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Site updated at 2017-08-06 10:02:40 UTC

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components/hdmi_cec/index.html
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<p>The HDMI CEC component provides services that allow selecting the active device, powering on all devices, setting all devices to standby and creates switch entites for HDMI devices. Devices are defined in the configuration file by associating HDMI port number and a device name. Connected devices that provide further HDMI ports, such as Soundbars and AVRs are also supported. Devices are listed from the perspective of the CEC-enabled Home Assistant device. Any connected device can be listed, regardless of whether it supports CEC. Ideally the HDMI port number on your device will map correctly the CEC physical address. If it does not, use <code class="highlighter-rouge">cec-client</code> (part of the <code class="highlighter-rouge">libcec</code> package) to listen to traffic on the CEC bus and discover the correct numbers.</p>
<p>The <code class="highlighter-rouge">hdmi_cec</code> component provides services that allow selecting the active device, powering on all devices, setting all devices to standby and creates switch entites for HDMI devices. Devices are defined in the configuration file by associating HDMI port number and a device name. Connected devices that provide further HDMI ports, such as Soundbars and AVRs are also supported. Devices are listed from the perspective of the CEC-enabled Home Assistant device. Any connected device can be listed, regardless of whether it supports CEC. Ideally the HDMI port number on your device will map correctly the CEC physical address. If it does not, use <code class="highlighter-rouge">cec-client</code> (part of the <code class="highlighter-rouge">libcec</code> package) to listen to traffic on the CEC bus and discover the correct numbers.</p>
<h2><a class="title-link" name="cec-setup" href="#cec-setup"></a> CEC Setup</h2>
<h3><a class="title-link" name="adapter" href="#adapter"></a> Adapter</h3>
<p>The computer running Home Assistant must support CEC, and of course be connected via HDMI to a device also supporting CEC. You can purchase a <a href="https://www.pulse-eight.com/p/104/usb-hdmi-cec-adapter">USB CEC adapter</a> to add support if necessary. Note that all Raspberry Pi models support CEC natively.</p>
<h3><a class="title-link" name="libcec" href="#libcec"></a> libcec</h3>
<p><a href="https://github.com/Pulse-Eight/libcec">libcec</a> must be installed for this component to work. Follow the installation instructions for your environment, provided at the link. <code class="highlighter-rouge">libcec</code> installs Python 3 bindings by default as a system Python module. If you are running Home Assistant in a <a href="/getting-started/installation-virtualenv/">Python virtual environment</a>, make sure it can access the system module, by either symlinking it or using the <code class="highlighter-rouge">--system-site-packages</code> flag.</p>
<p class="note">
If you are using <a href="/hassio/">Hass.io</a> then just move forward to the configuration as all requirements are already fullfilled.
</p>
<h4><a class="title-link" name="symlinking-into-virtual-environment" href="#symlinking-into-virtual-environment"></a> Symlinking into virtual environment</h4>
<p>Create a symlink to the <code class="highlighter-rouge">cec</code> installation. Keep in mind different installation methods will result in different locations of cec.</p>
<div class="language-bash highlighter-rouge"><pre class="highlight"><code><span class="gp">$ </span>ln -s /path/to/your/installation/of/cec /path/to/your/venv/lib/python3.4/site-packages