KNX sensor value to MQTT

Configuration
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1

Hi there,

I have potentially a super simple question, but can’t find since today morning a solution.

My house uses KNX and my wallbox MQTT (selfmade). To enable a PV charge (if sun is delivering more power than the house needs), I need to forward three KNX values (current house consumption, etc. …) to the wallbox to operate.

I struggle to get one value (PV_Gesamt) into mqtt. All other values are comming in correct (in MQTT Explorer). In HA, the value is also displayed correctly.

Here is my code I use in automations.yaml:

KNX Werte an MQTT senden

  • alias: KNX PV Leistung an MQTT senden
    trigger:
    platform: state
    entity_id: sensor.solar_leistung_gesamt_knx
    action:
    service: mqtt.publish
    data:
    topic: ‘PV_Gesamt’
    payload: ‘{{ states(“sensor.solar_leistung_gesamt_knx”) }}’
    qos: 1
    retain: true

  • alias: KNX Hausverbrauch Gesamt an MQTT senden
    trigger:
    platform: state
    entity_id: sensor.hausverbrauch_gesamt_knx
    action:
    service: mqtt.publish
    data:
    topic: ‘Hausverbrauch_Gesamt’
    payload: ‘{{ states(“sensor.hausverbrauch_gesamt_knx”) }}’
    qos: 1
    retain: true

Code in knx.yaml:

sensor:

  • name: “solar_leistung_gesamt_knx”
    state_address: “2/0/16” # Ersetze dies durch die Gruppenadresse deines KNX-Sensors
    type: ‘power’ # Ersetze dies durch den Typ deines Sensors (z.B. ‘temperature’, ‘humidity’, etc.)

  • name: “hausverbrauch_gesamt_knx”
    state_address: “2/0/4”
    type: ‘power’

  • name: “pv_ueberschuss_wallbox_knx”
    state_address: “2/0/29”
    type: ‘power’

grafik

Any idea would be great. Thanks in advance!

HA: 2025.1.4