303 lines
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HTML
303 lines
16 KiB
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<title>Hass object - Home Assistant</title>
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<meta name="description" content="Introduction to developing with the hass object.">
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<span>Home Assistant</span>
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<header>
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<h1 class="title indent">
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Hass object
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</h1>
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</header>
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<hr class="divider">
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<p>While developing Home Assistant you will see a variable that is everywhere: <code class="highlighter-rouge">hass</code>. This is the Home Assistant instance that will give you access to all the various parts of the system.</p>
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<h3><a class="title-link" name="the-hass-object" href="#the-hass-object"></a> The <code class="highlighter-rouge">hass</code> object</h3>
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<p>The Home Assistant instance contains four objects to help you interact with the system.</p>
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<table>
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<thead>
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<tr>
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<th>Object</th>
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<th>Description</th>
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</tr>
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</thead>
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<tbody>
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<tr>
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<td><code class="highlighter-rouge">hass</code></td>
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<td>This is the instance of Home Assistant. Allows starting, stopping and enqueing new jobs. <a href="https://dev-docs.home-assistant.io/en/master/api/core.html#homeassistant.core.HomeAssistant">See available methods.</a></td>
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</tr>
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<tr>
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<td><code class="highlighter-rouge">hass.config</code></td>
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<td>This is the core configuration of Home Assistant exposing location, temperature preferences and config directory path. <a href="https://dev-docs.home-assistant.io/en/master/api/core.html#homeassistant.core.Config">See available methods.</a></td>
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</tr>
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<tr>
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<td><code class="highlighter-rouge">hass.states</code></td>
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<td>This is the StateMachine. It allows you to set states and track when they are changed. <a href="https://dev-docs.home-assistant.io/en/master/api/core.html#homeassistant.core.StateMachine">See available methods.</a>.</td>
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</tr>
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<tr>
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<td><code class="highlighter-rouge">hass.bus</code></td>
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<td>This is the EventBus. It allows you to trigger and listen for events. <a href="https://dev-docs.home-assistant.io/en/master/api/core.html#homeassistant.core.EventBus">See available methods.</a>.</td>
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</tr>
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<tr>
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<td><code class="highlighter-rouge">hass.services</code></td>
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<td>This is the ServiceRegistry. It allows you to register services. <a href="https://dev-docs.home-assistant.io/en/master/api/core.html#homeassistant.core.ServiceRegistry">See available methods.</a>.</td>
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</tr>
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</tbody>
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</table>
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<h3><a class="title-link" name="where-to-find-hass" href="#where-to-find-hass"></a> Where to find <code class="highlighter-rouge">hass</code></h3>
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<p>Depending on what you’re writing, there are different ways the <code class="highlighter-rouge">hass</code> object is made available.</p>
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<p><strong>Component</strong><br />
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Passed into <code class="highlighter-rouge">setup(hass, config)</code> or <code class="highlighter-rouge">async_setup(hass, config)</code>.</p>
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<p><strong>Platform</strong><br />
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Passed into <code class="highlighter-rouge">setup_platform(hass, config, add_devices, discovery_info=None)</code> or <code class="highlighter-rouge">async_setup_platform(hass, config, async_add_devices, discovery_info=None)</code>.</p>
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<p><strong>Entity</strong><br />
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Available as <code class="highlighter-rouge">self.hass</code> once the entity has been added via the <code class="highlighter-rouge">add_devices</code> callback inside a platform.</p>
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</article>
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<div class='edit-github'><a href='https://github.com/home-assistant/home-assistant.github.io/tree/current/source/developers/development_hass_object.markdown'>Edit this page on GitHub</a></div>
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<div class='section'>
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<h1 class="title delta">Development Guide</h1>
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<ul class='divided sidebar-menu'>
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<li>
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<a href='/developers/'>Introduction </a>
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<ul>
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<li><a href='/developers/architecture/'>Architecture </a></li>
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<li><a href='/developers/architecture_components/'>Components </a></li>
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</ul>
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</li>
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<li>
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<a href='/developers/development/'>Starting with Development </a>
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<ul>
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<li><a href='/developers/development_environment/'>Setting up Environment </a></li>
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<li><a href='/developers/development_submitting/'>Submit your Work </a></li>
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<li><a href='/developers/development_checklist/'>Checklist </a></li>
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<li><a href='/developers/development_guidelines/'>Style guidelines </a></li>
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<li><a href='/developers/development_testing/'>Testing </a></li>
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<li><a href='/developers/development_catching_up/'>Catching up with Reality </a></li>
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<li><a href='/developers/development_validation/'>Validation </a></li>
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</ul>
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</li>
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<li>
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<a href='/developers/development_101/'>Development 101 </a>
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<ul>
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<li><a class='active' href='/developers/development_hass_object/'>Hass object </a></li>
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<li><a href='/developers/development_events/'>Events </a></li>
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<li><a href='/developers/development_states/'>States </a></li>
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<li><a href='/developers/development_services/'>Services </a></li>
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<li><a href='/developers/development_config/'>Config </a></li>
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</ul>
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<a href='/developers/add_new_platform/'>Creating a new platform (to support a new device) </a>
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<ul>
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<li><a href='/developers/code_review_platform/'>Checklist creating a platform </a></li>
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<li><a href='/developers/platform_example_sensor/'>Example sensor platform </a></li>
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<li><a href='/developers/platform_example_light/'>Example light platform </a></li>
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</ul>
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</li>
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<li>
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<a href='/developers/creating_components/'>Adding a new component </a>
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<ul>
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<li><a href='/developers/code_review_component/'>Checklist creating a component </a></li>
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<li><a href='/developers/component_loading/'>Loading components </a></li>
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<li><a href='/developers/component_deps_and_reqs/'>Requirements & Dependencies </a></li>
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<li><a href='/developers/component_events/'>Handling events </a></li>
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<li><a href='/developers/component_states/'>States </a></li>
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<li><a href='/developers/component_visibility/'>Visibility </a></li>
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<li><a href='/developers/component_generic_discovery/'>Loading Platforms </a></li>
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<li><a href='/developers/component_discovery/'>Component Discovery </a></li>
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</ul>
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</li>
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<li>
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<a href='/developers/intent/'>Intents (handling voice responses) </a>
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<ul>
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<li><a href='/developers/intent/firing/'>Firing intents </a></li>
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<li><a href='/developers/intent/handling/'>Handling intents </a></li>
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<li><a href='/developers/intent/conversation/'>Registering sentences </a></li>
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</ul>
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</li>
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<li>
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<a href='/developers/asyncio/'>Asynchronous Programming </a>
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<ul>
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<li><a href='/developers/asyncio_101/'>Introduction to asyncio </a></li>
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<li><a href='/developers/asyncio_categorizing_functions/'>Categorizing Functions </a></li>
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<li><a href='/developers/asyncio_working_with_async/'>Working with Async </a></li>
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<li><a href='/developers/asyncio_misc/'>Miscellaneous </a></li>
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</ul>
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</li>
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<li>
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<a href='/developers/frontend/'>Frontend Development </a>
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<ul>
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<li><a href='/developers/frontend_add_card/'>Add State Card </a></li>
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<li><a href='/developers/frontend_add_more_info/'>Add More Info Dialog </a></li>
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<li><a href='/developers/frontend_creating_custom_panels/'>Add Custom Panels </a></li>
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<li><a href='/developers/frontend_creating_custom_ui/'>Add Custom UI </a></li>
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</ul>
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</li>
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<li>
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<a href='/developers/hassio/architecture/'>Hass.io architecture </a>
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<ul>
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<li><a href='/developers/hassio/debugging/'>Debugging Hass.io </a></li>
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</ul>
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</li>
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<li>
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<a href='/developers/hassio/addon_development/'>Hass.io Add-on Development </a>
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<ul>
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<li><a href='/developers/hassio/addon_tutorial/'>Tutorial: Making your first add-on </a></li>
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<li><a href='/developers/hassio/addon_config/'>Configuration </a></li>
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<li><a href='/developers/hassio/addon_communication/'>Communication </a></li>
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<li><a href='/developers/hassio/addon_testing/'>Local Testing </a></li>
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</ul>
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</li>
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<li>
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<a href='/developers/api/'>API </a>
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<ul>
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<li><a href='https://dev-docs.home-assistant.io/en/dev/'>Python API </a></li>
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<li><a href='/developers/server_sent_events/'>Server-sent events </a></li>
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