big refacting of communitation architect

opencv-motion-detect/evdaemon.cpp

@@ -79,9 +79,11 @@ class EvDaemon{
         json diff = json::diff(this->config, jret["data"]);
         // TODO
         spdlog::info("evdaemon {} config diff: {}", devSn, diff.dump(4));
+
         if(diff.size() == 0) {
             return 0;
         }
+        
         // apply config
         try{
             if(jret["code"] != 0) {