Documentation updates on mpd component (long overdue), and the envislink component. (#1028)

source/_components/media_player.mpd.markdown

@@ -2,7 +2,7 @@
 layout: page
 title: "Music Player Daemon (MPD)"
 description: "Instructions how to integrate Music Player Daemon into Home Assistant."
-date: 2015-06-02 08:00
+date: 2016-09-30 23:06
 sidebar: true
 comments: false
 sharing: true
@@ -15,6 +15,8 @@ ha_release: pre 0.7
 
 The `mpd` platform allows you to control a [Music Player Daemon](http://www.musicpd.org/) from Home Assistant. Unfortunatly you will not be able to manipulate the playlist (add or delete songs) or add transitions between the songs. 
 
+Even though no playlist manipulation is possible, it is possible to use the play_media service to load an existing saved playlist as part of an automation or scene.
+
 To add MPD to your installation, add the following to your `configuration.yaml` file:
 
 ```yaml
@@ -34,5 +36,22 @@ Configuration variables:
 - **location** (*Optional*): Location of your Music Player Daemon. Defaults to "MPD".
 - **password** (*Optional*): Password for your Music Player Daemon.
 
+Example script to load a saved playlist called "DeckMusic" and set the volume:
+
+```yaml
+relaxdeck:
+    sequence:
+    - service: media_player.play_media
+      data:
+        entity_id: media_player.main
+        media_content_type: playlist
+        media_content_id: DeckMusic
+
+    - service: media_player.volume_set
+      data:
+        entity_id: media_player.main
+        volume_level: 0.60
+```
+
 This platform works with [Music Player Daemon](http://www.musicpd.org/) and [mopidy](https://www.mopidy.com/) with [Mopidy-MPD](https://docs.mopidy.com/en/latest/ext/mpd/) as used by [Pi MusicBox](http://www.pimusicbox.com/).