Index: DGDefs.h
===================================================================
diff -u -r83013a57b0b7a91f650a889fb096b4141cd26f00 -r18bea2c4a495d69aeed8000ebf0f9b14013de8c3
--- DGDefs.h	(.../DGDefs.h)	(revision 83013a57b0b7a91f650a889fb096b4141cd26f00)
+++ DGDefs.h	(.../DGDefs.h)	(revision 18bea2c4a495d69aeed8000ebf0f9b14013de8c3)
@@ -263,13 +263,14 @@
 /// Enumeration of available DG commands.
 enum DG_Command
 {
-    DG_CMD_SWITCH_RESERVOIR = 0,        ///< Command to request DG switch reservoirs
-    DG_CMD_START_DRAIN = 1,             ///< Command to request DG to start drain
-    DG_CMD_STOP_DRAIN = 2,              ///< Command to request DG to stop drain
-    DG_CMD_START_FILL = 3,              ///< Command to request DG to start fill
-    DG_CMD_STOP_FILL = 4,               ///< Command to request DG to stop fill
-    DG_CMD_START_TRIMMER_HEATER = 5,    ///< Command to request DG to start trimmer heater
-    DG_CMD_STOP_TRIMMER_HEATER = 6,     ///< Command to request DG to stop trimmer heater
+    DG_CMD_NONE = 0,                    ///< Not a command
+    DG_CMD_SWITCH_RESERVOIR = 1,        ///< Command to request DG switch reservoirs
+    DG_CMD_START_DRAIN = 2,             ///< Command to request DG to start drain
+    DG_CMD_STOP_DRAIN = 3,              ///< Command to request DG to stop drain
+    DG_CMD_START_FILL = 4,              ///< Command to request DG to start fill
+    DG_CMD_STOP_FILL = 5,               ///< Command to request DG to stop fill
+    DG_CMD_START_TRIMMER_HEATER = 6,    ///< Command to request DG to start trimmer heater
+    DG_CMD_STOP_TRIMMER_HEATER = 7,     ///< Command to request DG to stop trimmer heater
     NUM_OF_DG_COMMANDS                  ///< Number of DG commands
 };
 typedef enum DG_Command DG_COMMAND_T;   ///< Type for DG commands enumeration