Möhlenhoff Alpha 2 integration not working properly after upgrading to 2023.12

[fjeldbo]

The problem

No devices (Möhlenhoff base stations) are shown (missing 3 of 3).
Most entities are available, but all control valve entities and battery status entities from one of the base stations are missing (EZR01716D in the log data below).
All climate entities are available and temperatures are updating, so there is contact with the base stations.
Scripts for turning heat on and off are not working, because the devices are missing.

What version of Home Assistant Core has the issue?

core-2023.12.0

What was the last working version of Home Assistant Core?

core-2023.10._

What type of installation are you running?

Home Assistant OS

Integration causing the issue

Möhlenhoff Alpha 2

Link to integration documentation on our website

https://www.home-assistant.io/integrations/moehlenhoff_alpha2

Diagnostics information

No response

Example YAML snippet

SCRIPT SHOULD LOOK LIKE THIS:
set_heating_to_day_mode:
  alias: Set heating to day mode
  sequence:
  - device_id: fe404d01be7b11a05e9ccd915c6f21cf
    domain: climate
    entity_id: climate.kjokken
    type: set_preset_mode
    preset_mode: day
  - device_id: fe404d01be7b11a05e9ccd915c6f21cf
    domain: climate
    entity_id: climate.stue
    type: set_preset_mode
    preset_mode: day
  mode: single

SCRIPT NOW LOOKS LIKE THIS:
alias: Set heating to day mode
sequence:
  - device_id: ""
    domain: ""
    entity_id: ""
  - device_id: ""
    domain: ""
    entity_id: ""
mode: single

Anything in the logs that might be useful for us?

2023-12-07 22:35:54.905 ERROR (MainThread) [homeassistant] Error doing job: Task exception was never retrieved
Traceback (most recent call last):
  File "/usr/src/homeassistant/homeassistant/helpers/entity_platform.py", line 497, in async_add_entities
    tasks = [
            ^
  File "/usr/src/homeassistant/homeassistant/helpers/entity_platform.py", line 497, in <listcomp>
    tasks = [
            ^
  File "/usr/src/homeassistant/homeassistant/components/moehlenhoff_alpha2/sensor.py", line 25, in <genexpr>
    Alpha2HeatControlValveOpeningSensor(coordinator, heat_control_id)
  File "/usr/src/homeassistant/homeassistant/components/moehlenhoff_alpha2/sensor.py", line 48, in __init__
    heat_area = self.coordinator.data["heat_areas"][heat_control["_HEATAREA_ID"]]
                ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
KeyError: 'EZR01716D:6'
2023-12-07 22:35:54.908 ERROR (MainThread) [homeassistant] Error doing job: Task exception was never retrieved
Traceback (most recent call last):
  File "/usr/src/homeassistant/homeassistant/helpers/entity_platform.py", line 497, in async_add_entities
    tasks = [
            ^
  File "/usr/src/homeassistant/homeassistant/helpers/entity_platform.py", line 497, in <listcomp>
    tasks = [
            ^
  File "/usr/src/homeassistant/homeassistant/components/moehlenhoff_alpha2/binary_sensor.py", line 27, in <genexpr>
    Alpha2IODeviceBatterySensor(coordinator, io_device_id)
  File "/usr/src/homeassistant/homeassistant/components/moehlenhoff_alpha2/binary_sensor.py", line 47, in __init__
    heat_area = self.coordinator.data["heat_areas"][io_device["_HEATAREA_ID"]]
                ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^^^^^^^^^^^^^^^^^^^^^^^^^^^
KeyError: 'EZR01716D:6'

Additional information

No response

[home-assistant]

Hey there @j-a-n, mind taking a look at this issue as it has been labeled with an integration (moehlenhoff_alpha2) you are listed as a code owner for? Thanks!

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[j-a-n]

The XML from the alpha2 xml interface appears to contain a valve opening sensor and a battery sensor that refer to a heat area that does not exist.
I will change the integration so that the sensors are ignored in this case.

[fjeldbo]

Thank you, @j-a-n,
I found out that there is something wrong with the mentioned base station (EZR01716D). One of the room sensors is missing, i.e. only 5 of 6 rooms are showing in EZR manager, even after re-connecting the room control unit. The control is connected and is controlling the actuator, but the room will not show in EZR manager, and consequently causing the error with HA. I will try to re-start the base station and possibly do a factory reset.
Anyway, thank you for including the missing sensor check, and thank you for the integration! Much appreciated.