Index: firmware/App/Services/Messaging.c
===================================================================
diff -u -r253b31257a3b6877624e8b83ee06c1404c1c3dd5 -r7983907af837390c90979b1ac727f3f55f0b7ae2
--- firmware/App/Services/Messaging.c	(.../Messaging.c)	(revision 253b31257a3b6877624e8b83ee06c1404c1c3dd5)
+++ firmware/App/Services/Messaging.c	(.../Messaging.c)	(revision 7983907af837390c90979b1ac727f3f55f0b7ae2)
@@ -7,8 +7,8 @@
 *
 * @file    Messaging.c
 *
-* @author  (last)      Varshini Nagabooshanam
-* @date    (last)      27-Jan-2026
+* @author  (last)      Michael Garthwaite
+* @date    (last)      10-Feb-2026
 *
 * @author  (original)  Vinayakam Mani
 * @date    (original)  07-Aug-2024
@@ -25,6 +25,7 @@
 #include "Compatible.h"
 #include "ConcentratePumps.h"
 #include "DialysatePumps.h"
+#include "DryBiCart.h"
 #include "Flow.h"
 #include "FlowSensor.h"
 #include "FluidPump.h"
@@ -128,18 +129,21 @@
     { MSG_ID_DD_PRESSURE_SENSOR_PUBLISH_INTERVAL_OVERRIDE_REQUEST,                  &testDDPressureSensorDataPublishIntervalOverride },
     { MSG_ID_DD_PRESSURE_SENSOR_FILTER_READINGS_OVERRIDE_REQUEST,                   &testDDPressureSensorFilteredReadingsOverride },
     { MSG_ID_DD_PRESSURE_SENSOR_FILTER_TEMPERATURE_OVERRIDE_REQUEST,                &testDDPressureSensorFilteredTemperatureReadingsOverride },
-#ifndef __TEENSY_CONDUCTIVITY_DRIVER__
-    { MSG_ID_DD_CONDUCTIVITY_SENSOR_READINGS_OVERRIDE_REQUEST,                      &testDDConductivitySensorReadingsOverride },
-    { MSG_ID_DD_CONDUCTIVITY_SENSOR_TEMPERATURE_OVERRIDE_REQUEST,                   &testDDConductivitySensorTemperatureReadingsOverride },
-    { MSG_ID_DD_CONDUCTIVITY_SENSOR_READ_COUNTER_OVERRIDE_REQUEST,                  &testDDConductivitySensorReadCounterOverride },
-    { MSG_ID_DD_CONDUCTIVITY_SENSOR_ERROR_COUNTER_OVERRIDE_REQUEST,                 &testDDConductivitySensorErrorCounterOverride },
+
     { MSG_ID_DD_CONDUCTIVITY_SENSOR_PUBLISH_INTERVAL_OVERRIDE_REQUEST,              &testDDConductivitySensorDataPublishIntervalOverride },
     { MSG_ID_FP_CONDUCTIVITY_PUBLISH_INTERVAL_OVERRIDE_REQUEST,                     &testFPConductivitySensorDataPublishIntervalOverride },
-    { MSG_ID_FP_CONDUCTIVITY_OVERRIDE_REQUEST,                                      &testFPConductivitySensorReadingsOverride },
-    { MSG_ID_FP_CONDUCTIVITY_TEMP_OVERRIDE_REQUEST,                                 &testFPConductivitySensorTemperatureReadingsOverride },
-    { MSG_ID_FP_CONDUCTIVITY_READ_COUNT_OVERRIDE_REQUEST,                           &testFPConductivitySensorReadCounterOverride },
-    { MSG_ID_FP_CONDUCTIVITY_ERROR_COUNT_OVERRIDE_REQUEST,                          &testFPConductivitySensorErrorCounterOverride },
-#endif
+    { MSG_ID_DD_CONDUCTIVITY_SENSOR_READINGS_OVERRIDE_REQUEST,                      &testConductivitySensorReadingsOverride },
+    { MSG_ID_DD_CONDUCTIVITY_SENSOR_TEMPERATURE_OVERRIDE_REQUEST,                   &testConductivitySensorTemperatureOverride },
+    { MSG_ID_FP_CONDUCTIVITY_SENSOR_READINGS_OVERRIDE_REQUEST,                      &testConductivitySensorReadingsOverride },
+    { MSG_ID_FP_CONDUCTIVITY_SENSOR_TEMPERATURE_OVERRIDE_REQUEST,                   &testConductivitySensorTemperatureOverride },
+    { MSG_ID_DD_SET_CONDUCTIVITY_MODEL_REQUEST,                                     &testSetTeenyConductivityModel },
+    { MSG_ID_DD_CONDUCTIVITY_SENSOR_RESISTANCE_OVERRIDE_REQUEST,                    &testTeensyConductivitySensorResistanceReadingsOverride },
+    { MSG_ID_FP_CONDUCTIVITY_SENSOR_RESISTANCE_OVERRIDE_REQUEST,                    &testTeensyConductivitySensorResistanceReadingsOverride },
+    { MSG_ID_DD_CONDUCTIVITY_SENSOR_CONDUCTIVITY_READ_COUNTER_OVERRIDE_REQUEST,     &testConductivitySensorConductivityReadCounterOverride },
+    { MSG_ID_DD_CONDUCTIVITY_SENSOR_CONDUCTIVITY_ERROR_COUNTER_OVERRIDE_REQUEST,    &testConductivitySensorConductivityErrorCounterOverride },
+    { MSG_ID_FP_CONDUCTIVITY_SENSOR_CONDUCTIVITY_READ_COUNT_OVERRIDE_REQUEST,       &testConductivitySensorConductivityReadCounterOverride },
+    { MSG_ID_FP_CONDUCTIVITY_SENSOR_CONDUCTIVITY_ERROR_COUNT_OVERRIDE_REQUEST,      &testConductivitySensorConductivityErrorCounterOverride },
+
     { MSG_ID_DD_CONCENTRATE_PUMP_PUBLISH_INTERVAL_OVERRIDE_REQUEST,                 &testConcentratePumpDataPublishIntervalOverride },
     { MSG_ID_DD_CONCENTRATE_PUMP_TARGET_SPEED_OVERRIDE_REQUEST,                     &testConcentratePumpTargetSpeedOverride },
     { MSG_ID_DD_CONCENTRATE_PUMP_MEASURED_SPEED_OVERRIDE_REQUEST,                   &testConcentratePumpMeasuredSpeedOverride },
@@ -267,9 +271,12 @@
     { MSG_ID_FP_DEF_PRE_GEN_PUBLISH_INTERVAL_OVERRIDE_REQUEST,                      &testPreGenPermeateDefDataPublishIntervalOverride},
     { MSG_ID_FP_DEF_GEN_PUBLISH_INTERVAL_OVERRIDE_REQUEST,                          &testGenPermeateDefDataPublishIntervalOverride},
     { MSG_ID_FP_DEF_STATUS_REQUEST,                                                 &testGetFPDefeaturedStatus },
-#ifdef __TEENSY_CONDUCTIVITY_DRIVER__
-    { MSG_ID_DD_SET_CONDUCTIVITY_MODEL_REQUEST,                                     &testSetTeenyConductivityModel },
-#endif
+    { MSG_ID_DD_DRY_BICART_DATA_PUBLISH_INTERVAL_OVERRIDE_REQUEST,                  &testDryBiCartDataPublishIntervalOverride },
+    { MSG_ID_DD_DRY_BICART_FILL_CYCLE_MAX_OVERRIDE_REQUEST,                         &testDryBiCartFillCycleMaxCountOverride },
+    { MSG_ID_DD_DRY_BICART_FILL_REQUEST_OVERRIDE_REQUEST,                           &testDryBiCartFillRequestOverride },
+    { MSG_ID_FP_RO_FILTERED_REJECTION_RATIO_OVERRIDE_REQUEST,                       &testRORejectionRatioFilteredOverride },
+    { MSG_ID_DD_BICART_DRAIN_REQUEST_OVERRIDE_REQUEST,                              &testDryBiCartDrainRequestOverride },
+    { MSG_ID_DD_BICART_CARTRIDGE_SELECT_OVERRIDE_REQUEST,                           &testDryBiCartTypeOverride },
 };
 
 /// Calculation for number of entries in the incoming message function handler look-up table.
@@ -749,6 +756,7 @@
     return result;
 }
 
+
 /*************************************************************************
  *                       TEST SUPPORT FUNCTIONS
  *************************************************************************/