Index: firmware/App/Modes/ModePreTreat.c
===================================================================
diff -u -rd835a7b8b0ad94f86edebe04e481ea6a4e7035eb -r28f137017915af37b784c95803b044136fab4d5b
--- firmware/App/Modes/ModePreTreat.c	(.../ModePreTreat.c)	(revision d835a7b8b0ad94f86edebe04e481ea6a4e7035eb)
+++ firmware/App/Modes/ModePreTreat.c	(.../ModePreTreat.c)	(revision 28f137017915af37b784c95803b044136fab4d5b)
@@ -25,6 +25,7 @@
 #include "OperationModes.h"
 #include "StatePreTxRecirculate.h"
 #include "SyringePump.h"
+#include "TaskGeneral.h"
 #include "Timers.h"
 #include "TubeSetInstall.h"
 #include "TxParams.h"
@@ -36,12 +37,18 @@
  *  @{
  */
 
+// ********** private definitions **********
+
+/// Interval (ms/task time) at which the Pre-Treatment state data is published on the CAN bus.
+#define PRE_TREATMENT_STATE_DATA_PUB_INTERVAL    ( MS_PER_SECOND / TASK_GENERAL_INTERVAL )
+
 // ********** private data **********
 
 static TD_PRE_TREATMENT_MODE_STATE_T currentPreTreatmentState;              ///< Current Pre-Treatment sub-state
 static BOOL goToInstallStateRequested;                                      ///< Flag indicating a request to transition to Install state.
 static BOOL continueFromRecirculateRequested;                               ///< Flag indicating a request to transition to Patient Connection state.
 static BOOL treatmentStartRequested;                                        ///< Flag indicating the UI requested treatment start.
+static U32 preTreatmentStateBroadcastTimerCtr;                              ///< Pre-Treatment state data broadcast timer counter used to schedule when to transmit data.
 
 // ********** private function prototypes **********
 
@@ -52,6 +59,7 @@
 static TD_PRE_TREATMENT_MODE_STATE_T handleRecirculateState( void );            ///< Handle Recirculate state during Pre-Treatment
 static TD_PRE_TREATMENT_MODE_STATE_T handleRxState( void );                     ///< Handle Confirm Rx state during Pre-Treatment
 static TD_PRE_TREATMENT_MODE_STATE_T handlePatientConnectionState( void );      ///< Handle Patient Connection state during Pre-Treatment
+static void publishPreTreatmentStates( void );                                  ///< Publish Pre-Treatment states to the UI.
 
 /*********************************************************************//**
 * @brief
@@ -69,6 +77,7 @@
     goToInstallStateRequested = FALSE;
     continueFromRecirculateRequested = FALSE;
     treatmentStartRequested = FALSE;
+    preTreatmentStateBroadcastTimerCtr = PRE_TREATMENT_STATE_DATA_PUB_INTERVAL;
 }
 
 /*********************************************************************//**
@@ -152,6 +161,7 @@
         setPreTreatStateTransition();
     }
 
+    publishPreTreatmentStates();
     return (U32)currentPreTreatmentState;
 }
 
@@ -486,4 +496,37 @@
     }
 }
 
+/*********************************************************************//**
+ * @brief
+ * The publishPreTreatmentStates function publishes the current
+ * Pre-Treatment state and associated sub-state data to the UI.
+ * @details \b Inputs: currentPreTreatmentState,
+ * preTreatmentStateBroadcastTimerCtr.
+ * @details \b Outputs: preTreatmentStateBroadcastTimerCtr.
+ * @return none
+ *************************************************************************/
+static void publishPreTreatmentStates( void )
+{
+    if ( ++preTreatmentStateBroadcastTimerCtr >= PRE_TREATMENT_STATE_DATA_PUB_INTERVAL )
+    {
+        PRE_TREATMENT_STATES_DATA_PAYLOAD_T payload = { 0 };
+
+        preTreatmentStateBroadcastTimerCtr = 0;
+
+        payload.mSubMode = (U32)currentPreTreatmentState;
+        payload.mInstallState = (U32)getTubeSetInstallState();
+        payload.mSelfTestDryState = 0;
+        payload.mPrimeState = 0;
+        payload.mRecirculateState = getPreTxRecirculateState();
+        payload.mConfirmRxState = 0;
+        payload.mHeparinState = 0;
+        payload.mPatientConnectionState = 0;
+
+        broadcastData( MSG_ID_TD_PRE_TREATMENT_STATES_DATA,
+                       COMM_BUFFER_OUT_CAN_TD_BROADCAST,
+                       (U08 *)&payload,
+                       sizeof( PRE_TREATMENT_STATES_DATA_PAYLOAD_T ) );
+    }
+}
+
 /**@}*/