Index: firmware/App/Services/SystemCommMessages.c
===================================================================
diff -u -r686acb428a08c632526ca35c8a0102ab22836bd0 -r0565c9c592a8b78978157e805269f5900f9636ce
--- firmware/App/Services/SystemCommMessages.c	(.../SystemCommMessages.c)	(revision 686acb428a08c632526ca35c8a0102ab22836bd0)
+++ firmware/App/Services/SystemCommMessages.c	(.../SystemCommMessages.c)	(revision 0565c9c592a8b78978157e805269f5900f9636ce)
@@ -8,7 +8,7 @@
 * @file    SystemCommMessages.c
 *
 * @author  (last)      Dara Navaei
-* @date    (last)      10-Feb-2023
+* @date    (last)      15-Feb-2023
 *
 * @author  (original)  Dara Navaei
 * @date    (original)  05-Nov-2019
@@ -484,7 +484,7 @@
 
     // create a message record
     blankMessage( &msg );
-    msg.hdr.msgID = MSG_ID_DG_VERSION;
+    msg.hdr.msgID = MSG_ID_DG_VERSION_REPONSE;
     msg.hdr.payloadLen = sizeof( DG_VERSIONS_T );
 
     if ( message->hdr.payloadLen == sizeof( U08 ) + sizeof( U08 ) + sizeof( U08 ) + sizeof( U16 ) + sizeof( U32 ) )
@@ -502,7 +502,7 @@
     }
 
     // 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_DG_BROADCAST, ACK_NOT_REQUIRED );
+    serializeMessage( msg, COMM_BUFFER_OUT_CAN_DG_BROADCAST, ACK_REQUIRED );
 }
 
 /*********************************************************************//**
@@ -526,7 +526,7 @@
 
     // Create a message record
     blankMessage( &msg );
-    msg.hdr.msgID = MSG_ID_DG_SERIAL_NUMBER;
+    msg.hdr.msgID = MSG_ID_DG_SERIAL_NUMBER_RESPONSE;
 
     // Add 1 byte for null terminator
     msg.hdr.payloadLen = MAX_TOP_LEVEL_SN_CHARS + 1;
@@ -1676,7 +1676,7 @@
     getCPLDStatus( &payload );
     // create a message record
     blankMessage( &msg );
-    msg.hdr.msgID = MSG_ID_DG_CPLD_STATUS;
+    msg.hdr.msgID = MSG_ID_DG_CPLD_STATUS_DATA;
     msg.hdr.payloadLen = sizeof( CPLD_STATUS_T );
 
     // fill message payload
@@ -4414,11 +4414,6 @@
                 requestNewOperationMode( DG_MODE_HEAT );
                 break;
 
-            case NELSON_POS_CONTROL_CHEM_DISINFECT:
-                setChemNelsonSupportMode( nelson );
-                requestNewOperationMode( DG_MODE_CHEM );
-                break;
-
             case NELSON_POS_CONTROL_HEAT_DISINFECT:
                 setHeatNelsonSupportMode( nelson );
                 requestNewOperationMode( DG_MODE_HEAT );