Index: firmware/App/Services/SystemCommMessages.c
===================================================================
diff -u -raa1367aa813db6acc52013795a8c6e58405bb10e -rb607a94701f5844f2e850783239d1cb2df87fcd5
--- firmware/App/Services/SystemCommMessages.c	(.../SystemCommMessages.c)	(revision aa1367aa813db6acc52013795a8c6e58405bb10e)
+++ firmware/App/Services/SystemCommMessages.c	(.../SystemCommMessages.c)	(revision b607a94701f5844f2e850783239d1cb2df87fcd5)
@@ -8,7 +8,7 @@
 * @file    SystemCommMessages.c
 *
 * @author  (last)      Michael Garthwaite
-* @date    (last)      15-Aug-2023
+* @date    (last)      21-Aug-2023
 *
 * @author  (original)  Dara Navaei
 * @date    (original)  05-Nov-2019
@@ -5012,4 +5012,36 @@
     sendTestAckResponseMsg( (MSG_ID_T)message->hdr.msgID, result );
 }
 
+/*********************************************************************//**
+ * @brief
+ * The handleTestDGReservoirOverrideRequest function handles a request
+ * to override the reservoir publish interval
+ * @details Inputs: none
+ * @details Outputs: message handled
+ * @param message a pointer to the message to handle
+ * @return none
+ *************************************************************************/
+void handleTestDGReservoirOverrideRequest( MESSAGE_T * message )
+{
+    TEST_OVERRIDE_PAYLOAD_T payload;
+    BOOL result = FALSE;
+
+    // verify payload length
+    if ( sizeof( TEST_OVERRIDE_PAYLOAD_T ) == message->hdr.payloadLen )
+    {
+        memcpy( &payload, message->payload, sizeof( TEST_OVERRIDE_PAYLOAD_T ) );
+        if ( FALSE == payload.reset )
+        {
+            result = testSetReservoirDataPublishIntervalOverride( payload.state.u32 );
+        }
+        else
+        {
+            result = testResetReservoirDataPublishIntervalOverride();
+        }
+    }
+
+    // respond to request
+    sendTestAckResponseMsg( (MSG_ID_T)message->hdr.msgID, result );
+}
+
 /**@}*/