Add device info to edl21 (#89070)

* Added device info for edl21.

* Apply suggestions from code review

homeassistant/components/edl21/sensor.py

@@ -32,6 +32,7 @@ from homeassistant.helpers.dispatcher import (
     async_dispatcher_connect,
     async_dispatcher_send,
 )
+from homeassistant.helpers.entity import DeviceInfo
 from homeassistant.helpers.entity_platform import AddEntitiesCallback
 from homeassistant.helpers.issue_registry import IssueSeverity, async_create_issue
 from homeassistant.helpers.typing import ConfigType, DiscoveryInfoType
@@ -283,7 +284,7 @@ async def async_setup_platform(
         hass,
         DOMAIN,
         "deprecated_yaml",
-        breaks_in_ha_version="2023.2.0",
+        breaks_in_ha_version="2023.5.0",
         is_fixable=False,
         severity=IssueSeverity.WARNING,
         translation_key="deprecated_yaml",
@@ -397,7 +398,7 @@ class EDL21:
             old_entity_id = registry.async_get_entity_id(
                 "sensor", DOMAIN, entity.old_unique_id
             )
-            if old_entity_id is not None:
+            if old_entity_id is not None and entity.unique_id is not None:
                 LOGGER.debug(
                     "Migrating unique_id from [%s] to [%s]",
                     entity.old_unique_id,
@@ -422,8 +423,6 @@ class EDL21Entity(SensorEntity):
         """Initialize an EDL21Entity."""
         self._electricity_id = electricity_id
         self._obis = obis
-        self._name = name
-        self._unique_id = f"{electricity_id}_{obis}"
         self._telegram = telegram
         self._min_time = MIN_TIME_BETWEEN_UPDATES
         self._last_update = utcnow()
@@ -435,6 +434,12 @@ class EDL21Entity(SensorEntity):
         }
         self._async_remove_dispatcher = None
         self.entity_description = entity_description
+        self._attr_name = name
+        self._attr_unique_id = f"{electricity_id}_{obis}"
+        self._attr_device_info = DeviceInfo(
+            identifiers={(DOMAIN, self._electricity_id)},
+            name=self._electricity_id,
+        )
 
     async def async_added_to_hass(self) -> None:
         """Run when entity about to be added to hass."""
@@ -466,21 +471,11 @@ class EDL21Entity(SensorEntity):
         if self._async_remove_dispatcher:
             self._async_remove_dispatcher()
 
-    @property
-    def unique_id(self) -> str:
-        """Return a unique ID."""
-        return self._unique_id
-
     @property
     def old_unique_id(self) -> str:
         """Return a less unique ID as used in the first version of edl21."""
         return self._obis
 
-    @property
-    def name(self) -> str | None:
-        """Return a name."""
-        return self._name
-
     @property
     def native_value(self) -> str:
         """Return the value of the last received telegram."""