Bump pycoolmasternet-async and add filter and error code support to CoolMastetNet (#84548)

* Add filter and error code support to CoolMastetNet

* Create separate entities

* Remove async_add_entities_for_platform

* Fixed call to async_add_entities

* Avoid using test global

homeassistant/components/coolmaster/sensor.py

@@ -0,0 +1,42 @@
+"""Sensor platform for CoolMasterNet integration."""
+from __future__ import annotations
+
+from homeassistant.components.sensor import SensorEntity, SensorEntityDescription
+from homeassistant.config_entries import ConfigEntry
+from homeassistant.core import HomeAssistant
+from homeassistant.helpers.entity import EntityCategory
+from homeassistant.helpers.entity_platform import AddEntitiesCallback
+
+from .const import DATA_COORDINATOR, DATA_INFO, DOMAIN
+from .entity import CoolmasterEntity
+
+
+async def async_setup_entry(
+    hass: HomeAssistant,
+    config_entry: ConfigEntry,
+    async_add_entities: AddEntitiesCallback,
+) -> None:
+    """Set up the CoolMasterNet sensor platform."""
+    info = hass.data[DOMAIN][config_entry.entry_id][DATA_INFO]
+    coordinator = hass.data[DOMAIN][config_entry.entry_id][DATA_COORDINATOR]
+    async_add_entities(
+        CoolmasterCleanFilter(coordinator, unit_id, info)
+        for unit_id in coordinator.data
+    )
+
+
+class CoolmasterCleanFilter(CoolmasterEntity, SensorEntity):
+    """Representation of a unit's error code."""
+
+    _attr_has_entity_name = True
+    entity_description = SensorEntityDescription(
+        key="error_code",
+        entity_category=EntityCategory.DIAGNOSTIC,
+        name="Error code",
+        icon="mdi:alert",
+    )
+
+    @property
+    def native_value(self) -> str:
+        """Return the error code or OK."""
+        return self._unit.error_code or "OK"