Only care for other IDs than ourself.

coupler/opc-ua-server/keep_alive_subscriber.h

@@ -57,6 +57,7 @@ static void dataChangeNotificationCallback(UA_Server *server, UA_UInt32 monitore
         // split <ID>.<heart_beats>, just converting to int is enough
 	coupler_id = (int) heart_beat;
         UA_LOG_INFO(UA_Log_Stdout, UA_LOGCATEGORY_USERLAND, "heart_beat = %f, id=%d", heart_beat, coupler_id);
+        if (coupler_id!=COUPLER_ID) {
 	  // convert coupler_id to str
           char* coupler_id_str = convertInt2Str(coupler_id);
 
@@ -66,6 +67,7 @@ static void dataChangeNotificationCallback(UA_Server *server, UA_UInt32 monitore
           // Add to our local linked list
           addItem(&SUBSCRIBER_DICT, coupler_id_str, milli_seconds_now_str);
 	}
+    }
 }
 
 /* Add new connection to the server */