Brightness adjustment (HSBType won't keep color)

Setup, Configuration and Use Beginners
, ,
1

I want to extract Brightness from a HSB Type and vice-versa.
This rule works:

rule "Adjust sideboard brightness from HSB"
when
	Item TV_sideboard_Color changed
then
	val TV_sideboard_bri = (TV_sideboard_Color.state as HSBType).getBrightness()
	if(TV_sideboard_bri != TV_sideboard_Dimm.state)
	{
		TV_sideboard_Dimm.postUpdate(TV_sideboard_bri)
	} 
end

But:
Changing only the third value of a HSB won’t work.
This was my approach:

rule "Adjust sideboard HSB from brightness"
when
	Item TV_sideboard_Dimm changed
then
	val TV_sideboard_hue = (TV_sideboard_Color.state as HSBType).getHue()
	val TV_sideboard_sat = (TV_sideboard_Color.state as HSBType).getSaturation()
	val TV_sideboard_bri = (TV_sideboard_Color.state as HSBType).getBrightness()
	if(TV_sideboard_bri != TV_sideboard_Dimm.state)
	{
		TV_sideboard_Color.postUpdate(TV_sideboard_hue,TV_sideboard_sat,TV_sideboard_bri)
	}
end

Why am i doing this?
Using the brightness value of the DMX Binding won’t work for me.
It only fades from white to black.
So the color is lost (H/S Value of HSB)

Many Thanks :raised_hands:

2

You have to use

TV_sideboard_Color.sendCommand()

to send a command. .postUpdate will only change the state of the item in openHAB itself.

1 Like
3

Hey Udo,

Well I know what sendCommand does. But the rule above works, using postUpdate. The dimmer item changes. This is not the case using sendCommand within the second rule.

4

Ah, maybe you have to build strings. As you didn’t set val to Int, I guess the val is a primitive.

5

Thats it.
I solved it by building a string containing the HSB Values.

Thank you :slight_smile: