Setpoint for heating not working in KNX2

Add-ons Bindings
1

Hi,
some months ago i migrated to OH3 and KNX2. Everything worked without problems - I thought :wink:

This week I noticed that I can change the target temperatures for the rooms, but they always reset after a short time. This has worked in KNX1. I’ve checked the busmonitor in ETS and recognized that a change on a setpoint item does nothing on the KNX bus

I thing i’ve done something wrong, but i don’t get my mistake…

Hardware is a MDT KNX Interface as TUNNEL, MDT Heatingactuators and temperature sensors in Berker switches.

Konfiguration Things (only for one room):

Bridge knx:ip:bridge [  
    type="TUNNEL", 
    ipAddress="192.168.123.100", 
    localIp="192.168.123.253"
] {
    Thing device generic [
        readInterval=3600
    ] {
        Type number : Temperatur_KG_Buero        "Temperatur Büro"        [ ga="<3/2/0" ]
        Type number : Temperatur_KG_Buero_Set    "Solltemperatur Büro     [ ga="3/2/1+<3/2/4" ]
    }
}

Items:

Number:Temperature    Temperatur_KG_Buero         "Temperatur Büro [%.1f °C]"        <temperatured>    (gTemperaturen, gKG_Buero)     ["Measurement", "Temperature"]    {channel="knx:device:bridge:generic:Temperatur_KG_Buero"}
Number:Temperature    Temperatur_KG_Buero_Set     "Solltemperatur Büro [%.1f °C]"    <heatingc>        (gTemperaturen, gKG_Buero)     ["Setpoint", "Temperature"]       {channel="knx:device:bridge:generic:Temperatur_KG_Buero_Set"}

Sitemap:

Text item=Temperatur_KG_Buero 
Setpoint item=Temperatur_KG_Buero_Set minValue=14 maxValue=25 step=0.5

Can someone give me a hint here?
Thanks

2

This is a number type channel.
You’ve linked it to …

which is not a (plain) Number type Item.
When you send commands, it has units (°C) as part of the command, which the binding cannot handle.

1 Like
3

The KNX from the community marketplace can.

4

I’ve tried this but was confused about undefined state after saving the items. Thanks for support!

5

How to use the marketplace in OH3? In OH2 it works over PaperUI. In MainUI i couldn’t find it…

6

The setting for the temperature now works. But the input reacts very sluggish and also the return values come partly very late or only after a manual reload of the page (BasicUI).

Is this related to the device setting readInterval=3600? Or is this only the case for me?

7

It‘s available in OH 3.2 Milestone 3. If you use 3.1, you can download the file linked in the forum (category marketplace/bundles), drop that in the addons folder and start it with feature:install smarthomej-binding-knx on the openHAB karaf console. Don‘t forget to uninstall the distribution binding before.

1 Like