RGB relative dimming from KNX

[alexll]

Pure conversion of this script in to dimming of 3 objects is this but I'm not sure if this is what you need. Most likely you would have to calculate saturation.

Code:

addressbyteoutput1 = '32/1/1' addressbyteoutput2 = '32/1/2' addressbyteoutput3 = '32/1/3' stepsize = 10 value = event.getvalue() current1 = grp.getvalue(addressbyteoutput1) current2 = grp.getvalue(addressbyteoutput2) current3 = grp.getvalue(addressbyteoutput3) if value < 8 and value ~= 0 then   log('down',value)   if current1 <= stepsize then     output = 0     if current1 ~= output then       grp.write(addressbyteoutput1, output)        end   else     output = current1 - stepsize     if current1 ~= output then       grp.write(addressbyteoutput1, output)     end   end if current2 <= stepsize then     output = 0     if current2 ~= output then       grp.write(addressbyteoutput2, output)        end   else     output = current2 - stepsize     if current2 ~= output then       grp.write(addressbyteoutput2, output)     end   end  if current3 <= stepsize then     output = 0     if current3 ~= output then       grp.write(addressbyteoutput3, output)        end   else     output = current3 - stepsize     if current3 ~= output then       grp.write(addressbyteoutput3, output)     end   end      elseif value > 8 then   log('up',value)   if current1 >= (100 - stepsize) then     output = 100     if current1 ~= output then       grp.write(addressbyteoutput1, output)     end   else     output = current1 + stepsize     if current1 ~= output then       grp.write(addressbyteoutput1, output)     end   end     if current2 >= (100 - stepsize) then     output = 100     if current2 ~= output then       grp.write(addressbyteoutput2, output)     end   else     output = current2 + stepsize     if current2 ~= output then       grp.write(addressbyteoutput2, output)     end   end     if current3 >= (100 - stepsize) then     output = 100     if current3 ~= output then       grp.write(addressbyteoutput3, output)     end   else     output = current3 + stepsize     if current3 ~= output then       grp.write(addressbyteoutput3, output)     end   end end

Thanks for the quick answer. That would work, but like dimming 3 independent lights.

I think the theorical way should be, first, to convert those 3 1byte objects in a 3byte RGB value (232.600). After that, to "dim" that value and, finally, go the other way round.
The problem is I can't achieve that   .