I found some topics about this in KNX user forum, but no real idea how to solve globally.
Can somebody tell me how to handle DPT 9.001 temperature values coming from KNX nicely?
I need to use state description everywhere, but would like to rather have the rounded value in the number item itself.
e.g. channel definion
- id: EG_Buero_Temperaturmesswert
channelTypeUID: knx:number
label: EG Büro Temperaturmesswert
description: null
configuration:
ga: 9.001:<4/1/20
In the thirdparty smarthome-j marketplace there is a rounding profile that can round values before they get to the Item. You could also use a JS Transformation to do the same.
In neither case will it be easier than setting the State Description metadata though. You’ll have to do it one Item at a time.
It actually show up with many zeroes in the ui.
I would need to format there again.
Here an example from another room where I used state description as well:
- component: oh-slider-cell
config:
footer: ="Istwert " +
items["KNXTemperaturen_OGAnkleideTemperaturmesswert"].state
icon: oh:temperature
item: KNXHeizaktor_OGAnkleideHeizen
label: true
max: 24
min: 18
releaseOnly: true
scale: true
scaleSteps: 1
scaleSubSteps: 2
step: 0.5
subtitle: ="Sollwert " + items["KNXHeizaktor_OGAnkleideHeizen"].state
title: Ankleide
unit: ="°C"
vertical: 0
I might check the rouding profile or JS transformation.
You need to use .displayState instead of .state in your widgets to get the transformed version defined by the state description pattern.
items["KNXTemperaturen_OGAnkleideTemperaturmesswert"].displayState
Thank you, now I can peacefully go to bed for today 
I have another problem with state description.
When I use “displayState” and in State description pattern “%.1f %unit%” or “%.1f °C” it will show up as “undefined” for >some< items.
If I remove the “°” it will work, e.g. “”%.1f C". What the hack?
Is there a pattern for the Items that are showing as undefined? Are plain Numbers without units (for example)?
Yes, thank you for helping with my beginner questions.
The pattern for the undefined is same as for those which are shown.
If I change the item type to “basic Number” (without dimension) it would work as well. Is this the solution?
Not necessarily. Just trying to figure out what’s different about the Items that don’t work compared to the Items that do work.
When you removed the ° you ended up with an invalid unit. The fact that it worked in that case could have been because your Item didn’t have units in the first place. But if they have units that’s not the difference.
People have in the past run into problems trying to use the “wrong” symbol character, take care to use the correct “°”, copy-paste from a good example if necessary.
somehow I need to put two spaces in state description.
This was the difference between the working and not working.
Now I put everywhere two spaces “%.1f °C” and it works.
The funny thing is that it is displayed with one space on the page.
So I’m fine 
config:
label: Temperaturen / Luftfeuchte
layoutType: responsive
sidebar: true
blocks:
- component: oh-block
config: {}
slots:
default:
- component: oh-grid-cells
config: {}
slots:
default:
- component: oh-cell
config:
action: toggle
actionCommand: ON
actionCommandAlt: OFF
actionItem: KNXHeizaktor_Heizen1Kuhlen0
color: "=(items.KNXHeizaktor_Heizen1Kuhlen0.displayState == 'ON') ? 'red' :
'blue'"
header: Kühlen / Heizen
icon: "=(items.KNXHeizaktor_Heizen1Kuhlen0.displayState == 'ON') ? 'oh:fire' :
'oh:snow'"
item: KNXHeizaktor_Heizen1Kuhlen0
on: true
stateAsHeader: true
title: "=(items.KNXHeizaktor_Heizen1Kuhlen0.displayState == 'ON') ? 'Heizen' :
'Kühlen'"
- component: oh-block
config:
title: Erdgeschoss
slots:
default:
- component: oh-grid-cells
config: {}
slots:
default:
- component: oh-slider-cell
config:
footer: ="Istwert " +
items["KNXTemperaturen_EGAbstellTemperaturmesswert"].displayState
icon: oh:temperature
item: Heizaktor_EGAbstellHeizen
label: true
max: 24
min: 18
releaseOnly: true
scale: true
scaleSteps: 1
scaleSubSteps: 2
step: 0.5
subtitle: ="Sollwert " + items["Heizaktor_EGAbstellHeizen"].displayState
title: Abstellraum
unit: ="°C"
vertical: 0
- component: oh-slider-cell
config:
footer: ="Istwert " +
items["KNXTemperaturen_EGGastebadTemperaturmesswert"].displayState
icon: oh:temperature
item: KNXHeizaktor_EGGastebadHeizen
label: true
max: 24
min: 18
releaseOnly: true
scale: true
scaleSteps: 1
scaleSubSteps: 2
step: 0.5
subtitle: ="Sollwert " + items["KNXHeizaktor_EGGastebadHeizen"].displayState
title: Gästebad
unit: ="°C"
vertical: 0
- component: oh-slider-cell
config:
footer: ="Istwert " +
items["KNXTemperaturen_EGBuroTemperaturmesswert"].displayState
icon: oh:temperature
item: KNXHeizaktor_EGBuroHeizen
label: true
max: 24
min: 18
releaseOnly: true
scale: true
scaleSteps: 1
scaleSubSteps: 2
step: 0.5
subtitle: ="Sollwert " + items["KNXHeizaktor_EGBuroHeizen"].displayState
title: Büro
unit: ="°C"
vertical: 0
- component: oh-slider-cell
config:
footer: ="Istwert " +
items["KNXTemperaturen_EGWohnenTemperaturmesswert"].displayState
icon: oh:temperature
item: KNXHeizaktor_EGWohnenHeizen
label: true
max: 24
min: 18
releaseOnly: true
scale: true
scaleSteps: 1
scaleSubSteps: 2
step: 0.5
subtitle: ="Sollwert " + items["KNXHeizaktor_EGWohnenHeizen"].displayState
title: Wohnen
unit: ="°C"
vertical: 0
- component: oh-slider-cell
config:
footer: ="Istwert " +
items["KNXTemperaturen_EGKucheTemperaturmesswert"].displayState
icon: oh:temperature
item: KNXHeizaktor_EGKucheHeizen
label: true
max: 24
min: 18
releaseOnly: true
scale: true
scaleSteps: 1
scaleSubSteps: 2
step: 0.5
subtitle: ="Sollwert " + items["KNXHeizaktor_EGKucheHeizen"].displayState
title: Küche
unit: ="°C"
vertical: 0
- component: oh-slider-cell
config:
footer: ="Istwert " +
items["KNXTemperaturen_EGWindfangTemperaturmesswert"].displayState
icon: oh:temperature
item: KNXHeizaktor_EGWindfangHeizen
label: true
max: 24
min: 18
releaseOnly: true
scale: true
scaleSteps: 1
scaleSubSteps: 2
step: 0.5
subtitle: ="Sollwert " + items["KNXHeizaktor_EGWindfangHeizen"].displayState
title: Windfang
unit: ="°C"
vertical: 0
- component: oh-cell
config:
header: Flur
icon: oh:temperature
subtitle: ="Istwert " +
items["KNXTemperaturen_EGFlurTemperaturmesswert"].displayState
title: Sollwert n/a
- component: oh-block
config:
title: Obergeschoss
slots:
default:
- component: oh-grid-cells
config: {}
slots:
default:
- component: oh-slider-cell
config:
footer: ="Istwert " +
items["KNXTemperaturen_OGBadTemperaturmesswert"].displayState
icon: oh:temperature
item: KNXHeizaktor_OGBadHeizen
label: true
max: 24
min: 18
releaseOnly: true
scale: true
scaleSteps: 1
scaleSubSteps: 2
step: 0.5
subtitle: ="Sollwert " + items["KNXHeizaktor_OGBadHeizen"].displayState
title: Bad
unit: ="°C"
vertical: 0
- component: oh-slider-cell
config:
footer: ="Istwert " +
items["KNXTemperaturen_OGAnkleideTemperaturmesswert"].displayState
icon: oh:temperature
item: KNXHeizaktor_OGAnkleideHeizen
label: true
max: 24
min: 18
releaseOnly: true
scale: true
scaleSteps: 1
scaleSubSteps: 2
step: 0.5
subtitle: ="Sollwert " + items["KNXHeizaktor_OGAnkleideHeizen"].displayState
title: Ankleide
unit: ="°C"
vertical: 0
- component: oh-slider-cell
config:
footer: ="Istwert " +
items["KNXTemperaturen_OGSchlafenTemperaturmesswert"].displayState
icon: oh:temperature
item: KNXHeizaktor_OGSchlafenHeizen
label: true
max: 24
min: 18
releaseOnly: true
scale: true
scaleSteps: 1
scaleSubSteps: 2
step: 0.5
subtitle: ="Sollwert " + items["KNXHeizaktor_OGSchlafenHeizen"].displayState
title: Schlafen
unit: ="°C"
vertical: 0
- component: oh-slider-cell
config:
footer: ="Istwert " +
items["KNXTemperaturen_OGKindOstTemperaturmesswert"].displayState
icon: oh:temperature
item: KNXHeizaktor_OGKindOstHeizen
label: true
max: 24
min: 18
releaseOnly: true
scale: true
scaleSteps: 1
scaleSubSteps: 2
step: 0.5
subtitle: ="Sollwert " + items["KNXHeizaktor_OGKindOstHeizen"].displayState
title: Kind Ost
unit: ="°C"
vertical: 0
- component: oh-slider-cell
config:
footer: ="Istwert " +
items["KNXTemperaturen_OGHWRTemperaturmesswert"].displayState
icon: oh:temperature
item: KNXHeizaktor_OGHWRHeizen
label: true
max: 24
min: 18
releaseOnly: true
scale: true
scaleSteps: 1
scaleSubSteps: 2
step: 0.5
subtitle: ="Sollwert " + items["KNXHeizaktor_OGHWRHeizen"].displayState
title: HWR
unit: ="°C"
vertical: 0
- component: oh-slider-cell
config:
footer: ="Istwert " +
items["KNXTemperaturen_OGKindWestTemperaturmesswert"].displayState
icon: oh:temperature
item: KNXHeizaktor_OGKindWestHeizen
label: true
max: 24
min: 18
releaseOnly: true
scale: true
scaleSteps: 1
scaleSubSteps: 2
step: 0.5
subtitle: ="Sollwert " + items["KNXHeizaktor_OGKindWestHeizen"].displayState
title: Kind West
unit: ="°C"
vertical: 0
- component: oh-cell
config:
header: Flur
subtitle: ="Istwert " +
items["KNXTemperaturen_OGFlurTemperaturmesswert"].displayState
title: Sollwert n/a
- component: oh-block
config:
title: Luftfeuchtigkeit
slots:
default:
- component: oh-grid-cells
config: {}
slots:
default:
- component: oh-label-cell
config:
header: Luftfeuchtigkeit Büro
icon: oh:humidity
item: KNXMesswerteTemperaturLuftfeuchtigkeit_EGBuroLuftfeuchtigkeit
- component: oh-label-cell
config:
header: Luftfeuchtigkeit Wohnen
icon: oh:humidity
item: KNXMesswerteTemperaturLuftfeuchtigkeit_EGWohnenLuftfeuchtigkeit
- component: oh-label-cell
config:
header: Luftfeuchtigkeit Schlafen
icon: oh:humidity
item: KNXMesswerteTemperaturLuftfeuchtigkeit_OGSchlafenLuftfeuchtigkeit
masonry: null
grid: []
canvas: null
This is smelling of some kind of bug. It should work with no space characters “%.1f°C”, let alone one space.
I suspect this might be at the widget, more than server end.