[SOLVED] Wrong [GroupItemStateChangedEvent] line on temperature change

The internal sensor of a KNX sends a temperature value to the KNX bus. The temperature is updated properly on all KNX devices and also on the Openhab2 UI (browser and mobile apps).
Considering that the real new temperature value is 23.06 degree, I do not understand why in the events log file I get strange values for the [GroupItemStateChangedEvent] line:

2018-01-06 08:57:11.624 [ome.event.ItemCommandEvent] - Item ‘Temperature_Apartment_Apartment’ received command 23.06
2018-01-06 08:57:11.637 [GroupItemStateChangedEvent] - Temperature changed from 61.8058333333333334 to 61.8166666666666668 through Temperature_Apartment_Apartment
2018-01-06 08:57:11.641 [vent.ItemStateChangedEvent] - Temperature_Apartment_Apartment changed from 22.8 to 23.06

Items:
Number Temperature_Apartment_Apartment “Appartamento [%.1f °C]” (Temperature, Room_Apartment) {knx = “<7/3/30”}

Sitemap:
Text label=“RISCALDAMENTO” icon=“temperature” {Text item=Temperature_Apartment_Apartment}

OH2 version: 2.2.0-1
KNX binding: 1.9

Thanks,
Alex

I don’t know your group definition. Have you used AVG or SUM?
https://docs.openhab.org/configuration/items.html

Harry,

I used AVG.
Here’s the group definition:
Group:Number:AVG Temperature “Avg. Room Temp. [%.1f °C]” (Status)

Thanks,
Alex