Deprecate MQTT vacuum battery feature and remove it as default feature

homeassistant/components/mqtt/strings.json

@@ -1,5 +1,9 @@
 {
   "issues": {
+    "deprecated_vacuum_battery_feature": {
+      "title": "Deprecated battery feature used",
+      "description": "Vacuum entity {entity_id} implements the battery feature which is deprecated. This will stop working in Home Assistant 2026.3. Implement a separate entity for the battery status instead. To fix the issue `battery` feature should be removed from the configured supported features, and Home Assistant should be restarted to fix this issue."
+    },
     "invalid_platform_config": {
       "title": "Invalid config found for MQTT {domain} item",
       "description": "Home Assistant detected an invalid config for a manually configured item.\n\nPlatform domain: **{domain}**\nConfiguration file: **{config_file}**\nNear line: **{line}**\nConfiguration found:\n```yaml\n{config}\n```\nError: **{error}**.\n\nMake sure the configuration is valid and [reload](/developer-tools/yaml) the manually configured MQTT items or restart Home Assistant to fix this issue."

homeassistant/components/mqtt/vacuum.py

@@ -17,7 +17,7 @@ from homeassistant.components.vacuum import (
 from homeassistant.config_entries import ConfigEntry
 from homeassistant.const import ATTR_SUPPORTED_FEATURES, CONF_NAME
 from homeassistant.core import HomeAssistant, callback
-from homeassistant.helpers import config_validation as cv
+from homeassistant.helpers import config_validation as cv, issue_registry as ir
 from homeassistant.helpers.entity_platform import AddConfigEntryEntitiesCallback
 from homeassistant.helpers.json import json_dumps
 from homeassistant.helpers.typing import ConfigType, DiscoveryInfoType, VolSchemaType
@@ -25,11 +25,11 @@ from homeassistant.util.json import json_loads_object
 
 from . import subscription
 from .config import MQTT_BASE_SCHEMA
-from .const import CONF_COMMAND_TOPIC, CONF_RETAIN, CONF_STATE_TOPIC
-from .entity import MqttEntity, async_setup_entity_entry_helper
+from .const import CONF_COMMAND_TOPIC, CONF_RETAIN, CONF_STATE_TOPIC, DOMAIN
+from .entity import IssueSeverity, MqttEntity, async_setup_entity_entry_helper
 from .models import ReceiveMessage
 from .schemas import MQTT_ENTITY_COMMON_SCHEMA
-from .util import valid_publish_topic
+from .util import learn_more_url, valid_publish_topic
 
 PARALLEL_UPDATES = 0
 
@@ -84,6 +84,8 @@ SERVICE_TO_STRING: dict[VacuumEntityFeature, str] = {
     VacuumEntityFeature.STOP: "stop",
     VacuumEntityFeature.RETURN_HOME: "return_home",
     VacuumEntityFeature.FAN_SPEED: "fan_speed",
+    # Use of the battery feature was deprecated in HA Core 2025.9
+    # and will removed with HA Core 2026.3
     VacuumEntityFeature.BATTERY: "battery",
     VacuumEntityFeature.STATUS: "status",
     VacuumEntityFeature.SEND_COMMAND: "send_command",
@@ -96,7 +98,6 @@ DEFAULT_SERVICES = (
     VacuumEntityFeature.START
     | VacuumEntityFeature.STOP
     | VacuumEntityFeature.RETURN_HOME
-    | VacuumEntityFeature.BATTERY
     | VacuumEntityFeature.CLEAN_SPOT
 )
 ALL_SERVICES = (
@@ -106,6 +107,7 @@ ALL_SERVICES = (
     | VacuumEntityFeature.FAN_SPEED
     | VacuumEntityFeature.SEND_COMMAND
 )
+DEPRECATED_SERVICES = VacuumEntityFeature.BATTERY
 
 
 def services_to_strings(
@@ -251,10 +253,35 @@ class MqttStateVacuum(MqttEntity, StateVacuumEntity):
             )
         }
 
+    async def mqtt_async_added_to_hass(self) -> None:
+        """Check for use of deprecated battery features."""
+        if self.supported_features & VacuumEntityFeature.BATTERY:
+            ir.async_create_issue(
+                self.hass,
+                DOMAIN,
+                f"deprecated_vacuum_battery_feature_{self.entity_id}",
+                issue_domain=vacuum.DOMAIN,
+                breaks_in_ha_version="2026.3",
+                is_fixable=False,
+                severity=IssueSeverity.WARNING,
+                learn_more_url=learn_more_url(vacuum.DOMAIN),
+                translation_placeholders={"entity_id": self.entity_id},
+                translation_key="deprecated_vacuum_battery_feature",
+            )
+            _LOGGER.warning(
+                "MQTT vacuum entity %s implements the battery feature "
+                "which is deprecated. This will stop working "
+                "in Home Assistant 2026.3. Implement a separate entity "
+                "for the battery status instead",
+                self.entity_id,
+            )
+
     def _update_state_attributes(self, payload: dict[str, Any]) -> None:
         """Update the entity state attributes."""
         self._state_attrs.update(payload)
         self._attr_fan_speed = self._state_attrs.get(FAN_SPEED, 0)
+        # Use of the battery feature was deprecated in HA Core 2025.9
+        # and will removed with HA Core 2026.3
         self._attr_battery_level = max(0, min(100, self._state_attrs.get(BATTERY, 0)))
 
     @callback

tests/components/mqtt/test_vacuum.py

@@ -32,6 +32,7 @@ from homeassistant.components.vacuum import (
 from homeassistant.const import CONF_NAME, ENTITY_MATCH_ALL, STATE_UNKNOWN
 from homeassistant.core import HomeAssistant
 from homeassistant.exceptions import HomeAssistantError
+from homeassistant.helpers import issue_registry as ir
 
 from .common import (
     help_custom_config,
@@ -63,7 +64,7 @@ from .common import (
     help_test_update_with_json_attrs_not_dict,
 )
 
-from tests.common import async_fire_mqtt_message
+from tests.common import async_capture_events, async_fire_mqtt_message
 from tests.components.vacuum import common
 from tests.typing import MqttMockHAClientGenerator, MqttMockPahoClient
 
@@ -108,7 +109,7 @@ async def test_default_supported_features(
     entity = hass.states.get("vacuum.mqtttest")
     entity_features = entity.attributes.get(mqttvacuum.CONF_SUPPORTED_FEATURES, 0)
     assert sorted(services_to_strings(entity_features, SERVICE_TO_STRING)) == sorted(
-        ["start", "stop", "return_home", "battery", "clean_spot"]
+        ["start", "stop", "return_home", "clean_spot"]
     )
 
 
@@ -313,8 +314,6 @@ async def test_status(
     async_fire_mqtt_message(hass, "vacuum/state", message)
     state = hass.states.get("vacuum.mqtttest")
     assert state.state == VacuumActivity.CLEANING
-    assert state.attributes.get(ATTR_BATTERY_LEVEL) == 54
-    assert state.attributes.get(ATTR_BATTERY_ICON) == "mdi:battery-50"
     assert state.attributes.get(ATTR_FAN_SPEED) == "max"
 
     message = """{
@@ -326,8 +325,6 @@ async def test_status(
     async_fire_mqtt_message(hass, "vacuum/state", message)
     state = hass.states.get("vacuum.mqtttest")
     assert state.state == VacuumActivity.DOCKED
-    assert state.attributes.get(ATTR_BATTERY_ICON) == "mdi:battery-charging-60"
-    assert state.attributes.get(ATTR_BATTERY_LEVEL) == 61
     assert state.attributes.get(ATTR_FAN_SPEED) == "min"
     assert state.attributes.get(ATTR_FAN_SPEED_LIST) == ["min", "medium", "high", "max"]
 
@@ -337,6 +334,61 @@ async def test_status(
     assert state.state == STATE_UNKNOWN
 
 
+# Use of the battery feature was deprecated in HA Core 2025.9
+# and will removed with HA Core 2026.3
+@pytest.mark.parametrize(
+    "hass_config",
+    [
+        help_custom_config(
+            vacuum.DOMAIN,
+            DEFAULT_CONFIG,
+            ({mqttvacuum.CONF_SUPPORTED_FEATURES: ["battery"]},),
+        )
+    ],
+)
+async def test_status_with_deprecated_battery_feature(
+    hass: HomeAssistant,
+    mqtt_mock_entry: MqttMockHAClientGenerator,
+    caplog: pytest.LogCaptureFixture,
+) -> None:
+    """Test status updates from the vacuum with deprecated battery feature."""
+    events = async_capture_events(hass, ir.EVENT_REPAIRS_ISSUE_REGISTRY_UPDATED)
+    await mqtt_mock_entry()
+    state = hass.states.get("vacuum.mqtttest")
+    assert state.state == STATE_UNKNOWN
+
+    message = """{
+        "battery_level": 54,
+        "state": "cleaning"
+    }"""
+    async_fire_mqtt_message(hass, "vacuum/state", message)
+    state = hass.states.get("vacuum.mqtttest")
+    assert state.state == VacuumActivity.CLEANING
+    assert state.attributes.get(ATTR_BATTERY_LEVEL) == 54
+    assert state.attributes.get(ATTR_BATTERY_ICON) == "mdi:battery-50"
+
+    message = """{
+        "battery_level": 61,
+        "state": "docked"
+    }"""
+
+    async_fire_mqtt_message(hass, "vacuum/state", message)
+    state = hass.states.get("vacuum.mqtttest")
+    assert state.state == VacuumActivity.DOCKED
+    assert state.attributes.get(ATTR_BATTERY_ICON) == "mdi:battery-charging-60"
+    assert state.attributes.get(ATTR_BATTERY_LEVEL) == 61
+
+    message = '{"state":null}'
+    async_fire_mqtt_message(hass, "vacuum/state", message)
+    state = hass.states.get("vacuum.mqtttest")
+    assert state.state == STATE_UNKNOWN
+    assert (
+        "MQTT vacuum entity vacuum.mqtttest implements "
+        "the battery feature which is deprecated." in caplog.text
+    )
+    assert len(events) == 1
+
+
 @pytest.mark.parametrize(
     "hass_config",
     [
@@ -346,7 +398,9 @@ async def test_status(
             (
                 {
                     mqttvacuum.CONF_SUPPORTED_FEATURES: services_to_strings(
-                        mqttvacuum.DEFAULT_SERVICES, SERVICE_TO_STRING
+                        mqttvacuum.DEFAULT_SERVICES
+                        | vacuum.VacuumEntityFeature.BATTERY,
+                        SERVICE_TO_STRING,
                     )
                 },
             ),