Phlips Hue - RGB Color Feedback - Zigbee

[admin]

Use this conversion function:

Code:

function xytorgb(x, y, level)   local function revgamma(v)     if v <= 0.0031308 then       return v * 12.92     else       return (1 + 0.055) * math.pow(v, (1 / 2.4)) - 0.055     end   end   local function clampconvert(v, max)     v = math.max(0, v * 255 / max)     v = math.min(255, v)     return math.round(v)   end   local x = x / 0xFFFE   local y = y / 0xFFFE   local z = 1 - x - y   local Y = math.min(254, level) / 254   local X = (Y / y) * x   local Z = (Y / y) * z   local r = revgamma(3.2404542 * X - 1.5371385 * Y - 0.4985314 * Z)   local g = revgamma(-0.9692660 * X + 1.8760108 * Y + 0.0415560 * Z)   local b = revgamma(0.0556434 * X - 0.2040259 * Y + 1.0572252 * Z)   local max = math.max(r, g, b)   r = clampconvert(r, max)   g = clampconvert(g, max)   b = clampconvert(b, max)   return r * 0x10000 + g * 0x100 + b end x = 45913 y = 19614 level = 254 rgb = xytorgb(x, y, level) log(rgb)

You also need to pass the light level (0..254) for the conversion to work.