New area device class
More details can be found in the Number documentation and Sensor documentation
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2024
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Moving to Pydantic v2
Pydantic is a widely used library in Python for data validation. On June 30, 2023, Pydantic v2 was released, introducing significant changes that are not backward compatible with Pydantic v1.
1 min readUse Kelvin as the preferred color temperature unit
In October 2022, Home Assistant migrated the preferred color temperature unit from mired to kelvin.
2 min readChanged name of WaterHeaterEntityDescription
A naming error of the entity description was found in the Water Heater integration, and we have now renamed WaterHeaterEntityEntityDescription to WaterHeaterEntityDescription in the 2025.1 release.
1 min readNew vacuum state property
As of Home Assistant Core 2025.1, the constants used to return state in StateVacuumEntity are deprecated and replaced by the VacuumActivity enum.
1 min readClimate entity now supports independent horizontal swing
As of Home Assistant Core 2024.12, we have implemented an independent property and method for controlling horizontal swing in ClimateEntity.
1 min readUtility function homeassistant.util.dt.utc_to_timestamp is deprecated
The utility function homeassistant.util.dt.utc_to_timestamp is deprecated and will be removed in Home Assistant Core 2026.1, custom integrations which call it should instead call the stdlib method datetime.datetime.timestamp()
1 min readCamera API changes
With Home Assistant 2024.11 we added WebRTC for most cameras. To add support for it we needed to refactor and improve the camera entity.
1 min readTranslating units of measurement
Home Assistant 2024.12 will support the translation of custom units of measurement.
1 min readIntegration quality scale
Since the original quality scale was introduced in 2020, Home Assistant changed quite a lot.
2 min readNew options flow properties
New code: `python @staticmethod @callback def async_get_options_flow( config_entry:
2 min readSizing support for custom cards in sections view
With Home Assistant 2024.11, "sections" view is now the default view when building a dashboard.
1 min readReauth and reconfigure flows need to be linked to a config entry
Starting a reauth or a reconfigure flow without a link to the config entry has been deprecated, and will start failing in 2025.12.
1 min readThe core config class has been moved
The definition of the core config class, an instance of which is available as hass.config has been moved from homeassistant/core.py to homeassistant/core_config.py.
1 min readChanges to the update entity
The update entity has been adjusted:
1 min readNew alarm control panel state property and state enum
As of Home Assistant Core 2024.11, we have introduced the alarm_state property in the AlarmControlPanelEntity.
1 min readNew helpers and best practises for reauth and reconfigure flows
New helper methods have been added to the ConfigFlow to facilitate management of reauth and reconfigure flows:
1 min readExtend deprecation period of hass.helpers
On March 30, 2024, we announced the deprecation of the hass.helpers attribute for the Home Assistant 2024.11 release.
1 min readDeprecating state constants for cover
As of Home Assistant Core 2024.11, the constants used to return state in CoverEntity are deprecated and replaced by the CoverState enum.
1 min readChanges to the UnitOfConductivity enum
The UnitOfConductivity enum has been changed from:
1 min readIntroducing the Assist satellite entity
Users typically interact with Assist using remote voice satellites, such as the ESP32-S3-BOX-3 running ESPHome, analog phones running VoIP, and more.
1 min readVersion compare for Update platform can now be overwritten
With the merge of core PR #124797, which will land in Home Assistant Core 2024.10, there is a new method in the update platform: version_is_newer().
1 min readAdditional validation in Climate set temperature
As of Home Assistant Core 2024.10, we have added further validation of the parameters passed to the set_temperature method.
1 min readEnforce SourceType and add shorthand attributes and EntityDescription to device_tracker
The source_type property of device_tracker entities is now always expected to be a SourceType enum value.
1 min readDeprecating constants for Media Player
As of Home Assistant Core 2022.5, the feature flag constants used in MediaPlayerEntity were deprecated and replaced by the MediaPlayerEntityFeature enum.
1 min readDeprecating feature flag constants for Vacuum
As of Home Assistant Core 2022.5, the feature flag constants used in StateVacuumEntity were deprecated and replaced by the VacuumEntityFeature enum.
1 min readDeprecating state constants for camera
As of Home Assistant Core 2024.10, the constants used to return state in Camera are deprecated and replaced by the CameraState enum.
1 min readDeprecating state constants for lock
As of Home Assistant Core 2024.10, the constants used to return state in LockEntity are deprecated and replaced by the LockState enum.
1 min readExtend deprecation period of @bind_hass and hass.components
On February 27, 2024, we announced the deprecation of the @bind_hass decorator and the hass.components attribute for the Home Assistant 2024.9 release.
1 min readCalories added to energy class sensors
Starting from Home Assistant 2024.10 calories have been added to the units of measurement in the energy sensor class.
1 min readTemplate.hass is no longer automatically set when rendering templates
With the merge of core PR #89242, which landed in Home Assistant Core 2023.4, Template.hass will be set on Template objects created during schema validation.
1 min readChanges to the icon translations schema
The icon translations schema has been adjusted to allow assigning icons for sections in services.
1 min readValidation of entity action schemas
Registering entity service actions allows integration authors to pass in:
1 min readNew returning type in LawnMowerActivity
As of Home Assistant Core 2024.9, integrations implementing LawnMowerEntity can indicate that their mower is returning to the dock by using the new LawnMowerActivity.RETURNING state.
1 min readSet up your DataUpdateCoordinator with a setup method
In Home Assistant 2024.8, we are introducing the _async_setup method for the data update coordinator.
1 min readClimate entity now validates temperature provided in action calls
As of Home Assistant Core 2024.8, we have implemented validation for the temperature action call provided by the ClimateEntity.
1 min readNew entity feature flags in FanEntity
As of Home Assistant Core 2024.8, we have added two new flags to FanEntityFeature:
1 min readmodel_id added to DeviceInfo
Starting from 2024.8, you can now add a model identifier to the DeviceInfo class.
1 min readServices are now actions
The term "Services" has been a source of confusion for many users, as it is not immediately clear what it refers to; it could be a web or STT service, but in the context of Home Assistant, it means something entirely different (service calls).
1 min readNew HVACAction DEFROSTING
The ClimateEntity has an hvac_action property, which describes what the climate entity is currently doing (which is not the same as its mode).
1 min readExcluding all state attributes from recording using MATCH_ALL
The way how state attributes are excluded from the recording was previously changed in September 2023.
1 min readMaking http path registration async safe with
async_register_static_pathshass.http.register_static_path is deprecated because it does blocking I/O in the event loop, instead call await hass.http.async_register_static_paths([StaticPathConfig(url_path, path, cache_headers)])
1 min readForwarding setup to config entry platforms
Calling hass.config_entries.async_forward_entry_setup is deprecated and will be removed in Home Assistant 2025.6.
1 min readAlarm Control Panel Entity code validation
The AlarmControlPanelEntity is now enforcing validation of code for alarm control panel entities, which set code_arm_required to True (default behavior).
1 min readExposing Home Assistant API to LLMs
Since we introduced LLMs in Home Assistant as part of Year of the Voice, we have received the request to allow enabling LLMs to interact with Home Assistant.
1 min readHandling time zones without blocking the event loop
Constructing ZoneInfo objects may do blocking I/O to load the zone info from disk if the timezone passed is not in the cache.
1 min readChanges in setup entity platforms with group integration
By default, the group integration allows entities to be grouped. If the default ON/OFF states for an entity default to on and off, then grouping is supported by default.
2 min readLockEntity supports open/opening state
Recently we have added an open and opening state to LockEntity
1 min readHow we managed to speed up our CI to save 168+ days of execution time per month
We got a taste for speed after UV gave us back 215 compute hours a month. Our CI workflow gets triggered on each commit, and due to the high volume of contributions, it was triggered 6647 times in March 2024.
2 min readSecond phase of notify entity platform implementation
Recently we added the notify entity platform. The new notify platform method implements service send_message.
1 min readImproved typing for hass.data
In the past, one of the challenges with hass.data was to correctly assign type information.
1 min readStore runtime data inside the config entry
Integrations often need to set up and track custom data, such as coordinators, API connections, or code objects.
1 min readAlways reload after a successful re-auth flow
To update and reload the entry after a successful reauthentication flow, the helper async_update_reload_and_abort can be used.
1 min readReplacing
async_track_state_changewithasync_track_state_change_eventasync_track_state_change is deprecated and will be removed in Home Assistant 2025.5. async_track_state_change_event should be used instead.
1 min readNew notify entity platform
The notify platform is now available as an entity platform. The MVP for the new notify platform implements the method and service send_message.
1 min readDeprecate old backports and typing alias
In the past, we've backported features from upstream CPython to use them early and improve user and developers' experience.
1 min readDeprecating
async_add_hass_jobAs part of an effort to improve performance and simplify the core job API, async_add_hass_job is deprecated and will be removed from Home Assistant in 2025.5.
1 min readHow uv saves Home Assistant 215 compute hours per month
By replacing pip with uv in our production images, our build pipeline (and therefore releasing a new version) is a lot faster.
1 min readDeprecate hass.helpers usage
As of Home Assistant 2024.5, we deprecate the use of hass.helpers. Using hass.helpers will issue a warning in the logs.
1 min readConfig Entries can now provide a reconfigure step
As of Home Assistant Core 2024.4, config entries can now be reconfigured by adding a reconfigure step in their config flows.
1 min readNew state timestamp State.last_reported
The State object is now always updated and an event is always fired when an integration sets the state of an entity, regardless of any change to the state or a state attribute.
1 min readRaising exceptions with translations
Translation support applies to HomeAssistantError and subclasses like ServiceValidationError.
1 min readDeprecating
async_run_jobandasync_add_jobasync_run_job and async_add_job are deprecated and will be removed in Home Assistant 2025.4.
1 min readClimate entity auxiliary heater is deprecated
As of Home Assistant Core 2024.4 we have deprecated the auxiliary heater functionality in ClimateEntity.
1 min readIntegrations import in the executor to avoid blocking the event loop
Starting from Home Assistant 2024.4, all integrations are imported in the executor to avoid blocking the event loop while the code is imported and executed.
1 min readSupport for platform translations in separate files will be removed
The method for integrations to provide translations for states of its entities under other integrations, for example to translate an integration's sensors was changed in November 2022, and support for the old method will be removed in Home Assistant Core 2024.5.0.
1 min readIntroducing device name translations
It's now possible to provide translations for device names, including support for static values to be used as placeholders.
1 min readDeprecate use of @bind_hass and hass.components
As of Home Assistant 2024.3, we deprecate the use of the @bind_hass decorator and thus also the use of hass.components.
1 min readNew single instance only manifest option
In Home Assistant 2024.3, we introduced a new single_config_entry option for the integration manifest file.
1 min readNew Climate entity toggle method
As of Home Assistant Core 2024.3 we have added a new toggle method to ClimateEntity and users can now call climate.toggle in their service calls.
1 min readAltering config entries
Starting from Home Assistant 2024.3, modifications to a ConfigEntry should use hass.config_entries.async_update_entry.
1 min readIt is now required for lights to set color mode
Light entities are now required to set the supported_color_modes and color_mode properties, and a warning will be logged asking users to report an issue if that's not done.
1 min readProperties changes for ha-state-icon
In Home Assistant 2024.2, integrations have a new way to provide icons. To support this new feature, ha-state-icon component properties have changed.
1 min readNew entity features in Climate entity
As of Home Assistant Core 2024.2 we have added two new flags into ClimateEntityFeature:
1 min readChanges to light color mode when lights display an effect
The primary reason for introducing light color modes was that a light's state should not be ambiguous.
1 min readEnumerating services
In Home Assistant 2024.2, we will introduce hass.services.async_services_for_domain(), which is a new way to enumerate services by domain, allowing integrations to inspect which services are available without having to obtain all the services on the system.
1 min readIntroducing entity translation placeholders
It's now possible to provide static values to be used in an entity translation using placeholders.
1 min readIcon translations
In Home Assistant 2024.2, we will introduce a new way to provide icons for integrations:
1 min readDeprecate invalid use of sensor unit of measurement and state class
Since Home Assistant Core 2022.12, a warning is issued in the logs if a sensor entity that has a device class uses unit of measurement and state class incorrectly, taking their device class into account.
1 min readChanges to FlowManager.async_show_progress
FlowHandler.async_show_progress has been updated:
1 min read