Index: firmware/App/Services/SystemComm.c
===================================================================
diff -u -r98f34c2ab63d51a1bf248db454ebc04e184d4748 -rd6c75118f4e5792b40b744a0b29e44c78368a469
--- firmware/App/Services/SystemComm.c	(.../SystemComm.c)	(revision 98f34c2ab63d51a1bf248db454ebc04e184d4748)
+++ firmware/App/Services/SystemComm.c	(.../SystemComm.c)	(revision d6c75118f4e5792b40b744a0b29e44c78368a469)
@@ -204,6 +204,10 @@
  *************************************************************************/
 void checkInFromUI( void )
 {
+    if ( FALSE == uiDidCommunicate )
+    {   // Start DG check-in timer when UI first communicates
+        timeOfLastDGCheckIn = getMSTimerCount();
+    }
     uiIsCommunicating = TRUE;
     timeOfLastUICheckIn = getMSTimerCount();
     uiDidCommunicate = TRUE;
@@ -930,11 +934,12 @@
         {
             activateAlarmNoData( ALARM_ID_UI_COMM_TIMEOUT );
         }
+        if ( TRUE == didTimeout( timeOfLastDGCheckIn, DG_COMM_TIMEOUT_IN_MS ) )
+        {
+            activateAlarmNoData( ALARM_ID_DG_COMM_TIMEOUT );
+            dgIsCommunicating = FALSE;
+        }
     }
-    if ( TRUE == didTimeout( timeOfLastDGCheckIn, DG_COMM_TIMEOUT_IN_MS ) )
-    {
-        dgIsCommunicating = FALSE;
-    }
 }
 
 /*********************************************************************//**
@@ -1179,26 +1184,42 @@
             handleTreatmentParametersFromUI( message );
             break;
 
-        case MSG_ID_UI_START_TREATMENT:
-            handleUIStartTreatmentMsg( message );
+        case MSG_ID_UI_INITIATE_TREATMENT_REQUEST:
+            handleInitiateTreatmentRequest( message );
             break;
 
+        case MSG_ID_UI_START_TREATMENT_REQUEST:
+            handleStartTreatmentRequest( message );
+            break;
+
         case MSG_ID_UI_USER_CONFIRM_TREATMENT_PARAMS:
             handleUIUserConfirmTreatmentParameters( message );
             break;
 
-        case MSG_ID_UI_TREATMENT_END_REQUEST:
-            handleUIUserEndTreatmentRequest( message );
-            break;
-
         case MSG_ID_UI_PRESSURE_LIMITS_CHANGE_REQUEST:
             handleChangePressureLimitsRequest( message );
             break;
 
+        case MSG_ID_UI_HEPARIN_PAUSE_RESUME_REQUEST:
+            handleHeparinCommandRequest( message );
+            break;
+
         case MSG_ID_UI_SET_UF_VOLUME_PARAMETER:
             handleUFVolumeSetRequest( message );
             break;
 
+        case MSG_ID_UI_RINSEBACK_CMD:
+            handlRinsebackCmd( message );
+            break;
+
+        case MSG_ID_UI_RECIRC_CMD:
+            handleTreatmentRecircCmd( message );
+            break;
+
+        case MSG_ID_UI_TX_END_CMD:
+            handleTreatmentEndCmd( message );
+            break;
+
         case MSG_ID_DG_COMMAND_RESPONSE:
             handleDGCmdResp( message );
             break;
@@ -1207,8 +1228,32 @@
             handleTesterLogInRequest( message );
             break;
 
+        case MSG_ID_HD_SET_CALIBRATION_RECORD:
+            handleSetHDCalibrationRecord( message );
+            break;
+
+        case MSG_ID_HD_GET_CALIBRATION_RECORD:
+            handleGetHDCalibrationRecord( message );
+            break;
+
+        case MSG_ID_HD_SET_SYSTEM_RECORD:
+            handleSetHDSystemRecord( message );
+            break;
+
+        case MSG_ID_HD_GET_SYSTEM_RECORD:
+            handleGetHDSystemRecord( message );
+            break;
+
+        case MSG_ID_HD_GET_SERVICE_RECORD:
+            handleGetHDServiceRecord( message );
+            break;
+
+        case MSG_ID_HD_SET_SERVICE_RECORD:
+            handleSetHDServiceRecord( message );
+            break;
+
         default:
-            // TODO - unrecognized message ID received - ignore
+            // Unrecognized message ID received - ignore
             break;
     }
 
@@ -1259,6 +1304,10 @@
 
             case MSG_ID_BLOOD_FLOW_SEND_INTERVAL_OVERRIDE:
                 handleTestBloodFlowBroadcastIntervalOverrideRequest( message );
+                break;
+
+            case MSG_ID_TREATMENT_TIME_REMAINING_OVERRIDE:
+                handleTestTreatmentTimeRemainingOverrideRequest( message );
                 break;
 
             case MSG_ID_BLOOD_PUMP_MEAS_SPEED_OVERRIDE:
@@ -1373,18 +1422,6 @@
                 handleTestHDAccelBroadcastIntervalOverrideRequest( message );
                 break;
 
-            case MSG_ID_HD_ACCEL_SET_CALIBRATION:
-                handleSetAccelCalibration( message );
-                break;
-
-            case MSG_ID_HD_BLOOD_FLOW_SET_CALIBRATION:
-                handleSetBloodFlowCalibration( message );
-                break;
-
-            case MSG_ID_HD_DIALYSATE_FLOW_SET_CALIBRATION:
-                handleSetDialysateFlowCalibration( message );
-                break;
-
             case MSG_ID_DIAL_OUT_FLOW_SET_PT_OVERRIDE:
                 handleTestDialOutFlowSetPointOverrideRequest( message );
                 break;
@@ -1447,20 +1484,55 @@
                 handleTestDialOutPumpHomeRequest( message );
                 break;
 
+            case MSG_ID_HD_FLUID_LEAK_SEND_INTERVAL_OVERRIDE:
+                handleSetFluidLeakBroadcastIntervalOverrideRequest( message );
+                break;
+
+            case MSG_ID_HD_FLUID_LEAK_STATE_DETECTOR_OVERRIDE:
+                handleSetFluidLeakStateDetectorOverrideRequest( message );
+
+            case MSG_ID_HD_SET_OP_MODE_REQUEST:
+                handleTestSetOpModeRequest( message );
+                break;
+
             case MSG_ID_SUPER_CLEAR_ALARMS_CMD:
                 handleTestSuperClearAlarmsRequest( message );
                 break;
 
-            case MSG_ID_HD_REQUEST_CALIBRATION_DATA:
-                handleTestHDCalibrationDataRequest( message );
+            case MSG_ID_HD_SYRINGE_PUMP_SEND_INTERVAL_OVERRIDE:
+                handleTestSyringePumpDataBroadcastIntervalOverrideRequest( message );
                 break;
 
-            case MSG_ID_HD_ERASE_CALIBRATION_DATA:
-                handleTestEraseHDCalibrationDataRequest( message );
+            case MSG_ID_HD_SYRINGE_PUMP_OPERATION_REQUEST:
+                handleTestSyringePumpOperationRequest( message );
                 break;
 
+            case MSG_ID_HD_SYRINGE_PUMP_MEASURED_RATE_OVERRIDE:
+                handleTestSyringePumpMeasuredRateOverrideRequest( message );
+                break;
+
+            case MSG_ID_HD_SYRINGE_PUMP_MEASURED_FORCE_OVERRIDE:
+                handleTestSyringePumpMeasuredForceOverrideRequest( message );
+                break;
+
+            case MSG_ID_HD_SYRINGE_PUMP_SYRINGE_DETECT_OVERRIDE:
+                handleTestSyringePumpMeasuredSyringeDetectOverrideRequest( message );
+                break;
+
+            case MSG_ID_HD_SYRINGE_PUMP_MEASURED_HOME_OVERRIDE:
+                handleTestSyringePumpMeasuredHomeOverrideRequest( message );
+                break;
+
+            case MSG_ID_HD_SYRINGE_PUMP_MEASURED_POSITION_OVERRIDE:
+                handleTestSyringePumpMeasuredPositionOverrideRequest( message );
+                break;
+
+            case MSG_ID_HD_SYRINGE_PUMP_MEASURED_VOLUME_OVERRIDE:
+                handleTestSyringePumpMeasuredVolumeOverrideRequest( message );
+                break;
+
             default:
-                // TODO - unrecognized message ID received - ignore
+                // Unrecognized message ID received - ignore
                 break;
         }
     }