Index: DGDefs.h
===================================================================
diff -u -ra939fd0358c96b2bbd880705518b5f40be104888 -r1ea146115c041879f1ef9b07013fa5c550eff68c
--- DGDefs.h	(.../DGDefs.h)	(revision a939fd0358c96b2bbd880705518b5f40be104888)
+++ DGDefs.h	(.../DGDefs.h)	(revision 1ea146115c041879f1ef9b07013fa5c550eff68c)
@@ -237,22 +237,43 @@
     NUM_OF_DG_CHEM_DISINFECT_STATES                     ///< Number of chemical disinfect mode states
 };
 typedef enum DG_Chem_States DG_CHEM_DISINFECT_STATE_T;  ///< Type for DG chemical disinfect states enumeration
+
+/**@}*/
+
+/**
+ *  @addtogroup DGServiceMode
+ *  @{
+ */
+
+/// Enumeration of service mode states.
+enum DG_Service_States
+{
+    DG_SERVICE_STATE_START = 0,                     ///< Start service mode state
+    NUM_OF_DG_SERVICE_STATES                        ///< Number of service mode states
+};
+typedef enum DG_Service_States DG_SERVICE_STATE_T;  ///< Type for DG service states enumeration
+
+/**@}*/
+
+/**
+ *  @addtogroup DGCommand
+ *  @{
+ */
+
+/// 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
+    NUM_OF_DG_COMMANDS                  ///< Number of DG commands
+};
+typedef enum DG_Command DG_COMMAND_T;   ///< Type for DG commands enumeration
 
 /**@}*/
 
-/**
- *  @addtogroup DGServiceMode
- *  @{
- */
-
-/// Enumeration of service mode states.
-enum DG_Service_States
-{
-    DG_SERVICE_STATE_START = 0,                     ///< Start service mode state
-    NUM_OF_DG_SERVICE_STATES                        ///< Number of service mode states
-};
-typedef enum DG_Service_States DG_SERVICE_STATE_T;  ///< Type for DG service states enumeration
-
-/**@}*/
-
 #endif