How do I use members of an equipment group in a custom widget?

Setup, Configuration and Use Runtime
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1

Hello all,

I am in the process of creating my first widget. The widget should access the members of the group gKuecheHVAC. I tried in the widget code to access the group member nKuecheSoll via props.item+“_nKuecheSoll” (The groupitem gKuecheHVAC was assigned to the parameter item). Unfortunately, this does not work for me. Does this not work in general or do you have any idea what I am doing wrong here?

The group is created as follows:

Group                       gKuecheHVAC                         "Küche Fußbodenheizung"                  <temperature>   (gKueche)           ["HVAC"]
Number                      nKuechentemperatur                  "Temperatur Küche [%.1f °C]"             <temperature>   (gKuecheHVAC)       ["Measurement", "Temperature"]          { channel="knx:device:bridge:dTastsensorKueche:Temperatur" }
Number                      nKuecheSoll                         "Soll [%.1f °C]"                         <temperature>   (gKuecheHVAC)       ["Setpoint", "Temperature"]             {channel="knx:device:bridge:dHeizaktorEG:T_Kueche_Soll"}
Number                      nKuecheStellwert                    "Stellwert Küche in % [%.1f %%]"         <temperature>   (gKuecheHVAC)       ["OpenLevel", "Valve"]                  {channel="knx:device:bridge:dHeizaktorEG:T_Kueche_Stellwert"}
Number                      nHVACMode                           "HVAC Betriebsart [%d]"                  <temperature>   (gKuecheHVAC)       ["HVAC"]                                {channel="knx:device:bridge:dHeizaktorEG:HVAC_Kueche_Status"}
Number                      nHVACState                          "HVAC Status [%d]"                       <temperature>   (gKuecheHVAC)       ["HVAC"]                                {channel="knx:device:bridge:dHeizaktorEG:HVAC_Kueche_Status"}

uid: ATest
tags: []
props:
  parameters:
    - description: Titelzeile
      label: Titel (wenn leer, dann Gerätename)
      name: titel
      required: false
      type: TEXT
    - context: item
      description: Thermostat Item
      label: Item
      name: item
      required: true
      type: TEXT
timestamp: Dec 15, 2022, 8:18:27 PM
component: f7-card
config:
slots:
  content:
    - component: oh-stepper-card
      config:
        noShadow: true
        color-theme: gray
        item: = props.item+"_nKuecheSoll"
        min: 5
        max: 30
        step: 0.5
    - component: f7-card
      config:
        title: '=(props.item) ? "State of " + props.item : "Set props to test!"'
        footer: =props.prop1
        content: =items[props.item+"_nKuecheSoll"].state

I would be grateful for any advice.

2

This just creates a string that equals “gKuecheHVAC_nKuecheSoll” which is not a viable name for any of your items.

There are two standard ways to do this:

  1. Create a naming scheme that is consistent enough that you can use a simple string formula to crate the name of each item. So in this case, you would want the name of your temperature item to be something like “gKuecheHVAC_Temperatur” so that you could use the formula:
props.item + "_Temperatur"
  1. The oh-repeater component has an option to iterate through all the members of a group. This will be a little different than you are doing above because then you will be inside the repeater loop and each of the returned objects is the whole item, not just the name.
3

Thank you very much for your help.
I was thinking in completely the wrong direction here. But now I understand how this works