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Add note for Hass.io users (#3137)

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Fabian Affolter 2017-08-06 10:09:13 +02:00 • committed by GitHub
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source/_components/hdmi_cec.markdown
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@ -13,7 +13,7 @@ ha_release: 0.23
ha_iot_class: "Local Push"
---
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 `cec-client` (part of the `libcec` package) to listen to traffic on the CEC bus and discover the correct numbers.
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 `cec-client` (part of the `libcec` package) to listen to traffic on the CEC bus and discover the correct numbers.
## {% linkable_title CEC Setup %}
@ -25,6 +25,10 @@ The computer running Home Assistant must support CEC, and of course be connected
[libcec](https://github.com/Pulse-Eight/libcec) must be installed for this component to work. Follow the installation instructions for your environment, provided at the link. `libcec` installs Python 3 bindings by default as a system Python module. If you are running Home Assistant in a [Python virtual environment](/getting-started/installation-virtualenv/), make sure it can access the system module, by either symlinking it or using the `--system-site-packages` flag.
<p class='note'>
If you are using [Hass.io](/hassio/) then just move forward to the configuration as all requirements are already fullfilled.
</p>
#### {% linkable_title Symlinking into virtual environment %}
Create a symlink to the `cec` installation. Keep in mind different installation methods will result in different locations of cec.