Hue Brightness feedback

[Daniel]

Hi
Here is a script which should convert color temperature to RGB. Never tested on real light but check if it will work.

Code:

Temperature = event.getvalue()


Temperature = Temperature / 100
   
  -- Calculate Red:

if Temperature <= 66 then
    Red = 255
else
 Red = Temperature - 60
 Red = 329.698727446 *  math.pow(Red, -0.1332047592)
 if Red < 0 then
   Red = 0
 end
 if Red > 255 then
   Red = 255
 end
end
   
   --Calculate Green:

if Temperature <= 66 then
  Green = Temperature
  Green = 99.4708025861 * math.log(Green) - 161.1195681661
 if Green < 0 then
   Green = 0
 end  
 if Green > 255 then
   Green = 255
 end  
else
  Green = Temperature - 60
  Green = 288.1221695283 * math.pow(Green, -0.0755148492)
  if Green < 0 then
   Green = 0
 end
 if Green > 255 then
   Green = 255
 end  
end
   
   --Calculate Blue:

if Temperature >= 66 then
  Blue = 255
else
  if Temperature <= 19 then
     Blue = 0
 else
     Blue = Temperature - 10
     Blue = 138.5177312231 * math.log(Blue) - 305.0447927307
     if Blue < 0 then
         Blue = 0
       end
     if Blue > 255 then
         Blue = 255
       end
 end
end

Red = math.floor(Red + 0.5)
Green = math.floor(Green + 0.5)
Blue = math.floor(Blue + 0.5)


Red = lmcore.inttohex(Red, 1)
Green = lmcore.inttohex(Green, 1)
Blue = lmcore.inttohex(Blue, 1)


RGB = lmcore.hextoint(Red..Green..Blue)

grp.update('RGB temp', RGB)

BR