plex sensor (#526)

source/_components/sensor.plex.markdown

@@ -0,0 +1,33 @@
+---
+layout: page
+title: "Plex Sensor"
+description: "How to add a Plex sensor to Home Assistant."
+date: 2016-06-3 08:19
+sidebar: true
+comments: false
+sharing: true
+footer: true
+logo: plex.png
+ha_category: Sensor
+ha_release: 0.21
+---
+
+This sensor platform will monitor activity on a given Plex Media Server.  It will create a sensor that shows the number of
+currently watching users as the state.  If you click the sensor for more details it will show you who is watching what.
+
+If your plex server is on the same local network as Home Assistant, all you need to provide in the configuration.yaml
+is the host or ip address.  If you want to access a remote plex server, you must provide the plex username, password,
+and optionally the server name of the remote plex server.  If no server name is given it will use the first server listed.
+
+Example Configuration:
+```yaml
+sensor:
+  platform: plex
+  name: Plex Spy         *optional, default Plex
+  host: 192.168.1.100    *optional, default localhost
+  port: 32400            *optional, default 32400
+  username: plexuser     *optional, use for remote access
+  password: plexpw       *optional, use for remote access
+  server: MyPlexServer   *optional, use for remote access
+```
+