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@ -25,9 +25,9 @@ For more information about each part in this overview, <a href='/blog/2014/12/26
Overview of the home automation landscape Overview of the home automation landscape
</p> </p>
The Home Assistant core is responsible for Home Control. Home Assistant has four parts to make this possible: The Home Assistant core is responsible for Home Control. Home Assistant contains four parts which make this possible:
* **Event Bus**: facilitates the firing and listening of events--the beating heart of Home Assistant. * **Event Bus**: facilitates the firing and listening of events -- the beating heart of Home Assistant.
* **State Machine**: keeps track of the states of things and fires a `state_changed` event when a state has been changed. * **State Machine**: keeps track of the states of things and fires a `state_changed` event when a state has been changed.
* **Service Registry**: listens on the event bus for `call_service` events and allows other code to register services. * **Service Registry**: listens on the event bus for `call_service` events and allows other code to register services.
* **Timer**: sends a `time_changed` event every 1 second on the event bus. * **Timer**: sends a `time_changed` event every 1 second on the event bus.