Entity has no attributes

[wapebira]

This is my config,
sensor:

• platform: meteorologic_metrics
  name: "Meteorologic Metrics" # optional, use if you want to use mulitple instances
  temp: sensor.lumi_weather_outside_temperature_01 # celsius
  hum: sensor.lumi_weather_outside_humidity_01 # celsius
  dew: sensor.acasa_dew_point # required if you want WBT estimated with dewpoint depression
  pressure: sensor.lumi_weather_outside_pressure_01

getting no attributes but just "Unknown"

from the logs

`Logger: homeassistant
Source: custom_components/meteorologic_metrics/helpers.py:9
Integration: meteorologic_metrics (documentation)
First occurred: 08:51:39 (25 occurrences)
Last logged: 09:03:39

Error doing job: Task exception was never retrieved
Traceback (most recent call last):
File "/usr/src/homeassistant/homeassistant/helpers/entity_platform.py", line 734, in _update_entity_states
await asyncio.gather(*tasks)
File "/usr/src/homeassistant/homeassistant/helpers/entity.py", line 492, in async_update_ha_state
self._async_write_ha_state()
File "/usr/src/homeassistant/homeassistant/helpers/entity.py", line 541, in _async_write_ha_state
extra_state_attributes = self.extra_state_attributes
File "/config/custom_components/meteorologic_metrics/sensor.py", line 83, in extra_state_attributes
"SI wet bulb temp C": round(toC(S[5]), 2),
File "/config/custom_components/meteorologic_metrics/helpers.py", line 9, in toC
return celsius - KELVIN_CONVERSION
TypeError: unsupported operand type(s) for -: 'NoneType' and 'float'`

[danobot]

It looks like the other sensors have Unknown values as well, this is what is causing the NoneType error.