diff --git a/esp3d/src/core/espcmd/ESP400.cpp b/esp3d/src/core/espcmd/ESP400.cpp
index 7fa15d6d..a4ec269f 100644
--- a/esp3d/src/core/espcmd/ESP400.cpp
+++ b/esp3d/src/core/espcmd/ESP400.cpp
@@ -376,7 +376,7 @@ bool Commands::ESP400(const char* cmd_params, level_authenticate_type auth_type,
     output->print (",{\"F\":\"service\",\"F2\":\"notification\",\"P\":\"");
     output->print (ESP_NOTIFICATION_SETTINGS);
     output->print ("\",\"T\":\"S\",\"V\":\"");
-    output->print (Settings_ESP3D::read_string(ESP_NOTIFICATION_SETTINGS));
+    output->print ((strlen(Settings_ESP3D::read_string(ESP_NOTIFICATION_SETTINGS))==0)?" ":Settings_ESP3D::read_string(ESP_NOTIFICATION_SETTINGS));
     output->print ("\",\"S\":\"");
     output->print (Settings_ESP3D::get_max_string_size(ESP_NOTIFICATION_SETTINGS));
     output->print ("\",\"H\":\"ts\",\"M\":\"");
diff --git a/esp3d/src/core/espcmd/ESP401.cpp b/esp3d/src/core/espcmd/ESP401.cpp
index 69fea6d5..3c512dbf 100644
--- a/esp3d/src/core/espcmd/ESP401.cpp
+++ b/esp3d/src/core/espcmd/ESP401.cpp
@@ -166,12 +166,12 @@ bool Commands::ESP401(const char* cmd_params, level_authenticate_type auth_type,
 #endif //WIFI_FEATURE
     }
     if (!response) {
-        String tmp = "error " + spos;
-        output->printERROR (tmp);
+        parameter = "error " + spos;
+        output->printERROR (parameter.c_str());
 
     } else {
-        String tmp = "ok " + spos;
-        output->printMSG(tmp)
+        parameter = "ok " + spos;
+        output->printMSG(parameter.c_str());
     }
 
     return response;