History

The history integration will track everything that is going on within Home Assistant and allows the user to browse through it. It depends on the recorder component for storing the data and uses the same database setting. If any entities are excluded from being recorded, no history will be available for these entities.

This integration is by default enabled, unless you’ve disabled or removed the default_config: line from your configuration. If that is the case, the following example shows you how to enable this integration manually:

# Basic configuration.yaml entry
history:

Without any include or exclude configuration the history displays graphs for every entity (well that’s not exactly true - for instance hidden entities or scenes are never shown) on a given date. If you are only interested in some of the entities you have several options:

Define domains and entities to exclude (aka. blacklist). This is convenient when you are basically happy with the information displayed, but just want to remove some entities or domains. Usually these are entities/domains which do not change or rarely change (like updater or automation).

# Example configuration.yaml entry with exclude
history:
  exclude:
    domains:
      - automation
      - updater
    entities:
      - sensor.last_boot
      - sensor.date

Define domains and entities to display by using the include configuration (aka. whitelist). If you have a lot of entities in your system and your exclude list is getting too large, it might be better just to define the entities or domains to include.

# Example configuration.yaml entry with include
history:
  include:
    domains:
      - sensor
      - switch
      - media_player

Use the include list to define the domains/entities to display, and exclude some of them within the exclude list. This makes sense if you, for instance, include the sensor domain, but want to exclude some specific sensors. Instead of adding every sensor entity to the include entities list just include the sensor domain and exclude the sensor entities you are not interested in. Note that the order of any include entities will be displayed as listed in the configuration, otherwise, the display order is arbitrary.

# Example configuration.yaml entry with include and exclude
history:
  include:
    domains:
      - sensor
      - switch
      - media_player
  exclude:
    entities:
     - sensor.last_boot
     - sensor.date

If you’d like the order of display of the sensors to follow the way they are listed in the included entity list, you can set the flag use_include_order to true.

# Example configuration.yaml entry using specified entity display order
history:
  use_include_order: true
  include:
    entities:
      - sun.sun
      - light.front_porch

Implementation details

The history is stored in a SQLite database open-peer-power_v2.db within your configuration directory unless the recorder integration is set up differently.

• events table is all events except time_changed that happened while recorder integration was running.
• states table contains all the new_state values of state_changed events.
• Inside the states table you have:
  • entity_id: the entity_id of the entity
  • state: the state of the entity
  • attributes: JSON of the state attributes
  • last_changed: timestamp last time the state has changed. A state_changed event can happen when just attributes change.
  • last_updated: timestamp anything has changed (state, attributes)
  • created: timestamp this entry was inserted into the database

When the history integration queries the states table it only selects states where the state has changed: WHERE last_changed=last_updated

On dates

SQLite databases do not support native dates. That’s why all the dates are saved in seconds since the UNIX epoch. Convert them manually using this site or in Python:

from datetime import datetime

datetime.fromtimestamp(1422830502)