How to get history data for other sensors?

HarvsG · September 11, 2022, 2:15pm

The integration I am working on - Bayesian - calculates its state from that of other sensors. If I end up developing a config flow for this integration it will be very helpful to calculate some values from the history of other sensors.

Is there an in-built function in home assistant like get_entity_history("entity_id", "start_time, "stop_time") that returns the history of a specified entity over a specified time period.

Looks as if some of these functions may help from homeassistant/components/history but not sure how I would call them from another integration/config flow.

github.com

home-assistant/core/blob/7937bfeedb51b6c4b6d66e5b171e861cd5373f5f/homeassistant/components/recorder/history.py#L368-L405

    
      
          def state_changes_during_period(
              hass: HomeAssistant,
              start_time: datetime,
              end_time: datetime | None = None,
              entity_id: str | None = None,
              no_attributes: bool = False,
              descending: bool = False,
              limit: int | None = None,
              include_start_time_state: bool = True,
          ) -> MutableMapping[str, list[State]]:
              """Return states changes during UTC period start_time - end_time."""
              entity_id = entity_id.lower() if entity_id is not None else None
              entity_ids = [entity_id] if entity_id is not None else None
          
          
    with session_scope(hass=hass) as session:
                  stmt = _state_changed_during_period_stmt(
                      _schema_version(hass),
                      start_time,
                      end_time,
                      entity_id,

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Also looks positive.

As does (but looks like it need wrapping in a scope:

github.com

home-assistant/core/blob/8ed689fedee0a3b923b1689b98f2b0c8101d01e8/homeassistant/components/recorder/history.py#L255-L279

    
      
          def get_significant_states_with_session(
              hass: HomeAssistant,
              session: Session,
              start_time: datetime,
              end_time: datetime | None = None,
              entity_ids: list[str] | None = None,
              filters: Filters | None = None,
              include_start_time_state: bool = True,
              significant_changes_only: bool = True,
              minimal_response: bool = False,
              no_attributes: bool = False,
              compressed_state_format: bool = False,
          ) -> MutableMapping[str, list[State | dict[str, Any]]]:
              """
              Return states changes during UTC period start_time - end_time.
          
          
    entity_ids is an optional iterable of entities to include in the results.
          
          
    filters is an optional SQLAlchemy filter which will be applied to the database
              queries unless entity_ids is given, in which case its ignored.

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github.com

home-assistant/core/blob/8ed689fedee0a3b923b1689b98f2b0c8101d01e8/homeassistant/components/recorder/history.py#L168-L172

    
      
          """Wrap get_significant_states_with_session with an sql session."""
          with session_scope(hass=hass) as session:
              return get_significant_states_with_session(
                  hass,
                  session,

msp1974 · September 17, 2022, 11:23am

Just import state_changes_during_period from homeassistant.components.
.recorder.history in your config_flow.py and when calling the function pass your hass variable from your integration (with other required params).

HarvsG · October 23, 2023, 11:40am

Is the hass variable available inside a config flow?

Edit: looks like it is: https://github.com/home-assistant/core/blob/8a7de27946f3ca62f999cda69fc42744640fd3b8/homeassistant/components/switchbot/config_flow.py#L172