 8:51pm

Bumping this… Can’t find anymore info and this… Would love to have it.

or if you ever get some time maybe you can tell us how you got this working @dramamoose, or tell us who is developing this so I can check out their work or something

dramamoose · March 18, 2017, 4:39pm

So the pull request is right here. Looks like the dev has temporarily paused working on it. I’ll follow up and see if I can help out with anything to get it finished up.

stunts1337 · March 19, 2017, 1:41am

Thanks ill go check it out

mihaifireball · March 19, 2017, 3:48pm

@dramamoose I have made some test with my Yeelight bulbs and it is working perfectly! It will be available in the next update?

stunts1337 · March 19, 2017, 3:59pm

I also am using it now, works well with my hue lights. Props to the dev

dramamoose · March 19, 2017, 4:53pm

Can’t guarantee anything since I’m not the dev, but I know he’s looking to work on it this week.

Wayne_Williamson · April 15, 2017, 11:35am

Also tried the code. Works well to get the colours. Can’t get it back to white though… tried white, warm white, cool white. Using them with limitless Led bulbs… Any other ideas?