Index: firmware/App/Services/DDInterface.c
===================================================================
diff -u -r959f16a2530e68b517cbb5c12c430d5aef4c5f9d -r6f02ff4686ec9dfc60247e9ed3fc9c5cc7771543
--- firmware/App/Services/DDInterface.c	(.../DDInterface.c)	(revision 959f16a2530e68b517cbb5c12c430d5aef4c5f9d)
+++ firmware/App/Services/DDInterface.c	(.../DDInterface.c)	(revision 6f02ff4686ec9dfc60247e9ed3fc9c5cc7771543)
@@ -1,25 +1,25 @@
 /**************************************************************************
 *
-* Copyright (c) 2024-2024 Diality Inc. - All Rights Reserved.
+* Copyright (c) 2024-2026 Diality Inc. - All Rights Reserved.
 *
 * THIS CODE MAY NOT BE COPIED OR REPRODUCED IN ANY FORM, IN PART OR IN
 * WHOLE, WITHOUT THE EXPLICIT PERMISSION OF THE COPYRIGHT OWNER.
 *
 * @file    DDInterface.c
 *
-* @author  (last)      Sean
-* @date    (last)      30-Jul-2024
+* @author  (last)      Varshini Nagabooshanam
+* @date    (last)      26-Jan-2026
 *
-* @author  (original)  Sean
-* @date    (original)  30-Jul-2024
+* @author  (original)  Sean Nash
+* @date    (original)  01-Aug-2024
 *
 ***************************************************************************/
 
 #include "DDInterface.h"
 #include "MessagePayloads.h"
 #include "Messaging.h"
 #include "ModeInitPOST.h"
-#include "OperationModes.h"
+#include "OperationModes.h"
 #include "PersistentAlarm.h"
 #include "SystemCommTD.h"
 #include "TaskGeneral.h"
@@ -36,12 +36,12 @@
 
 // ********** private data **********
 
-// DD status
-static DD_OP_MODE_T ddCurrentOpMode;                                        ///< Current DD operation mode.
+// DD status
+static DD_OP_MODE_T ddCurrentOpMode;                                        ///< Current DD operation mode.
 static U32 ddSubMode;                                                       ///< Current state (sub-mode) of current DD operation mode.
 static F32 dialysatePressure;                                               ///< Current dialysate pressure reported by DD.
-static BOOL ddStartCommandSent;                                             ///< Flag indicates command to start DD has been sent.
-static BOOL ddStarted;                                                      ///< Flag indicates whether we have commanded the DD to start or stop.
+static BOOL ddStartCommandSent;                                             ///< Flag indicates command to start DD has been sent.
+static BOOL ddStarted;                                                      ///< Flag indicates whether we have commanded the DD to start or stop.
 
 static BOOL ddOpModeDataFreshFlag;                                          ///< Flag to signal the handleDDOpMode() to process fresh dd op mode data.
 static BOOL ddDialysatePressureFreshFlag;                                   ///< Flag to signal
@@ -258,20 +258,22 @@
 BOOL setDialysatePressure( MESSAGE_T *message )
 {
     BOOL result = FALSE;
-    DD_PRESSURE_TEMP_DATA_T payload;
+    DD_PRESSURE_DATA_T payload;
 
     // parse message payload
-    memcpy( &payload, &message->payload[ 0 ], sizeof( DD_PRESSURE_TEMP_DATA_T ) );
+    memcpy( &payload, &message->payload[ 0 ], sizeof( DD_PRESSURE_DATA_T ) );
 
-    if ( message->hdr.payloadLen == sizeof( DD_PRESSURE_TEMP_DATA_T ) )
+    if ( message->hdr.payloadLen == sizeof( DD_PRESSURE_DATA_T ) )
     {
         // update dialysate pressure
         dialysatePressure = payload.d41Pressure;
         result = TRUE;
     }
     else
     {
+#ifndef TEST_UI_ONLY
         SET_ALARM_WITH_2_U32_DATA( ALARM_ID_TD_SOFTWARE_FAULT, SW_FAULT_ID_INVALID_DD_PRESSURE_DATA, (U32)message->hdr.payloadLen );
+#endif
     }
 
     ddDialysatePressureFreshFlag = TRUE;
@@ -305,7 +307,9 @@
     dialysateDeliveryCmdSet.acidType       = (U32)acid;
     dialysateDeliveryCmdSet.bicarbType     = (U32)bicarb;
 
+#ifndef TEST_UI_ONLY
     sendMessage( MSG_ID_DD_GEN_DIALYSATE_REQUEST_DATA, COMM_BUFFER_OUT_CAN_TD_2_DD, (U08*)(&dialysateDeliveryCmdSet), sizeof( DIALYSATE_DELIVERY_REQ_PAYLOAD_T ) );
+#endif
     ddStartCommandSent = TRUE;
 }
 
@@ -324,7 +328,9 @@
     if ( TRUE == dialysateDeliveryCmdSet.start )
     {
         dialysateDeliveryCmdSet.dialRate = qd;
+#ifndef TEST_UI_ONLY
         sendMessage( MSG_ID_DD_GEN_DIALYSATE_REQUEST_DATA, COMM_BUFFER_OUT_CAN_TD_2_DD, (U08*)(&dialysateDeliveryCmdSet), sizeof( DIALYSATE_DELIVERY_REQ_PAYLOAD_T ) );
+#endif
     }
     else
     {
@@ -347,7 +353,9 @@
     if ( TRUE == dialysateDeliveryCmdSet.start )
     {
         dialysateDeliveryCmdSet.ufRate = quf;
+#ifndef TEST_UI_ONLY
         sendMessage( MSG_ID_DD_GEN_DIALYSATE_REQUEST_DATA, COMM_BUFFER_OUT_CAN_TD_2_DD, (U08*)(&dialysateDeliveryCmdSet), sizeof( DIALYSATE_DELIVERY_REQ_PAYLOAD_T ) );
+#endif
     }
     else
     {
@@ -371,7 +379,9 @@
     if ( TRUE == dialysateDeliveryCmdSet.start )
     {
         dialysateDeliveryCmdSet.bypassDialyzer = bypass;
+#ifndef TEST_UI_ONLY
         sendMessage( MSG_ID_DD_GEN_DIALYSATE_REQUEST_DATA, COMM_BUFFER_OUT_CAN_TD_2_DD, (U08*)(&dialysateDeliveryCmdSet), sizeof( DIALYSATE_DELIVERY_REQ_PAYLOAD_T ) );
+#endif
     }
     else
     {
@@ -393,7 +403,9 @@
     memset( &dialysateDeliveryCmdSet, 0, sizeof( DIALYSATE_DELIVERY_REQ_PAYLOAD_T ) );
     dialysateDeliveryCmdSet.start = FALSE;
 
+#ifndef TEST_UI_ONLY
     sendMessage( MSG_ID_DD_GEN_DIALYSATE_REQUEST_DATA, COMM_BUFFER_OUT_CAN_TD_2_DD, (U08*)(&dialysateDeliveryCmdSet), sizeof( DIALYSATE_DELIVERY_REQ_PAYLOAD_T ) );
+#endif
 }
 
 /*********************************************************************//**