Color format

[pkastner]

Hi @Marmelatze,

first thanks for putting this on GitHub!
Did you find out how exactly the color is encoded. For example what does 35:e8:03:0a:00:94:00:a2:30:ff:2f:00:10 stand for exactly?

[Marmelatze]

I'm still trying to figure this out. As you see the example code is increasing one byte and sends it to the lamp. But the color is totally random.

Examples for some shades of green:

35:14:00:0a:00:98:00:d5:30:ff:2f:00:10
35:14:00:0a:00:9b:00:ee:30:ff:2f:00:10
35:14:00:0a:00:9d:00:07:31:ff:2f:00:10
35:14:00:0a:00:9f:00:20:31:ff:2f:00:10
35:14:00:0a:00:a1:00:39:31:ff:2f:00:10
35:14:00:0a:00:a9:00:9e:31:ff:2f:00:10
35:14:00:0a:00:ab:00:b7:31:ff:2f:00:10
35:14:00:0a:00:ad:00:d0:31:ff:2f:00:10
35:14:00:0a:00:b0:00:e9:31:ff:2f:00:10 

35:e8:03:0a:00:94:00:a2:30:ff:2f:00:10 is also green. I got these values from bluetooth le sniffing.

Some other code I found for controlling avea: https://github.com/guh/guh/blob/master/plugins/deviceplugins/elgato/aveabulb.cpp

Help would be much appreciated.

[Marmelatze]

This is how its done:

There are 4 color variables: white, red, green, blue (each from 1-4096)

To compute the command I use to following function:

rgbToAvea (white, r, g, b)
    {
        const j = 500;
        let color = new Buffer(8);
        color.writeUInt16BE(white * 16, 0);
        color.writeUInt16BE(r * 16, 2);
        color.writeUInt16BE(g * 16, 4);
        color.writeUInt16BE(b * 16, 6);
        return new Buffer([
            0x35,
            j & 0xFF,
            j >> 8 & 0xff,
            10,
            0,
            color[1],
            color[0] | 0x80,
            color[3],
            color[2] | 0x30,
            color[5],
            color[4] | 0x20,
            color[7],
            color[6] | 0x10,
        ]);
    }

j seem to be the time for fading to the specific color (default 500?)

[digitalhoax]

Just poked around the code only to find this issue where everything is already solved. Thanks a lot for putting it up, maybe put this info in the readme or add the actual code to the project?

[Marmelatze]

Here you go. Had some problems figuring out decoding the received color codes.

[digitalhoax]

Awesome. Great update on the Readme, thanks a lot! Now I need to add this to Fhem and Homebridge so I can control the bulbs via Siri.