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<h1 class="title indent">
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YAML
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</h1>
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<p>Home Assistant uses the <a href="http://yaml.org/">YAML</a> syntax for configuration. YAML might take a while to get used to but is really powerful in allowing you to express complex configurations.</p>
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<p>For each component that you want to use in Home Assistant, you add code in your <code class="highlighter-rouge">configuraton.yaml</code> file to specify its settings.
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The following example entry specifies that you want to use the <a href="/components/notify">notify component</a> with the <a href="/components/notify.pushbullet">pushbullet platform</a>.</p>
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<div class="language-yaml highlighter-rouge"><pre class="highlight"><code><span class="s">notify</span><span class="pi">:</span>
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<span class="s">platform</span><span class="pi">:</span> <span class="s">pushbullet</span>
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<span class="s">api_key</span><span class="pi">:</span> <span class="s2">"</span><span class="s">o.1234abcd"</span>
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<span class="s">name</span><span class="pi">:</span> <span class="s">pushbullet</span>
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</code></pre>
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</div>
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<ul>
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<li>A <strong>component</strong> provides the core logic for some functionality (like <code class="highlighter-rouge">notify</code> provides sending notifications).</li>
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<li>A <strong>platform</strong> makes the connection to a specific software or hardware platform (like <code class="highlighter-rouge">pushbullet</code> works with the service from pushbullet.com).</li>
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</ul>
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<p>The basics of YAML syntax are block collections and mappings containing key-value pairs. Each item in a collection starts with a <code class="highlighter-rouge">-</code> while mappings have the format <code class="highlighter-rouge">key: value</code>. If you specify duplicate keys, the last value for a key is used.</p>
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<p>Note that indentation is an important part of specifying relationships using YAML. Things that are indented are nested “inside” things that are one level higher. So in the above example, <code class="highlighter-rouge">platform: pushbullet</code> is a property of (nested inside) the <code class="highlighter-rouge">notify</code> component.
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Getting the right indentation can be tricky if you’re not using an editor with a fixed width font. Tabs are not allowed to be used for indentation. Convention is to use 2 spaces for each level of indentation.
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You can use <a href="http://www.yamllint.com/">YAMLLint</a> to check if your YAML-syntax is correct before loading it into Home Assistant which will save you some time.
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<em>Please pay attention on not putting in private data, as it is a 3rd-party website not maintained by Home Assistant.</em></p>
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<p>Lines that start with <strong>#</strong> are comments and are ignored by the system.</p>
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<p>The next example shows an <a href="/components/input_select">input_select</a> component that uses a block collection for the options values.
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The other properties (like name) are specified using mappings. Note that the second line just has <code class="highlighter-rouge">threat:</code> with no value on the same line. Here threat is the name of the input_select and the values for it are everything nested below it.</p>
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<div class="language-yaml highlighter-rouge"><pre class="highlight"><code><span class="s">input_select</span><span class="pi">:</span>
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<span class="s">threat</span><span class="pi">:</span>
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<span class="s">name</span><span class="pi">:</span> <span class="s">Threat level</span>
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<span class="c1"># A collection is used for options</span>
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<span class="s">options</span><span class="pi">:</span>
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<span class="pi">-</span> <span class="s">0</span>
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<span class="pi">-</span> <span class="s">1</span>
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<span class="pi">-</span> <span class="s">2</span>
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<span class="pi">-</span> <span class="s">3</span>
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<span class="s">initial</span><span class="pi">:</span> <span class="s">0</span>
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</code></pre>
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</div>
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<p>The following example shows nesting a collection of mappings in a mapping. In Home Assistant, this would create two sensors that each use the MQTT platform but have different values for their <code class="highlighter-rouge">state_topic</code> (one of the properties used for MQTT sensors).</p>
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<div class="language-yaml highlighter-rouge"><pre class="highlight"><code><span class="s">sensor</span><span class="pi">:</span>
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<span class="pi">-</span> <span class="s">platform</span><span class="pi">:</span> <span class="s">mqtt</span>
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<span class="s">state_topic</span><span class="pi">:</span> <span class="s">sensor/topic</span>
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<span class="pi">-</span> <span class="s">platform</span><span class="pi">:</span> <span class="s">mqtt</span>
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<span class="s">state_topic</span><span class="pi">:</span> <span class="s">sensor2/topic</span>
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</code></pre>
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</div>
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<h3><a href="/getting-started/basic/">Next step: Setting up the basics »</a></h3>
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<div class='edit-github'><a href='https://github.com/home-assistant/home-assistant.github.io/tree/current/source/getting-started/yaml.markdown'>Edit this page on GitHub</a></div>
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<h1 class="title delta">Getting Started Guide</h1>
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<a href='/getting-started/'>Installation </a>
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<li><a href='/getting-started/installation-raspberry-pi/'>Raspberry Pi </a></li>
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<li><a href='/getting-started/installation-raspberry-pi-all-in-one/'>Raspberry Pi All-In-One Installer </a></li>
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<li><a href='/getting-started/installation-synology/'>Synology NAS </a></li>
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<li><a href='/getting-started/updating/'>Updating </a></li>
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<li><a href='/getting-started/troubleshooting/'>Troubleshooting </a></li>
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</ul>
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<li>
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<a href='/getting-started/configuration/'>Configuration </a>
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<ul>
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<li><a class='active' href='/getting-started/yaml/'>YAML </a></li>
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<li><a href='/getting-started/basic/'>Basic information </a></li>
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<li><a href='/getting-started/devices/'>Setting up devices </a></li>
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<li><a href='/getting-started/customizing-devices/'>Customizing devices and services </a></li>
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<li><a href='/getting-started/presence-detection/'>Presence Detection </a></li>
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<li><a href='/getting-started/troubleshooting-configuration/'>Troubleshooting </a></li>
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</ul>
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<li>
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<a href='/getting-started/automation/'>Automation </a>
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<ul>
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<li><a href='/getting-started/automation-create-first/'>Tutorial </a></li>
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<li><a href='/getting-started/automation-trigger/'>Triggers </a></li>
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<li><a href='/getting-started/automation-condition/'>Conditions </a></li>
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<li><a href='/getting-started/automation-action/'>Actions </a></li>
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<li><a href='/getting-started/automation-templating/'>Templates </a></li>
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</ul>
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</li>
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<li>
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<a href='/getting-started/scripts/'>Scripts </a>
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<ul>
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<li><a href='/getting-started/scripts-service-calls/'>Service Calls </a></li>
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<li><a href='/getting-started/scripts-conditions/'>Conditions </a></li>
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</ul>
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</li>
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<li>
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<a href='/getting-started/z-wave/'>Z-Wave </a>
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<ul>
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<li><a href='/getting-started/z-wave-controllers/'>USB Controllers </a></li>
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<li><a href='/getting-started/z-wave-settings/'>Modifying Settings </a></li>
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<li><a href='/getting-started/z-wave-device-specific/'>Device Specific </a></li>
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</ul>
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<a href='/getting-started/autostart/'>Autostart </a>
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<ul>
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<li><a href='/getting-started/autostart-systemd/'>Linux - systemd </a></li>
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<li><a href='/getting-started/autostart-upstart/'>Linux - Upstart </a></li>
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<li><a href='/getting-started/autostart-macos/'>OS X </a></li>
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<li><a href='/getting-started/autostart-synology/'>Synology NAS </a></li>
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</ul>
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</li>
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<li><a href='/topics/'>Advanced Topics </a></li>
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<li><a href='/getting-started/android/'>Add to Android Homescreen </a></li>
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<li><a href='/getting-started/browsers/'>Browser Compatibility List </a></li>
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