Index: firmware/App/Services/SystemCommMessages.c
===================================================================
diff -u -r0b87f7e6142dc3710db5c32a0c7c6694343dd717 -r1017bbc5760a50e20357da1e4f705b3e6157375e
--- firmware/App/Services/SystemCommMessages.c	(.../SystemCommMessages.c)	(revision 0b87f7e6142dc3710db5c32a0c7c6694343dd717)
+++ firmware/App/Services/SystemCommMessages.c	(.../SystemCommMessages.c)	(revision 1017bbc5760a50e20357da1e4f705b3e6157375e)
@@ -641,6 +641,36 @@
 
 /*************************************************************************
  * @brief
+ * The sendDGStartStopTrimmerHeaterCommand function constructs a DG start/stop \n
+ * trimmer heater command message and queues the msg for transmit on the \n
+ * appropriate CAN channel.
+ * @details
+ * Inputs : none
+ * Outputs : DG start/stop trimmer heater command msg constructed and queued.
+ * @param start : TRUE indicates start heater, FALSE indicates stop heater.
+ * @return TRUE if msg successfully queued for transmit, FALSE if not
+ *************************************************************************/
+BOOL sendDGStartStopTrimmerHeaterCommand( BOOL start )
+{
+    BOOL result;
+    MESSAGE_T msg;
+    U08 *payloadPtr = msg.payload;
+
+    // create a message record
+    blankMessage( &msg );
+    msg.hdr.msgID = MSG_ID_DG_START_STOP_TRIMMER_HEATER_CMD;
+    msg.hdr.payloadLen = sizeof( BOOL );
+
+    memcpy( payloadPtr, &start, sizeof( BOOL ) );
+
+    // serialize the message (w/ sync, CRC, and appropriate CAN padding) and add serialized message data to appropriate comm buffer
+    result = serializeMessage( msg, COMM_BUFFER_OUT_CAN_HD_2_DG, ACK_REQUIRED );
+
+    return result;
+}
+
+/*************************************************************************
+ * @brief
  * The sendDGSampleWaterCommand function constructs a DG sample water command \n
  * message and queues the msg for transmit on the appropriate CAN channel.
  * @details
@@ -1430,18 +1460,21 @@
     MESSAGE_T msg;
     U08 major = (U08)HD_VERSION_MAJOR;
     U08 minor = (U08)HD_VERSION_MINOR;
+    U08 micro = (U08)HD_VERSION_MICRO;
     U16 build = (U16)HD_VERSION_BUILD;
     U08 *payloadPtr = msg.payload;
 
     // create a message record
     blankMessage( &msg );
     msg.hdr.msgID = MSG_ID_HD_VERSION;
-    msg.hdr.payloadLen = sizeof( U08 ) + sizeof( U08 ) + sizeof( U16 );
+    msg.hdr.payloadLen = sizeof( U08 ) + sizeof( U08 ) + sizeof( U08 ) + sizeof( U16 );
 
     memcpy( payloadPtr, &major, sizeof( U08 ) );
     payloadPtr += sizeof( U08 );
     memcpy( payloadPtr, &minor, sizeof( U08 ) );
     payloadPtr += sizeof( U08 );
+    memcpy( payloadPtr, &micro, sizeof( U08 ) );
+    payloadPtr += sizeof( U08 );
     memcpy( payloadPtr, &build, sizeof( U16 ) );
 
     // serialize the message (w/ sync, CRC, and appropriate CAN padding) and add serialized message data to appropriate comm buffer