Index: firmware/App/Services/SystemCommMessages.c
===================================================================
diff -u -rc75eec67d9af099ca27555bb9dd8d7187d9a0169 -rbf484bf7b9c8a964582061328d8cbfb773927c38
--- firmware/App/Services/SystemCommMessages.c	(.../SystemCommMessages.c)	(revision c75eec67d9af099ca27555bb9dd8d7187d9a0169)
+++ firmware/App/Services/SystemCommMessages.c	(.../SystemCommMessages.c)	(revision bf484bf7b9c8a964582061328d8cbfb773927c38)
@@ -8,7 +8,7 @@
 * @file    SystemCommMessages.c
 *
 * @author  (last)      Dara Navaei
-* @date    (last)      10-May-2024
+* @date    (last)      27-Aug-2024
 *
 * @author  (original)  Dara Navaei
 * @date    (original)  05-Nov-2019
@@ -1829,6 +1829,7 @@
     MESSAGE_T msg;
     DG_HEAT_DISINFECTION_MODE_CMD_T cmd;
 
+    // Start command
     cmd.start = start;
 
     // Create a message record
@@ -3439,16 +3440,26 @@
 void handleHDUsageInfoRequest( MESSAGE_T *message )
 {
     MESSAGE_T msg;
-    U32 payload = 0; // TODO update this one implemented
+    HD_USAGE_INFO_RECORD_T usageRecord;
     U08 *payloadPtr = msg.payload;
 
+    getNVRecord2Driver( GET_USAGE_RECORD, (U08*)&usageRecord, sizeof( HD_USAGE_INFO_RECORD_T ), 0, ALARM_ID_NO_ALARM );
+
     // Create a message record
     blankMessage( &msg );
-    msg.hdr.msgID = MSG_ID_HD_USAGE_DATA;
-    msg.hdr.payloadLen = sizeof( U32 );
+    msg.hdr.msgID      = MSG_ID_HD_USAGE_DATA;
+    msg.hdr.payloadLen = sizeof( HD_USAGE_INFO_RECORD_T );
 
     // Fill message payload
-    memcpy( payloadPtr, &payload, sizeof( U32 ) );
+    memcpy( payloadPtr, &usageRecord.txTimeTotalHrs, sizeof( F32 ) );
+    payloadPtr += sizeof( F32 );
+    memcpy( payloadPtr, &usageRecord.txTimeSinceLastSrvcHrs, sizeof( F32 ) );
+    payloadPtr += sizeof( F32 );
+    memcpy( payloadPtr, &usageRecord.txLastStartTimeEpoch, sizeof( U32 ) );
+    payloadPtr += sizeof( U32 );
+    memcpy( payloadPtr, &usageRecord.lastResetTimeEpoch, sizeof( U32 ) );
+    payloadPtr += sizeof( U32 );
+    memcpy( payloadPtr, 0, sizeof( U16 ) ); // The UI has exceptionally been set to get the CRC as well. A 0 is sent to satisfy the CRC length.
 
     // Serialize the message (w/ sync, CRC, and appropriate CAN padding) and add serialized message data to appropriate comm buffer
     serializeMessage( msg, COMM_BUFFER_OUT_CAN_HD_2_UI, ACK_REQUIRED );
@@ -3729,7 +3740,7 @@
  * request to start or stop nocturnal heat disinfect.
  * @details Inputs: none
  * @details Outputs: none
- * @param message a pointer to the message to handle
+ * @param start TRUE indicates start heat disinfect mode
  * @return none
  *************************************************************************/
 BOOL sendDGStartHeatDisinfectPassiveCoolModeCommand( BOOL start )
@@ -3738,6 +3749,7 @@
     MESSAGE_T msg;
     DG_HEAT_DISINFECTION_MODE_CMD_T cmd;
 
+    // Start command
     cmd.start = start;
 
     // Create a message record