Vizio SmartCat TV support (#2906)

* Vizio SmartCat TV support

* Minor style changes

source/_components/media_player.vizio.markdown

@@ -0,0 +1,93 @@
+---
+layout: page
+title: "Vizio SmartCast TV"
+description: "Instructions how to integrate Vizio SmartCast TV into Home Assistant."
+date: 2017-07-10 19:00
+sidebar: true
+comments: false
+sharing: true
+footer: true
+logo: vizio-smartcast.png
+ha_category: Media Player
+featured: true
+ha_release: 0.49
+ha_iot_class: "Local Polling"
+---
+
+The `vizio` component will allow you to control [SmartCast](https://www.vizio.com/smartcast-app) compatible TVs (2016+ models). 
+
+## Pairing
+
+Before adding TV to Home Assistant you'll need to pair it manually, to do so follow these steps:
+
+Install the command-line tool using pip (you can choose to download it manually):
+
+```bash
+$ pip3 install git+https://github.com/vkorn/pyvizio.git@master
+$ pip3 install -I .
+```
+
+Make sure that your TV is on, as sometimes it won't show PIN code if it wasn't on during pairing initialization.
+If you don't know IP address of your TV run following command:
+
+```bash 
+$ pyvizio --ip=0 --auth=0 discover
+```
+
+Initiate pairing:
+
+```bash
+$ pyvizio --ip={ip} pair
+```
+
+Initiation will show you two different values:
+
+| Value           | Description          |
+|:----------------|:---------------------|
+| Challenge type  | Usually it's should be `"1"`, if it's not the case for you, use additional parameter `--ch_type=your_type` in the next step |
+| Challenge token | Token required to finalize pairing in the next step |
+
+Finally, at this point PIN code should be displayed at the top of your TV. With all these values, you can now finish pairing:
+
+```bash
+$ pyvizio --ip={ip} pair_finish --token={challenge_token} --pin={tv_pin} 
+```
+
+You will need authentication token returned by this command to configure Home Assistant. 
+
+## Configuration
+
+To add your Vizio TV to your installation, add following to your `configuration.yaml` file: 
+
+```yaml
+# Example configuration.yaml entry
+media_player:
+  - platform: vizio
+    host: IP_ADDRESS
+    access_token: AUTH_TOKEN
+```
+
+Configuration variables:
+
+- **host** (*Required*): IP address of your TV.
+- **access_token** (*Required*): Authentication token you've received in last step of the pairing process.
+
+## Notes and limitations
+
+### Turning TV on
+
+If you do have `Power Mode` of your TV configured to be `Eco Mode`, turning device ON won't work.
+
+### Changing tracks 
+
+Changing tracks works like channels switching. If you have source other than regular TV it might end do nothing. 
+
+### Sources
+
+Source list shows all external devices connected to the TV through HDMI plus list of internal devices (TV mode, Chrome Cast, etc.).
+
+<p class='note'>
+Vizio SmartCast service is accessible through HTTPS with self-signed certificate. It means that if you have low LOGLEVEL in your Home Assistant configuration, you'll see a lot of warnings like this `InsecureRequestWarning: Unverified HTTPS request is being made. Adding certificate verification is strongly advised.` 
+
+As an option, you could proxy all calls for example through NGINX. 
+</p>