KNX - Dimming Control LED driver

Hello,

I’m trying to control my LED strip through the KNX hub. The strip is connected to a dimmable LED driver (constant voltage) which I can control through a Zennio Z35. This has an on/off button and percentage control to dim. The only problem is that I can’t control the LED itself, only set percentage in the display.

The LED has address 1/7/40 and from the Group Monitor I can see that Payload value is sent as hex, and the LED is turned either on with the percentage or off.

206 12:52:31.456 1.1.8 1/7/40 GroupValueWrite Incoming 0x8a

But when I try to send the value from Home Assistant, I get the following:
The percentage is updated in the display, but the LED is not turned on.

366 13:16:04.353 15.15.250 Home Assistant 1/7/40 GroupValueResponse outgoing 0x80

As this only has one address, what is the correct configuration in my knx.yaml? It would be nice to be able to control this LED strip similar to all my other lights in the house:

But these have all addresses needed (snippet from .yml):

lights:
-   name: "Bad 2. etg"
    address: "1/5/0"
    state_address: "1/5/1"
    brightness_address: "1/5/3"
    brightness_state_address: "1/5/4"

-   name: "Loft lys"
    address: "1/7/40"

expose:
-   type: percent
    entity_id: light.lys_loft
    #attribute: brightness
    #default: 0
    address: "1/7/40"

Any suggestions?

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