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Added examples and helpful info to HDMI-CEC component page (#700)

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* Update hdmi_cec.markdown

* Update hdmi_cec.markdown

* Update hdmi_cec.markdown
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andrew-curtis 2016-07-30 20:49:41 +10:00 committed by Fabian Affolter
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source/_components/hdmi_cec.markdown
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@ -29,6 +29,18 @@ The computer running Home Assistant must support CEC, and of course be connected
`ln -s /usr/local/lib/python3.4/dist-packages/cec <your venv>/lib/python3.4/site-packages`
e.g. the default virtual environment for the Raspberry Pi AIO would be as follows.
`ln -s /usr/local/lib/python3.4/dist-packages/cec /srv/hass/hass_venv/lib/python3.4/site-packages`
If after symlinking and adding `hdmi_cec:` to your configuration you are getting the following error in your logs,
`* failed to open vchiq instance`
you will also need to add the user account HASS runs under, to the `video` group. To add the HASS user account to the `video` group run the following command.
`usermod -a -G video <hass_user_account>`
## {% linkable_title Configuration Example %}
In the following example, a Pi Zero running Home Assistant is on a TV's HDMI port 1. HDMI port 2 is attached to a AV receiver. Three devices are attached to the AV receiver on HDMI ports 1 through 3.
@ -54,7 +66,15 @@ Call the `hdmi_cec/select_device` service with the name of the device to select,
"device": "Chromecast"
}
```
So an Automation action using the example above would look something like this.
```yaml
action:
service: hdmi_cec.select_device
data:
device: Chromecast
```
### {% linkable_title Power On %}
Call the `hdmi_cec/power_on` service (no arguments) to power on any devices that support this function.