Missing 'hvac_mode' in bsblan.py

[fuimsr]

Describe the bug
In homeassistant BSB-LAN throws an error while trying to initialize LPB and PPS devices.

Debug mode reveals the exact issue:

2025-12-10 14:51:46.205 WARNING (MainThread) [bsblan.bsblan] min_temp not available from device, temperature range will be None
2025-12-10 14:51:46.205 WARNING (MainThread) [bsblan.bsblan] max_temp not available from device, temperature range will be None
2025-12-10 14:51:47.087 ERROR (MainThread) [homeassistant.components.bsblan] Unexpected error fetching bsblan_fast_192.168.XXX.XXX data
Traceback (most recent call last):
  File "/usr/src/homeassistant/homeassistant/helpers/update_coordinator.py", line 419, in _async_refresh
    self.data = await self._async_update_data()
                ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/usr/src/homeassistant/homeassistant/components/bsblan/coordinator.py", line 100, in _async_update_data
    state = await self.client.state()
            ^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/usr/local/lib/python3.13/site-packages/bsblan/bsblan.py", line 564, in state
    data["hvac_mode"]["value"] = HVAC_MODE_DICT[int(data["hvac_mode"]["value"])]
                                                    ~~~~^^^^^^^^^^^^^
KeyError: 'hvac_mode'

Device 1 (PPS):

Device 2 (LPB):

Home Assistant OS
Core 2025.12.2
Supervisor 2025.12.3
Operating System 16.3
Frontend 20251203.2

To Reproduce
Configure a BSB-LAN device and try to connect it to home assistant via the https://www.home-assistant.io/integrations/bsblan plugin.

Additional context
I've previously commented about this issue in the home assistant repository issues: home-assistant/core#152146 (comment) but it seems to be better suited here

[liudger]

Need to check how I solve this. BSBLAN lib need some extensive rework for this. Maybe some vibe coding could do the trick.
Thanks for the issue.

ps I am gonna move and my new heating system won't be using bsblan. So the development will be limited in the future. Don't get the hopes up too much.

[fuimsr]

Thanks for the quick and honest reply. Can you recommend an alternative integration? Do you want me to help you move in exchange for a non-vibe-coded update?

[liudger]

You can check the forum. There is a YouTube about mqtt setup for bsblan. This is made by the author of bsblan board

[liudger]

For development. You can look into the constant file and add the parameters you need? Do a pull request if you can or send me the file. @fuimsr