From f00decfaa33b65d38052d06ef9cec0276e4f2c84 Mon Sep 17 00:00:00 2001
From: Duco Sebel <74970928+DCSBL@users.noreply.github.com>
Date: Fri, 22 May 2026 15:23:09 +0200
Subject: [PATCH] Use uptime device class for HomeWizard uptime sensor
 (#171830)

---
 homeassistant/components/homewizard/sensor.py        | 12 ++----------
 .../components/homewizard/snapshots/test_sensor.ambr |  4 ++--
 2 files changed, 4 insertions(+), 12 deletions(-)

diff --git a/homeassistant/components/homewizard/sensor.py b/homeassistant/components/homewizard/sensor.py
index c6718ba47e9..3574bc1cdc8 100644
--- a/homeassistant/components/homewizard/sensor.py
+++ b/homeassistant/components/homewizard/sensor.py
@@ -35,7 +35,6 @@ from homeassistant.helpers.device_registry import DeviceInfo
 from homeassistant.helpers.entity_platform import AddConfigEntryEntitiesCallback
 from homeassistant.helpers.typing import StateType
 from homeassistant.util.dt import utcnow
-from homeassistant.util.variance import ignore_variance
 
 from .const import DOMAIN
 from .coordinator import HomeWizardConfigEntry, HWEnergyDeviceUpdateCoordinator
@@ -66,13 +65,6 @@ def to_percentage(value: float | None) -> float | None:
     return value * 100 if value is not None else None
 
 
-def uptime_to_datetime(value: int) -> datetime:
-    """Convert seconds to datetime timestamp."""
-    return utcnow().replace(microsecond=0) - timedelta(seconds=value)
-
-
-uptime_to_stable_datetime = ignore_variance(uptime_to_datetime, timedelta(minutes=5))
-
 SENSORS: Final[tuple[HomeWizardSensorEntityDescription, ...]] = (
     HomeWizardSensorEntityDescription(
         key="smr_version",
@@ -643,7 +635,7 @@ SENSORS: Final[tuple[HomeWizardSensorEntityDescription, ...]] = (
     HomeWizardSensorEntityDescription(
         key="uptime",
         translation_key="uptime",
-        device_class=SensorDeviceClass.TIMESTAMP,
+        device_class=SensorDeviceClass.UPTIME,
         entity_category=EntityCategory.DIAGNOSTIC,
         entity_registry_enabled_default=False,
         has_fn=(
@@ -651,7 +643,7 @@ SENSORS: Final[tuple[HomeWizardSensorEntityDescription, ...]] = (
         ),
         value_fn=(
             lambda data: (
-                uptime_to_stable_datetime(data.system.uptime_s)
+                utcnow() - timedelta(seconds=data.system.uptime_s)
                 if data.system is not None and data.system.uptime_s is not None
                 else None
             )
diff --git a/tests/components/homewizard/snapshots/test_sensor.ambr b/tests/components/homewizard/snapshots/test_sensor.ambr
index 3278623cd45..57fdb92f4a9 100644
--- a/tests/components/homewizard/snapshots/test_sensor.ambr
+++ b/tests/components/homewizard/snapshots/test_sensor.ambr
@@ -798,7 +798,7 @@
     'object_id_base': 'Uptime',
     'options': dict({
     }),
-    'original_device_class': <SensorDeviceClass.TIMESTAMP: 'timestamp'>,
+    'original_device_class': <SensorDeviceClass.UPTIME: 'uptime'>,
     'original_icon': None,
     'original_name': 'Uptime',
     'platform': 'homewizard',
@@ -813,7 +813,7 @@
 # name: test_sensors[HWE-BAT-entity_ids10][sensor.device_uptime:state]
   StateSnapshot({
     'attributes': ReadOnlyDict({
-      'device_class': 'timestamp',
+      'device_class': 'uptime',
       'friendly_name': 'Device Uptime',
     }),
     'context': <ANY>,