Added sensor unique_id

Sensor became unavailable when Min Renovasjon changed the name of the fraction.

custom_components/min_renovasjon/manifest.json

@@ -10,6 +10,6 @@
   "ssdp": [],
   "zeroconf": [],
   "homekit": {},
-  "version": "0.0.5",
+  "version": "2.1.0",
   "iot_class": "cloud_polling"
 }

custom_components/min_renovasjon/sensor.py

@@ -49,7 +49,6 @@ def __init__(self, min_renovasjon, fraction_id, calendar_list):
         self._fraction_id = int(fraction_id)
         self._available = True
         self._attributes = {}
-        self._attr_unique_id = self.get_name()
 
     @property
     def should_poll(self):
@@ -79,15 +78,17 @@ def extra_state_attributes(self):
     @property
     def name(self):
         """Return the name."""
-        return self.get_name()
-
-    def get_name(self):
         if self._calendar_list is not None:
             for fraction in self._calendar_list:
                 if int(fraction[0]) == self._fraction_id:
                     return fraction[1]
         return None
 
+    @property
+    def unique_id(self) -> str:
+        """Return unique ID."""
+        return "{0}_{1}".format(DOMAIN, self._fraction_id)
+
     @property
     def state(self):
         """Return the state/date of the fraction."""