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Extract developer site (#5249)

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* Extract developer site

* Fix title in sidebar

* Update dev section reference

* Update edit in github link on help page
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Paulus Schoutsen 2018-04-26 11:14:55 -04:00 • committed by GitHub
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source/developers/architecture.markdown
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@ -10,32 +10,6 @@ footer: true
og_image: /images/architecture/ha_architecture.svg
---
Before we dive into the Home Assistant architecture, let's get a clear overview of the home automation landscape as a whole. This way, we can show how the different parts of Home Assistant fit into the picture.
For more information about each part in this overview, <a href='/blog/2014/12/26/home-control-home-automation-and-the-smart-home/'>check out our blog</a>. Here's the tl;dr version of the blog:
* Home Control is responsible for collecting information and controlling devices.
* Home Automation triggers commands based on user configurations.
* Smart Home triggers commands based on previous behavior.
<p class='img'>
<a href='{{site_root}}/images/architecture/home_automation_landscape.svg' name='landscape'>
<img alt='Home Automation landscape'
src='{{site_root}}/images/architecture/home_automation_landscape.svg' />
</a>
Overview of the home automation landscape
</p>
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.
* **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.
* **Timer**: sends a `time_changed` event every 1 second on the event bus.
<p class='img'>
<a href='/images/architecture/ha_architecture.svg' name='architecture'>
<img src='/images/architecture/ha_architecture.svg' />
</a>
Overview of the Home Assistant core architecture
</p>
<script>
window.location = 'http://developers.home-assistant.io/docs/en/architecture_index.html';
</script>