Invalid literal for int for `DATA_SLAVE_MAX_CAPACITY` when not connected to thermostat / boiler

[DenSinH]

Coming from this issue: rvdbreemen/OTGW-firmware#270. Basically, when I had my presoldered, preconfigured OTGW from nodo shop turned on without being connected to a boiler / thermostat (to make sure I could load it in HA before physically installing it), I got this error when loading it in Home Assistant with the OTGW integration:

Traceback (most recent call last):
  File "/usr/src/homeassistant/homeassistant/config_entries.py", line 761, in __async_setup_with_context
    result = await component.async_setup_entry(hass, self)
             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/usr/src/homeassistant/homeassistant/components/opentherm_gw/__init__.py", line 75, in async_setup_entry
    await gateway.connect_and_subscribe()
  File "/usr/src/homeassistant/homeassistant/components/opentherm_gw/__init__.py", line 119, in connect_and_subscribe
    status = await self.gateway.connect(self.device_path)
             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/usr/local/lib/python3.13/site-packages/pyotgw/pyotgw.py", line 58, in connect
    await self.get_status()
  File "/usr/local/lib/python3.13/site-packages/pyotgw/pyotgw.py", line 270, in get_status
    boiler_status, thermostat_status = process_statusfields_v4(fields)
                                       ~~~~~~~~~~~~~~~~~~~~~~~^^^^^^^^
  File "/usr/local/lib/python3.13/site-packages/pyotgw/pyotgw.py", line 806, in process_statusfields_v4
    v.DATA_SLAVE_MAX_CAPACITY: int(capmodlimits[0]),
                               ~~~^^^^^^^^^^^^^^^^^
ValueError: invalid literal for int() with base 10: '0.00'

It seems it gets some default value from the gateway, which is not an int. Not sure if this should be an issue here or on the firmware of the OTGW.

[mvn23]

Thanks for the report. Did this happen only once or does it happen every time you try to connect? The comment by @hvxl here is basically spot-on. We're parsing the response to the PS=1 command for initial values, which should not change its format based on whether or not a boiler and/or thermostat is connected. If it happens every time I would appreciate a debug log from Home Assistant.