The meta-component Default Config

4 minute read

Reviewing and cleaning the configuration.yaml file that we have had to edit on other occasions. I’ve noticed the default_config component. A component that comes by default activated and so far had not paid much attention.

The Default Config component is a meta-component, which means that when you use it, it configures many other Home Assistant components by default. Removing it causes these components to stop working and those we want to use, we have to specify them one by one. Why would we want to do this? To improve the performance of our server by removing components and functionality that we are not using.

Let’s analyze the components included in default_config and include them in our configuration.yaml file as needed.

  • automation: Enables the Automations. In most cases, this integration is replaced by the line automation: !include automations.yaml, which will group all the automations in the automations.yaml file. If we are not going to use automations in Home Assistant, all this code can be deleted.
  • cloud: Enables Home Assistant Cloud that allows remote access to Home Assistant, cloud configuration storage, or integration of services such as Amazon Alexa or Google Assistant paying a subscription.
  • config: Enables the section Configuration in the visual part (frontend) of Home Assistant. From it we can visually configure integrations, users, areas, automations…
  • frontend: Enables the Home Assistant visual environment. Can be disabled if you want to use other visual environments (dashboard). This integration also includes several interesting parameters such as loading HTML, CSS or JavaScript code, or being able to add different themes to change colors and style.

          primary-color: pink
          primary-color: blue

    Once defined, they can be selected from user settings. The community itself has a large list of themes to use.

  • history: Enables historical log. Based on the recorder component configuration keeps a record of all components and entities that are not hidden. It also allows configuring entities to be excluded or included in the history. The whole record can be viewed from the History tab.
  • logbook: Enables the display of the historical log (just show it), in reverse chronological mode; a list of the changes that have occurred in Home Assistant over time. Again, entities can be included or excluded. It can be viewed from the Logbook tab.
  • map: Enables the map that shows the devices tracked by Home Assistant. It can be viewed from the Map tab.
  • mobile_app: Enables integration of mobile applications with Home Assistant. If you are not going to use external applications that integrate Home Assistant, you can disable or delete this integration.
  • person: Enables integration of people with their device_tracker entities using YAML. That is, you can configure people with their tracking entities using the visual editor, or use the file configuration.yaml.

      - name: Dani
        id: dani1234
        user_id: 12345678912345678912345678912345
          - device_tracker.dani_phone
  • script: Enables the use of Scripts. As with Automations, it is normal to use the line script: !include scripts.yaml and define the scripts through YAML in the file itself or visually through the Configuration section.
  • ssdp: Enables SSDP (Simple Service Discovery Protocol). This integration searches the network for devices and services to automatically add them to the Integrations section and we don’t have to configure them manually.
  • sun: Enables the Sun entity that simulates the sun’s position based on the current position. Automatically obtains the configuration of the data indicated in the General Configuration of our server. It is highly recommended to indicate the elevation so that the data are accurate.
  • system_health: Enables the API that offers the information of different diagnostics of the system and its components. It can be consulted from the Tools for Developers section, Info tab.
  • updater: Enables the sensor to check daily for available system updates. By default it collects certain data (none sensitive) to be sent to Home Assistant servers to improve the service.

    Although it is indicated that it does not make much sense to use this sensor in because it already has an update warning system, it is necessary if you want to show a sensor that notifies us visually.

  • zeroconf: Enables the Zeroconf/Avahi/Bonjour component that searches the network for services and devices related to Zeroconf and automatically adds them to the Integrations section.

Finally, remember to delete and modify the entities you no longer use. For example, if you include the entity person manually in the configuration.yaml file, you have to remember to delete the old entity in the Configuration -> Persons section, and in the Configuration -> Entity Registry section and if you have called it with the same id, modify the new entity so that it has the id you want.


Once added the integrations that interest us and carefully delete only those that we are sure we will not use, we have improved the performance of our server Home Assistant and know a little more about the platform.

This and other articles complement the documentation of the GitHub repository where all the configuration of my house is available.

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