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Site updated at 2015-09-20 05:11:04 UTC

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Paulus Schoutsen 2015-09-19 22:11:04 -07:00
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@ -53,9 +53,10 @@
<a href="/getting-started/">Getting started</a>
<ul>
<li><a href='/getting-started/'>Installing Home Assistant</a></li>
<li><a href='/getting-started/configuration.html'>Initial configuration</a></li>
<li><a href='/getting-started/configuration.html'>Configuration basics</a></li>
<li><a href='/getting-started/devices.html'>Adding devices</a></li>
<li><a href='/getting-started/automation.html'>Automation</a></li>
<li><a href='/components/'>Component overview</a></li>
<li><a href='/getting-started/android.html'>Setting up Android</a></li>
</ul>
</li>
<li>
@ -162,6 +163,95 @@ Inspried by a <a href="https://github.com/balloob/home-assistant/issues/310">fea
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<article class="listing">
<header>
<h1 class="beta">
<a href="/blog/2015/09/13/home-assistant-meets-ifttt/">Home Assistant meets IFTTT</a>
</h1>
<div class="meta clearfix">
<time datetime="2015-09-13T09:28:00-07:00" pubdate data-updated="true"><i class="icon-calendar"></i> September 13, 2015</time>
<span class="byline author vcard"><i class='icon-user'></i> Paulus Schoutsen</span>
<span><i class='icon-time'></i> three minutes reading time</span>
<span>
<i class="icon-tags"></i>
<ul class="tags unstyled">
<li><a class='category' href='/blog/categories/how-to/'>how-to</a></li>
<li><a class='category' href='/blog/categories/release-notes/'>release-notes</a></li>
</ul>
</span>
<a class='comments'
href="/blog/2015/09/13/home-assistant-meets-ifttt/#disqus_thread"
>Comments</a>
</div>
</header>
<div class="entry-content clearfix">
<p> <p>Today we announce the release of Home Assistant v0.7.2 which includes brand new support by
<a href="https://github.com/sfam">@sfam</a> to integrate with <a href="https://ifttt.com">IFTTT</a>. IFTTT stands for If This, Then That and is a
webservice that integrates with almost every possible webservice out there. Adding Home
Assistant to this mix means Home Assistant can connect with all via IFTTT.</p></p>
<p>It is now possible to disable your irregation system if it is going to be cloudy tomorrow or tweet
if your smoke alarm goes off.</p>
<p class='img'>
<img src='/images/blog/2015-09-ifttt/splash.png'>
</p>
<p>Head over to the <a href="/components/ifttt.html">setup instructions</a> to get started with IFTTT. Click the
read more button for some example recipes.</p>
<a class="btn pull-right" href="/blog/2015/09/13/home-assistant-meets-ifttt/#read-more">Read on &rarr;</a>
</div>
</article>
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@ -856,99 +946,6 @@ To update to the latest version, run <code>scripts/update</code>. Please report
</article>
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<header>
<h1 class="beta">
<a href="/blog/2015/05/09/utc-time-zone-awareness/">UTC & Time zone awareness</a>
</h1>
<div class="meta clearfix">
<time datetime="2015-05-09T23:08:00-07:00" pubdate data-updated="true"><i class="icon-calendar"></i> May 9, 2015</time>
<span class="byline author vcard"><i class='icon-user'></i> Paulus Schoutsen</span>
<span><i class='icon-time'></i> two minutes reading time</span>
<span>
<i class="icon-tags"></i>
<ul class="tags unstyled">
<li><a class='category' href='/blog/categories/core/'>core</a></li>
</ul>
</span>
<a class='comments'
href="/blog/2015/05/09/utc-time-zone-awareness/#disqus_thread"
>Comments</a>
</div>
</header>
<p>I have recently merged code to refactor Home Assistant to use only UTC times internally. A much needed refactor. I&rsquo;ve added some extra test coverage to time sensitive parts to ensure stability. The code has been live in the dev branch for the last 9 days and will be soon released to the master branch.</p>
<p>From now on all internal communication will be done in UTC: time changed events, datetime attributes of states, etc. To get the current time in UTC you can call <code>homeassistant.util.dt.utcnow()</code>. This is a timezone aware UTC datetime object. <a href="https://github.com/balloob/home-assistant/blob/dev/homeassistant/util/dt.py"><code>homeassistant.util.dt</code></a> is a new util package with date helpers.</p>
<p>There is also such a thing as local time. Local time is based on the time zone that you have setup in your <code>configuration.yaml</code>. Local times should only be used for user facing information: logs, frontend and automation settings in <code>configuration.yaml</code>.</p>
<h3>Setting up your time zone</h3>
<p>Setting up a time zone happens in <code>configuration.yaml</code>. If you have no time zone setup, it will be auto detected using the existing detection code using <a href="https://freegeoip.net">freegeoip.net</a>. You can find a list of compatible time zones on <a href="http://en.wikipedia.org/wiki/List_of_tz_database_time_zones">Wikipedia</a>.</p>
<figure class='code'><figcaption><span></span></figcaption><div class="highlight"><table><tr><td class="gutter"><pre class="line-numbers"><span class='line-number'>1</span>
<span class='line-number'>2</span>
</pre></td><td class='code'><pre><code class='yaml'><span class='line'><span class="l-Scalar-Plain">homeassistant</span><span class="p-Indicator">:</span>
</span><span class='line'> <span class="l-Scalar-Plain">time_zone</span><span class="p-Indicator">:</span> <span class="l-Scalar-Plain">America/Los_Angeles</span>
</span></code></pre></td></tr></table></div></figure>
<h3>Compatibility</h3>
<p>The changes to the code are mostly backwards compatible. The old <code>hass.track_time_change</code> and <code>hass.track_point_in_time</code> use now internally two new methods: <code>hass.track_utc_time_change</code> and <code>hass.track_point_in_utc_time</code>. The usage of the old methods have not changed and should be backwards compatible.</p>
<p>This refactor adds a new migration for the database adding a <code>utc_offset</code> column to events and states. This information is currently not used but can prove useful in the future when we start analyzing the historical data.</p>
<h3><a class='title-link' name='backwards-incompatible-stuff' href='#backwards-incompatible-stuff'></a> Backwards incompatible stuff</h3>
<p>All built-in components have been upgraded. The following list is only for people that run custom components:</p>
<ul>
<li><code>hass.track_time_change</code> and <code>hass.track_point_in_time</code> will now return a time zone aware datetime object. Python does not allow comparing a naive with an aware datetime object.</li>
<li>the sun attributes for rising and setting are now in UTC. The methods <code>sun.next_rising(hass)</code> and <code>sun.next_setting(hass)</code> are backwards compatible, just be careful if you used to read the raw attributes.</li>
<li>the API sends all times in UTC. If you use anything else besides the frontend to talk to HA, make sure it handles it differently.</li>
</ul>
</article>
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