Add sensors to Yoto

Add the sensor platform: battery, card slot and day mode, plus power
source, SSID and Wi-Fi RSSI as diagnostics (RSSI disabled by default).

Move the online check to the base entity so all entities (including the
media player) report unavailable when the player is offline.

homeassistant/components/yoto/__init__.py

@@ -14,7 +14,7 @@ from homeassistant.helpers.config_entry_oauth2_flow import (
 from .const import DOMAIN
 from .coordinator import YotoConfigEntry, YotoDataUpdateCoordinator
 
-PLATFORMS: list[Platform] = [Platform.MEDIA_PLAYER]
+PLATFORMS: list[Platform] = [Platform.MEDIA_PLAYER, Platform.SENSOR]
 
 
 async def async_setup_entry(hass: HomeAssistant, entry: YotoConfigEntry) -> bool:

homeassistant/components/yoto/coordinator.py

@@ -128,10 +128,9 @@ class YotoDataUpdateCoordinator(DataUpdateCoordinator[dict[str, YotoPlayer]]):
         """Ask each player to push a fresh status snapshot over MQTT."""
         if not self.client.is_mqtt_connected:
             return
-        # Fire-and-forget: the data/status response lands via the on_update
-        # callback later, which already triggers async_set_updated_data.
         for device_id in list(self.client.players):
             await self.client.request_player_status(device_id)
+            await self.client.request_player_extended_status(device_id)
 
     def _mqtt_event(self, _player: YotoPlayer) -> None:
         """Handle a real-time update pushed by the Yoto MQTT broker."""

homeassistant/components/yoto/entity.py

@@ -43,4 +43,8 @@ class YotoEntity(CoordinatorEntity[YotoDataUpdateCoordinator]):
     @property
     def available(self) -> bool:
         """Return if the entity is available."""
-        return super().available and self._player_id in self.coordinator.data
+        return (
+            super().available
+            and self._player_id in self.coordinator.data
+            and bool(self.player.is_online)
+        )

homeassistant/components/yoto/icons.json

@@ -0,0 +1,28 @@
+{
+  "entity": {
+    "sensor": {
+      "card_insertion_state": {
+        "default": "mdi:card-bulleted-outline",
+        "state": {
+          "none": "mdi:card-bulleted-off-outline",
+          "physical": "mdi:card-bulleted",
+          "remote": "mdi:cast-audio",
+          "streaming": "mdi:radio-tower"
+        }
+      },
+      "day_mode": {
+        "default": "mdi:theme-light-dark",
+        "state": {
+          "day": "mdi:weather-sunny",
+          "night": "mdi:weather-night"
+        }
+      },
+      "power_source": {
+        "default": "mdi:power-plug"
+      },
+      "ssid": {
+        "default": "mdi:router-wireless"
+      }
+    }
+  }
+}

homeassistant/components/yoto/media_player.py

@@ -82,11 +82,6 @@ class YotoMediaPlayer(YotoEntity, MediaPlayerEntity):
         super().__init__(coordinator, player)
         self._attr_unique_id = player.id
 
-    @property
-    def available(self) -> bool:
-        """Return whether the player is reachable through the Yoto cloud."""
-        return super().available and bool(self.player.is_online)
-
     @property
     def state(self) -> MediaPlayerState:
         """Return the playback state."""

homeassistant/components/yoto/quality_scale.yaml

@@ -57,20 +57,12 @@ rules:
   docs-troubleshooting: todo
   docs-use-cases: todo
   dynamic-devices: todo
-  entity-category:
-    status: exempt
-    comment: Only the media_player entity ships in this PR; no diagnostic entities yet.
+  entity-category: done
   entity-device-class: done
-  entity-disabled-by-default:
-    status: exempt
-    comment: Only the media_player entity ships in this PR; no entities are disabled by default.
-  entity-translations:
-    status: exempt
-    comment: The media_player uses the device name; no translatable strings yet.
+  entity-disabled-by-default: done
+  entity-translations: done
   exception-translations: done
-  icon-translations:
-    status: exempt
-    comment: No custom icon translations are needed yet.
+  icon-translations: done
   reconfiguration-flow:
     status: exempt
     comment: Authorization is the only configuration; reauth covers re-linking the account.

homeassistant/components/yoto/sensor.py

@@ -0,0 +1,130 @@
+"""Sensor platform for the Yoto integration."""
+
+from collections.abc import Callable
+from dataclasses import dataclass
+
+from yoto_api import CardInsertionState, DayMode, PowerSource, YotoPlayer
+
+from homeassistant.components.sensor import (
+    SensorDeviceClass,
+    SensorEntity,
+    SensorEntityDescription,
+    SensorStateClass,
+)
+from homeassistant.const import (
+    PERCENTAGE,
+    SIGNAL_STRENGTH_DECIBELS_MILLIWATT,
+    EntityCategory,
+)
+from homeassistant.core import HomeAssistant
+from homeassistant.helpers.entity_platform import AddConfigEntryEntitiesCallback
+from homeassistant.helpers.typing import StateType
+
+from .coordinator import YotoConfigEntry, YotoDataUpdateCoordinator
+from .entity import YotoEntity
+
+PARALLEL_UPDATES = 0
+
+
+def _enum_state(value: CardInsertionState | PowerSource | None) -> str | None:
+    """Return an enum member as a lowercase string, or None if unset."""
+    return value.name.lower() if value is not None else None
+
+
+def _day_mode_state(value: DayMode | None) -> str | None:
+    """Return day/night, treating the firmware's UNKNOWN as unset."""
+    if value is None or value is DayMode.UNKNOWN:
+        return None
+    return value.name.lower()
+
+
+@dataclass(frozen=True, kw_only=True)
+class YotoSensorEntityDescription(SensorEntityDescription):
+    """Describes a Yoto sensor entity."""
+
+    value_fn: Callable[[YotoPlayer], StateType]
+
+
+SENSORS: tuple[YotoSensorEntityDescription, ...] = (
+    YotoSensorEntityDescription(
+        key="battery_level",
+        device_class=SensorDeviceClass.BATTERY,
+        native_unit_of_measurement=PERCENTAGE,
+        state_class=SensorStateClass.MEASUREMENT,
+        value_fn=lambda player: player.status.battery_level_percentage,
+    ),
+    YotoSensorEntityDescription(
+        key="card_insertion_state",
+        translation_key="card_insertion_state",
+        device_class=SensorDeviceClass.ENUM,
+        options=[state.name.lower() for state in CardInsertionState],
+        value_fn=lambda player: _enum_state(player.status.card_insertion_state),
+    ),
+    YotoSensorEntityDescription(
+        key="day_mode",
+        translation_key="day_mode",
+        device_class=SensorDeviceClass.ENUM,
+        options=["day", "night"],
+        value_fn=lambda player: _day_mode_state(player.status.day_mode),
+    ),
+    YotoSensorEntityDescription(
+        key="power_source",
+        translation_key="power_source",
+        device_class=SensorDeviceClass.ENUM,
+        options=[source.name.lower() for source in PowerSource],
+        entity_category=EntityCategory.DIAGNOSTIC,
+        value_fn=lambda player: _enum_state(player.extended_status.power_source),
+    ),
+    YotoSensorEntityDescription(
+        key="ssid",
+        translation_key="ssid",
+        entity_category=EntityCategory.DIAGNOSTIC,
+        value_fn=lambda player: player.extended_status.network_ssid,
+    ),
+    YotoSensorEntityDescription(
+        key="wifi_rssi",
+        translation_key="wifi_rssi",
+        device_class=SensorDeviceClass.SIGNAL_STRENGTH,
+        native_unit_of_measurement=SIGNAL_STRENGTH_DECIBELS_MILLIWATT,
+        state_class=SensorStateClass.MEASUREMENT,
+        entity_category=EntityCategory.DIAGNOSTIC,
+        entity_registry_enabled_default=False,
+        value_fn=lambda player: player.extended_status.wifi_strength,
+    ),
+)
+
+
+async def async_setup_entry(
+    hass: HomeAssistant,
+    entry: YotoConfigEntry,
+    async_add_entities: AddConfigEntryEntitiesCallback,
+) -> None:
+    """Set up the Yoto sensor platform."""
+    coordinator = entry.runtime_data
+    async_add_entities(
+        YotoSensor(coordinator, player, description)
+        for player in coordinator.client.players.values()
+        for description in SENSORS
+    )
+
+
+class YotoSensor(YotoEntity, SensorEntity):
+    """Representation of a Yoto player sensor."""
+
+    entity_description: YotoSensorEntityDescription
+
+    def __init__(
+        self,
+        coordinator: YotoDataUpdateCoordinator,
+        player: YotoPlayer,
+        description: YotoSensorEntityDescription,
+    ) -> None:
+        """Initialize the sensor."""
+        super().__init__(coordinator, player)
+        self.entity_description = description
+        self._attr_unique_id = f"{player.id}_{description.key}"
+
+    @property
+    def native_value(self) -> StateType:
+        """Return the sensor value."""
+        return self.entity_description.value_fn(self.player)

homeassistant/components/yoto/strings.json

@@ -30,6 +30,41 @@
       }
     }
   },
+  "entity": {
+    "sensor": {
+      "card_insertion_state": {
+        "name": "Card slot",
+        "state": {
+          "none": "Empty",
+          "physical": "Physical card",
+          "remote": "Remote",
+          "streaming": "Streaming"
+        }
+      },
+      "day_mode": {
+        "name": "Day mode",
+        "state": {
+          "day": "Day",
+          "night": "Night"
+        }
+      },
+      "power_source": {
+        "name": "Power source",
+        "state": {
+          "battery": "Battery",
+          "qi_dock": "Wireless dock",
+          "usb_c": "USB-C",
+          "v2_dock": "Dock"
+        }
+      },
+      "ssid": {
+        "name": "SSID"
+      },
+      "wifi_rssi": {
+        "name": "Wi-Fi RSSI"
+      }
+    }
+  },
   "exceptions": {
     "card_detail_failed": {
       "message": "Could not load Yoto card details: {error}"

tests/components/yoto/conftest.py

@@ -9,12 +9,17 @@ import jwt
 import pytest
 from yoto_api import (
     Card,
+    CardInsertionState,
     Chapter,
+    DayMode,
     Device,
     Group,
     PlaybackEvent,
     PlaybackStatus,
+    PlayerExtendedStatus,
     PlayerInfo,
+    PlayerStatus,
+    PowerSource,
     Track,
     YotoPlayer,
 )
@@ -88,6 +93,16 @@ def _build_player() -> YotoPlayer:
         firmware_version="v2.17.5",
         mac="aa:bb:cc:dd:ee:ff",
     )
+    player.status = PlayerStatus(
+        battery_level_percentage=75,
+        card_insertion_state=CardInsertionState.PHYSICAL,
+        day_mode=DayMode.DAY,
+    )
+    player.extended_status = PlayerExtendedStatus(
+        power_source=PowerSource.USB_C,
+        network_ssid="HomeNet",
+        wifi_strength=-55,
+    )
     player.last_event = PlaybackEvent(
         player_id=PLAYER_ID,
         playback_status=PlaybackStatus.PLAYING,

tests/components/yoto/snapshots/test_sensor.ambr

@@ -0,0 +1,349 @@
+# serializer version: 1
+# name: test_all_entities[sensor.nursery_yoto_battery-entry]
+  EntityRegistryEntrySnapshot({
+    'aliases': list([
+      None,
+    ]),
+    'area_id': None,
+    'capabilities': dict({
+      'state_class': <SensorStateClass.MEASUREMENT: 'measurement'>,
+    }),
+    'config_entry_id': <ANY>,
+    'config_subentry_id': <ANY>,
+    'device_class': None,
+    'device_id': <ANY>,
+    'disabled_by': None,
+    'domain': 'sensor',
+    'entity_category': None,
+    'entity_id': 'sensor.nursery_yoto_battery',
+    'has_entity_name': True,
+    'hidden_by': None,
+    'icon': None,
+    'id': <ANY>,
+    'labels': set({
+    }),
+    'name': None,
+    'object_id_base': 'Battery',
+    'options': dict({
+    }),
+    'original_device_class': <SensorDeviceClass.BATTERY: 'battery'>,
+    'original_icon': None,
+    'original_name': 'Battery',
+    'platform': 'yoto',
+    'previous_unique_id': None,
+    'suggested_object_id': None,
+    'supported_features': 0,
+    'translation_key': None,
+    'unique_id': 'player-test_battery_level',
+    'unit_of_measurement': '%',
+  })
+# ---
+# name: test_all_entities[sensor.nursery_yoto_battery-state]
+  StateSnapshot({
+    'attributes': ReadOnlyDict({
+      'device_class': 'battery',
+      'friendly_name': 'Nursery Yoto Battery',
+      'state_class': <SensorStateClass.MEASUREMENT: 'measurement'>,
+      'unit_of_measurement': '%',
+    }),
+    'context': <ANY>,
+    'entity_id': 'sensor.nursery_yoto_battery',
+    'last_changed': <ANY>,
+    'last_reported': <ANY>,
+    'last_updated': <ANY>,
+    'state': '75',
+  })
+# ---
+# name: test_all_entities[sensor.nursery_yoto_card_slot-entry]
+  EntityRegistryEntrySnapshot({
+    'aliases': list([
+      None,
+    ]),
+    'area_id': None,
+    'capabilities': dict({
+      'options': list([
+        'none',
+        'physical',
+        'remote',
+        'streaming',
+      ]),
+    }),
+    'config_entry_id': <ANY>,
+    'config_subentry_id': <ANY>,
+    'device_class': None,
+    'device_id': <ANY>,
+    'disabled_by': None,
+    'domain': 'sensor',
+    'entity_category': None,
+    'entity_id': 'sensor.nursery_yoto_card_slot',
+    'has_entity_name': True,
+    'hidden_by': None,
+    'icon': None,
+    'id': <ANY>,
+    'labels': set({
+    }),
+    'name': None,
+    'object_id_base': 'Card slot',
+    'options': dict({
+    }),
+    'original_device_class': <SensorDeviceClass.ENUM: 'enum'>,
+    'original_icon': None,
+    'original_name': 'Card slot',
+    'platform': 'yoto',
+    'previous_unique_id': None,
+    'suggested_object_id': None,
+    'supported_features': 0,
+    'translation_key': 'card_insertion_state',
+    'unique_id': 'player-test_card_insertion_state',
+    'unit_of_measurement': None,
+  })
+# ---
+# name: test_all_entities[sensor.nursery_yoto_card_slot-state]
+  StateSnapshot({
+    'attributes': ReadOnlyDict({
+      'device_class': 'enum',
+      'friendly_name': 'Nursery Yoto Card slot',
+      'options': list([
+        'none',
+        'physical',
+        'remote',
+        'streaming',
+      ]),
+    }),
+    'context': <ANY>,
+    'entity_id': 'sensor.nursery_yoto_card_slot',
+    'last_changed': <ANY>,
+    'last_reported': <ANY>,
+    'last_updated': <ANY>,
+    'state': 'physical',
+  })
+# ---
+# name: test_all_entities[sensor.nursery_yoto_day_mode-entry]
+  EntityRegistryEntrySnapshot({
+    'aliases': list([
+      None,
+    ]),
+    'area_id': None,
+    'capabilities': dict({
+      'options': list([
+        'day',
+        'night',
+      ]),
+    }),
+    'config_entry_id': <ANY>,
+    'config_subentry_id': <ANY>,
+    'device_class': None,
+    'device_id': <ANY>,
+    'disabled_by': None,
+    'domain': 'sensor',
+    'entity_category': None,
+    'entity_id': 'sensor.nursery_yoto_day_mode',
+    'has_entity_name': True,
+    'hidden_by': None,
+    'icon': None,
+    'id': <ANY>,
+    'labels': set({
+    }),
+    'name': None,
+    'object_id_base': 'Day mode',
+    'options': dict({
+    }),
+    'original_device_class': <SensorDeviceClass.ENUM: 'enum'>,
+    'original_icon': None,
+    'original_name': 'Day mode',
+    'platform': 'yoto',
+    'previous_unique_id': None,
+    'suggested_object_id': None,
+    'supported_features': 0,
+    'translation_key': 'day_mode',
+    'unique_id': 'player-test_day_mode',
+    'unit_of_measurement': None,
+  })
+# ---
+# name: test_all_entities[sensor.nursery_yoto_day_mode-state]
+  StateSnapshot({
+    'attributes': ReadOnlyDict({
+      'device_class': 'enum',
+      'friendly_name': 'Nursery Yoto Day mode',
+      'options': list([
+        'day',
+        'night',
+      ]),
+    }),
+    'context': <ANY>,
+    'entity_id': 'sensor.nursery_yoto_day_mode',
+    'last_changed': <ANY>,
+    'last_reported': <ANY>,
+    'last_updated': <ANY>,
+    'state': 'day',
+  })
+# ---
+# name: test_all_entities[sensor.nursery_yoto_power_source-entry]
+  EntityRegistryEntrySnapshot({
+    'aliases': list([
+      None,
+    ]),
+    'area_id': None,
+    'capabilities': dict({
+      'options': list([
+        'battery',
+        'v2_dock',
+        'usb_c',
+        'qi_dock',
+      ]),
+    }),
+    'config_entry_id': <ANY>,
+    'config_subentry_id': <ANY>,
+    'device_class': None,
+    'device_id': <ANY>,
+    'disabled_by': None,
+    'domain': 'sensor',
+    'entity_category': <EntityCategory.DIAGNOSTIC: 'diagnostic'>,
+    'entity_id': 'sensor.nursery_yoto_power_source',
+    'has_entity_name': True,
+    'hidden_by': None,
+    'icon': None,
+    'id': <ANY>,
+    'labels': set({
+    }),
+    'name': None,
+    'object_id_base': 'Power source',
+    'options': dict({
+    }),
+    'original_device_class': <SensorDeviceClass.ENUM: 'enum'>,
+    'original_icon': None,
+    'original_name': 'Power source',
+    'platform': 'yoto',
+    'previous_unique_id': None,
+    'suggested_object_id': None,
+    'supported_features': 0,
+    'translation_key': 'power_source',
+    'unique_id': 'player-test_power_source',
+    'unit_of_measurement': None,
+  })
+# ---
+# name: test_all_entities[sensor.nursery_yoto_power_source-state]
+  StateSnapshot({
+    'attributes': ReadOnlyDict({
+      'device_class': 'enum',
+      'friendly_name': 'Nursery Yoto Power source',
+      'options': list([
+        'battery',
+        'v2_dock',
+        'usb_c',
+        'qi_dock',
+      ]),
+    }),
+    'context': <ANY>,
+    'entity_id': 'sensor.nursery_yoto_power_source',
+    'last_changed': <ANY>,
+    'last_reported': <ANY>,
+    'last_updated': <ANY>,
+    'state': 'usb_c',
+  })
+# ---
+# name: test_all_entities[sensor.nursery_yoto_ssid-entry]
+  EntityRegistryEntrySnapshot({
+    'aliases': list([
+      None,
+    ]),
+    'area_id': None,
+    'capabilities': None,
+    'config_entry_id': <ANY>,
+    'config_subentry_id': <ANY>,
+    'device_class': None,
+    'device_id': <ANY>,
+    'disabled_by': None,
+    'domain': 'sensor',
+    'entity_category': <EntityCategory.DIAGNOSTIC: 'diagnostic'>,
+    'entity_id': 'sensor.nursery_yoto_ssid',
+    'has_entity_name': True,
+    'hidden_by': None,
+    'icon': None,
+    'id': <ANY>,
+    'labels': set({
+    }),
+    'name': None,
+    'object_id_base': 'SSID',
+    'options': dict({
+    }),
+    'original_device_class': None,
+    'original_icon': None,
+    'original_name': 'SSID',
+    'platform': 'yoto',
+    'previous_unique_id': None,
+    'suggested_object_id': None,
+    'supported_features': 0,
+    'translation_key': 'ssid',
+    'unique_id': 'player-test_ssid',
+    'unit_of_measurement': None,
+  })
+# ---
+# name: test_all_entities[sensor.nursery_yoto_ssid-state]
+  StateSnapshot({
+    'attributes': ReadOnlyDict({
+      'friendly_name': 'Nursery Yoto SSID',
+    }),
+    'context': <ANY>,
+    'entity_id': 'sensor.nursery_yoto_ssid',
+    'last_changed': <ANY>,
+    'last_reported': <ANY>,
+    'last_updated': <ANY>,
+    'state': 'HomeNet',
+  })
+# ---
+# name: test_all_entities[sensor.nursery_yoto_wi_fi_rssi-entry]
+  EntityRegistryEntrySnapshot({
+    'aliases': list([
+      None,
+    ]),
+    'area_id': None,
+    'capabilities': dict({
+      'state_class': <SensorStateClass.MEASUREMENT: 'measurement'>,
+    }),
+    'config_entry_id': <ANY>,
+    'config_subentry_id': <ANY>,
+    'device_class': None,
+    'device_id': <ANY>,
+    'disabled_by': None,
+    'domain': 'sensor',
+    'entity_category': <EntityCategory.DIAGNOSTIC: 'diagnostic'>,
+    'entity_id': 'sensor.nursery_yoto_wi_fi_rssi',
+    'has_entity_name': True,
+    'hidden_by': None,
+    'icon': None,
+    'id': <ANY>,
+    'labels': set({
+    }),
+    'name': None,
+    'object_id_base': 'Wi-Fi RSSI',
+    'options': dict({
+    }),
+    'original_device_class': <SensorDeviceClass.SIGNAL_STRENGTH: 'signal_strength'>,
+    'original_icon': None,
+    'original_name': 'Wi-Fi RSSI',
+    'platform': 'yoto',
+    'previous_unique_id': None,
+    'suggested_object_id': None,
+    'supported_features': 0,
+    'translation_key': 'wifi_rssi',
+    'unique_id': 'player-test_wifi_rssi',
+    'unit_of_measurement': 'dBm',
+  })
+# ---
+# name: test_all_entities[sensor.nursery_yoto_wi_fi_rssi-state]
+  StateSnapshot({
+    'attributes': ReadOnlyDict({
+      'device_class': 'signal_strength',
+      'friendly_name': 'Nursery Yoto Wi-Fi RSSI',
+      'state_class': <SensorStateClass.MEASUREMENT: 'measurement'>,
+      'unit_of_measurement': 'dBm',
+    }),
+    'context': <ANY>,
+    'entity_id': 'sensor.nursery_yoto_wi_fi_rssi',
+    'last_changed': <ANY>,
+    'last_reported': <ANY>,
+    'last_updated': <ANY>,
+    'state': '-55',
+  })
+# ---

tests/components/yoto/test_media_player.py

@@ -1,7 +1,7 @@
 """Tests for the Yoto media player platform."""
 
 from typing import Any
-from unittest.mock import MagicMock
+from unittest.mock import MagicMock, patch
 
 from freezegun.api import FrozenDateTimeFactory
 import pytest
@@ -22,7 +22,7 @@ from homeassistant.components.media_player import (
     SERVICE_VOLUME_SET,
     MediaPlayerState,
 )
-from homeassistant.const import ATTR_ENTITY_ID, STATE_UNAVAILABLE
+from homeassistant.const import ATTR_ENTITY_ID, STATE_UNAVAILABLE, Platform
 from homeassistant.core import HomeAssistant
 from homeassistant.exceptions import HomeAssistantError, ServiceValidationError
 from homeassistant.helpers import entity_registry as er
@@ -68,7 +68,8 @@ async def test_entity_state(
 ) -> None:
     """Snapshot the media player entity state."""
     freezer.move_to("2026-05-08T12:00:00+00:00")
-    await setup_integration(hass, mock_config_entry)
+    with patch("homeassistant.components.yoto.PLATFORMS", [Platform.MEDIA_PLAYER]):
+        await setup_integration(hass, mock_config_entry)
     await snapshot_platform(hass, entity_registry, snapshot, mock_config_entry.entry_id)
 
 

tests/components/yoto/test_sensor.py

@@ -0,0 +1,49 @@
+"""Tests for the Yoto sensor platform."""
+
+from unittest.mock import MagicMock, patch
+
+import pytest
+from syrupy.assertion import SnapshotAssertion
+
+from homeassistant.const import STATE_UNAVAILABLE, Platform
+from homeassistant.core import HomeAssistant
+from homeassistant.helpers import entity_registry as er
+
+from . import setup_integration
+
+from tests.common import MockConfigEntry, snapshot_platform
+
+pytestmark = pytest.mark.usefixtures("setup_credentials")
+
+ENTITY_ID = "sensor.nursery_yoto_battery"
+
+
+@pytest.mark.usefixtures("mock_yoto_client", "entity_registry_enabled_by_default")
+async def test_all_entities(
+    hass: HomeAssistant,
+    mock_config_entry: MockConfigEntry,
+    entity_registry: er.EntityRegistry,
+    snapshot: SnapshotAssertion,
+) -> None:
+    """Snapshot every Yoto sensor entity."""
+    with patch("homeassistant.components.yoto.PLATFORMS", [Platform.SENSOR]):
+        await setup_integration(hass, mock_config_entry)
+
+    await snapshot_platform(hass, entity_registry, snapshot, mock_config_entry.entry_id)
+
+
+async def test_sensor_unavailable_when_offline(
+    hass: HomeAssistant,
+    mock_yoto_client: MagicMock,
+    mock_config_entry: MockConfigEntry,
+) -> None:
+    """Sensors are unavailable while the player is offline."""
+    player = next(iter(mock_yoto_client.players.values()))
+    player.is_online = False
+
+    with patch("homeassistant.components.yoto.PLATFORMS", [Platform.SENSOR]):
+        await setup_integration(hass, mock_config_entry)
+
+    state = hass.states.get(ENTITY_ID)
+    assert state is not None
+    assert state.state == STATE_UNAVAILABLE