ioBroker <-> Home Assistant communciation not really working

Hi,
I am right in the middle of switching from an 8 year working ioBroker setup to Home Assistant.
Everything is working fine but I have a problem now.

the transition is taking place bit by bit.
so far I can control all shellys and my PV system.
Everything while ioBroker is still doing its job.
However in order to do the next steps I need to communicate between the systems.

I have a working Zigbee Network that needs to stay on the ioBroker side until everything is working because I control my floor heating system with a giant script in ioBroker.

I managed to publish the needed objects from ioBroker to Home Assistant but I am not able to control anything. from HA and send it to ioBroker.

The best example is
I have 6 temp sensors in zigbee and 6 switches that are controlling the valves.
I can read the temperatures and see the switch states via MQTT in ha but cannot control the switches.

this is my configuration.yaml

mqtt:
  sensor:
    - name: "ioBroker temp livingroom"
      state_topic: "ioBroker/temp_livingroom"
  switch:
    - name: "ioBroker valve livingroom"
      state_topic: "ioBroker/valve_livingroom"
      command_topic: "ioBroker/valve_livingroom"
      payload_on: "true"
      payload_off: "false"
      qos: 0
      retain: true

I set up a mqqtclient on the iobroker side, an its working so far.
however iobroker does not listen to anything I send it.

what can I doo to tackle the problem. Do you need further information?

You can install MQTT Explorer on your PC, that way you can test if the topic and payload is correct. Its the best way to debug/test to check your config.

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totally stuck on what to do with that mqtt explorer

In what way are you stuck? Unable to login to the broker?
Or just a general not understanding of how to use it?

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I am unsure what to input there in the explorer on Linux.

I decided not to pursue this problem any further ioBroker must die! :wink:

I will help by getting values from HASS to iooBroker and switch the 4 needesd shellies directly until I figure out an automation.