Add dfplayer volume up/down actions (#1212)

components/dfplayer.rst

@@ -180,6 +180,28 @@ Configuration options:
 - **volume** (**Required**, int, :ref:`templatable <config-templatable>`): The volume value.
   Valid values goes from ``0`` to ``30``.
 
+``dfplayer.volume_up`` Action
+-----------------------------
+
+Turn volume up.
+
+.. code-block:: yaml
+
+    on_...:
+      then:
+        - dfplayer.volume_up
+
+``dfplayer.volume_down`` Action
+-------------------------------
+
+Turn volume down.
+
+.. code-block:: yaml
+
+    on_...:
+      then:
+        - dfplayer.volume_down
+
 ``dfplayer.set_eq`` Action
 --------------------------
 
@@ -392,6 +414,14 @@ Sample code
         then:
           - dfplayer.random
 
+      - service: dfplayer_volume_up
+        then:
+          - dfplayer.volume_up
+
+      - service: dfplayer_volume_down
+        then:
+          - dfplayer.volume_down
+
 See Also
 --------