Index: DDDefs.h
===================================================================
diff -u -rf23a62567aa86da41eb79ee8fdd97d8e58c92beb -rc3be414784df4406b4eacbb565e2d8d5d097eca8
--- DDDefs.h	(.../DDDefs.h)	(revision f23a62567aa86da41eb79ee8fdd97d8e58c92beb)
+++ DDDefs.h	(.../DDDefs.h)	(revision c3be414784df4406b4eacbb565e2d8d5d097eca8)
@@ -7,8 +7,8 @@
 *
 * @file    DDDefs.h
 *
-* @author  (last)      Santhosh Reddy
-* @date    (last)      30-Jul-2026
+* @author  (last)      suresh
+* @date    (last)      18-Aug-2026
 *
 * @author  (original)  Sean Nash
 * @date    (original)  01-Aug-2024
@@ -197,6 +197,8 @@
     DD_GEND_SPENT_CHAMBER_FILL_STATE,                           ///< Gen dialysate - spent chamber fill state
     DD_GEND_BICARB_CHAMBER_FILL_STATE,                          ///< Gen dialysate - bicarb chamber fill state
     DD_GEND_DIALYSATE_DELIVERY_PAUSE,                           ///< Gen dialysate - dialysate delivery pause state
+    DD_GEND_SPENT_CHAMBER_VALV_OPEN_STATE,                      ///< Gen dialysate - spent chamber vent open state
+    DD_GEND_PRIME_FLUID_DISCARD_STATE,                          ///< Gen dialysate - prime fluid discard state
     NUM_OF_DD_GEND_MODE_STATES                                  ///< Number of gen dialysate states
 };
 typedef enum DD_GenD_Mode_States DD_GEND_MODE_STATE_T;          ///< Type for DD gen dialysate mode states enumeration
@@ -297,10 +299,10 @@
 /// Enumeration of available DD commands.
 enum DD_Command
 {
-    DD_CMD_NONE = 0,                           ///< Not a command
-    NUM_OF_DD_COMMANDS                         ///< Number of DD commands
+    DD_CMD_NONE = 0,                                ///< Not a command
+    NUM_OF_DD_COMMANDS                              ///< Number of DD commands
 };
-typedef enum DD_Command DD_COMMAND_T;          ///< Type for DD commands enumeration
+typedef enum DD_Command DD_COMMAND_T;               ///< Type for DD commands enumeration
 
 /// Enumeration of general commands to DD sub-system.
 enum DD_General_Commands
@@ -448,6 +450,9 @@
     P37_VALV,                                     ///< Valve (P37)
     P39_VALV,                                     ///< Valve (P39)
     P6_VALV,                                      ///< Valve (P6)
+    P3_VALV,                                      ///< Valve (P3)
+    P43_VALV,                                     ///< Valve (P43)
+    P48_VALV,                                     ///< Valve (P48)
     LAST_FP_VALVE = P6_VALV,                      ///< Last FP valve
     DD_NUM_OF_VALVES                              ///< Number of DD valves
 };
@@ -596,4 +601,73 @@
 typedef enum Conductivity_Sensors CONDUCTIVITY_SENSORS_T; ///< Type for conductivity sensor enumeration.
 /**@}*/
 
+/**
+ *  @addtogroup PressureSensor
+ *  @{
+ */
+
+/// Enumeration of pressure sensors monitored by this module.
+typedef enum PressureSensors
+{
+    D9_PRES = 0,                                ///< Hydraulics outlet pressure (PHo/Pn)
+    FIRST_DD_PRESSURE_SENSOR = D9_PRES,         ///< Start of DD pressure sensor group
+    D66_PRES,                                   ///< Dry Bicarb pressure (PDB/PCb)
+    D51_PRES,                                   ///< Spent Dialysate pressure (PDs)
+    D18_PRES,                                   ///< Fresh Dialysate pressure (PDf)
+    D41_PRES,                                   ///< Transmembrane pressure (Ptm)
+    D87_PRES,                                   ///< Dialysate pressure
+    LAST_DD_PRESSURE_SENSOR = D87_PRES,         ///< End of DD pressure sensor group
+    M3_PRES,                                    ///< Water inlet pressure after regulator (PR0)
+    FIRST_IO_PRESSURE_SENSOR = M3_PRES,         ///< Start of IO pressure sensor group
+    LAST_IO_PRESSURE_SENSOR = M3_PRES,          ///< End of IO pressure sensor group
+    P8_PRES,                                    ///< Water inlet pressure before conductivity sensor
+    FIRST_FP_PRESSURE_SENSOR = P8_PRES,         ///< Start of FP pressure sensor group
+    P13_PRES,                                   ///< Pressure before RO filter
+    P17_PRES,                                   ///< Pressure after RO filter
+    P46_PRES,                                   ///< Pressure after sediment filter
+    LAST_FP_PRESSURE_SENSOR = P46_PRES,         ///< End of FP pressure sensor group
+    NUM_OF_PRESSURE_SENSORS                     ///< Number of pressure sensors
+} PRESSURE_SENSORS_T;
+
+/**@}*/
+
+/**
+ *  @addtogroup TemperatureSensors
+ *  @{
+ */
+
+/// Enumeration of temperature sensors.
+typedef enum TemperatureSensors
+{
+    D1_TEMP = 0,                                ///< First temp sensor to scan
+    TEMPSENSORS_FIRST = D1_TEMP,                ///< Heat exchanger Inlet temperature sensor
+    D78_TEMP,                                   ///< Heat exchanger Outlet temperature sensor
+    D4_TEMP,                                    ///< Hydraulics primary heater temperature sensor
+    D50_TEMP,                                   ///< Trimmer heater temperature sensor
+    D99_TEMP,                                   ///< Temperature sensor
+    BRD_TEMP,                                   ///< DD board temperature sensor ( thermistor )
+    NUM_OF_TEMPERATURE_SENSORS                  ///< Number of temperature sensors
+} TEMPERATURE_SENSORS_T;
+
+/**@}*/
+
+/**@}*/
+
+/**
+ *  @addtogroup ConcentratePumps
+ *  @{
+ */
+
+/// Enumeration of concentrate pumps.
+typedef enum ConcentratePumps
+{
+    D11_PUMP = 0,                                                   ///< Acid concentrate pump
+    CONCENTRATEPUMPS_FIRST = D11_PUMP,                              ///< First concentrate pump in list
+    D10_PUMP,                                                       ///< Bicarbonate concentrate pump
+    D76_PUMP,                                                       ///< ultrafiltration pump
+    NUM_OF_CONCENTRATE_PUMPS                                        ///< Number of concentrate pumps
+} CONCENTRATE_PUMPS_T;
+
+/**@}*/
+
 #endif