diff --git a/extra_script.py b/extra_script.py
index 7947b0f..5838f24 100644
--- a/extra_script.py
+++ b/extra_script.py
@@ -132,7 +132,7 @@ def generateCfg(inFile,outFile,addDirs=[]):
                 raise Exception("%s: config names must be max 15 caracters"%n)
             data+='  const String %s=F("%s");\n'%(n,n)
         data+='  protected:\n'    
-        data+='  GwConfigItem *configs[%d]={\n'%(l)
+        data+='  GwConfigInterface *configs[%d]={\n'%(l)
         first=True
         for item in config:
             if not first:
@@ -141,7 +141,7 @@ def generateCfg(inFile,outFile,addDirs=[]):
             secret="false";
             if item.get('type') == 'password':
                 secret="true"   
-            data+="    new GwConfigItem(%s,\"%s\",%s)"%(item.get('name'),item.get('default'),secret)
+            data+="    new GwConfigInterface(%s,\"%s\",%s)"%(item.get('name'),item.get('default'),secret)
         data+='};\n'  
         data+='};\n'
     writeFileIfChanged(outFile,data)    
diff --git a/lib/config/GWConfig.cpp b/lib/config/GWConfig.cpp
index 7fe451e..c6b4af8 100644
--- a/lib/config/GWConfig.cpp
+++ b/lib/config/GWConfig.cpp
@@ -8,13 +8,9 @@ bool isTrue(const char * value){
     return (strcasecmp(value,"true") == 0);
 }
 
-class DummyConfig : public GwConfigItem{
+class DummyConfig : public GwConfigInterface{
     public:
-        DummyConfig():GwConfigItem("dummy",""){}
-        virtual void fromString(const String v){
-        };
-        virtual void reset(){
-        }
+        DummyConfig():GwConfigInterface("dummy",""){}
 };
 
 DummyConfig dummyConfig;
@@ -46,13 +42,7 @@ String GwConfigHandler::toJson() const{
     logger->logString("configJson: %s",rt.c_str());
     return rt;
 }
-GwConfigItem * GwConfigHandler::findConfig(const String name, bool dummy){
-    for (int i=0;i<getNumConfig();i++){
-        if (configs[i]->getName() == name) return configs[i];
-    }
-    if (!dummy) return NULL;
-    return &dummyConfig;
-}
+
 GwConfigInterface * GwConfigHandler::getConfigItem(const String name, bool dummy) const{
     for (int i=0;i<getNumConfig();i++){
         if (configs[i]->getName() == name) return configs[i];
@@ -68,7 +58,7 @@ bool GwConfigHandler::loadConfig(){
     prefs.begin(PREF_NAME,true);
     for (int i=0;i<getNumConfig();i++){
         String v=prefs.getString(configs[i]->getName().c_str(),configs[i]->getDefault());
-        configs[i]->fromString(v);
+        configs[i]->value=v;
     }
     prefs.end();
     return true;
@@ -76,8 +66,13 @@ bool GwConfigHandler::loadConfig(){
 bool GwConfigHandler::saveConfig(){
     prefs.begin(PREF_NAME,false);
     for (int i=0;i<getNumConfig();i++){
-        logger->logString("saving %s=%s",configs[i]->getName().c_str(),configs[i]->asCString());
-        prefs.putString(configs[i]->getName().c_str(),configs[i]->asString());
+        String val=configs[i]->asString();
+        auto it=changedValues.find(configs[i]->getName());
+        if (it != changedValues.end()){
+            val=it->second;
+        }
+        logger->logString("saving %s=%s",configs[i]->getName().c_str(),val.c_str());
+        prefs.putString(configs[i]->getName().c_str(),val);
     }
     prefs.end();
     logger->logString("saved config");
@@ -85,21 +80,21 @@ bool GwConfigHandler::saveConfig(){
 }
 
 bool GwConfigHandler::updateValue(String name, String value){
-    GwConfigItem *i=findConfig(name);
+    GwConfigInterface *i=getConfigItem(name);
     if (i == NULL) return false;
     if (i->isSecret() && value.isEmpty()){
         LOG_DEBUG(GwLog::LOG,"skip empty password %s",name.c_str());
     }
     else{
         LOG_DEBUG(GwLog::LOG,"update config %s=>%s",name.c_str(),i->isSecret()?"***":value.c_str());
-        i->fromString(value);
+        changedValues[name]=value;
     }
     return true;
 }
 bool GwConfigHandler::reset(bool save){
     logger->logString("reset config");
     for (int i=0;i<getNumConfig();i++){
-        configs[i]->reset();
+        changedValues[configs[i]->getName()]=configs[i]->getDefault();
     }
     if (!save) return true;
     return saveConfig();
diff --git a/lib/config/GWConfig.h b/lib/config/GWConfig.h
index bf91963..3de56b0 100644
--- a/lib/config/GWConfig.h
+++ b/lib/config/GWConfig.h
@@ -5,12 +5,15 @@
 #include "GwLog.h"
 #include "GwConfigItem.h"
 #include "GwConfigDefinitions.h"
+#include <map>
 
 
 class GwConfigHandler: public GwConfigDefinitions{
     private:
         Preferences prefs;
         GwLog *logger;
+        typedef std::map<String,String> StringMap;
+        StringMap changedValues;
     public:
         public:
         GwConfigHandler(GwLog *logger);
@@ -23,7 +26,6 @@ class GwConfigHandler: public GwConfigDefinitions{
         String getString(const String name,const String defaultv="") const;
         bool getBool(const String name,bool defaultv=false) const ;
         int getInt(const String name,int defaultv=0) const;
-        GwConfigItem * findConfig(const String name, bool dummy=false);
         GwConfigInterface * getConfigItem(const String name, bool dummy=false) const;
     private:
 };
diff --git a/lib/config/GwConfigItem.h b/lib/config/GwConfigItem.h
index a9e24cf..cef920a 100644
--- a/lib/config/GwConfigItem.h
+++ b/lib/config/GwConfigItem.h
@@ -2,22 +2,16 @@
 #define _GWCONFIGITEM_H
 #include "WString.h"
 #include <vector>
+
+class GwConfigHandler;
 class GwConfigInterface{
-    public:
-    virtual String asString() const=0;
-    virtual const char * asCString() const =0;
-    virtual bool asBoolean() const = 0;
-    virtual int asInt() const = 0;
-    virtual bool isSecret() const =0;
-};
-class GwConfigItem: public GwConfigInterface{
     private:
         String name;
         String initialValue;
         String value;
         bool secret=false;
     public:
-        GwConfigItem(const String &name, const String initialValue, bool secret=false){
+        GwConfigInterface(const String &name, const String initialValue, bool secret=false){
             this->name=name;
             this->initialValue=initialValue;
             this->value=initialValue;
@@ -29,9 +23,6 @@ class GwConfigItem: public GwConfigInterface{
         virtual const char * asCString() const{
             return value.c_str();
         };
-        virtual void fromString(const String v){
-            value=v;
-        };
         virtual bool asBoolean() const{
             return strcasecmp(value.c_str(),"true") == 0;
         }
@@ -41,9 +32,6 @@ class GwConfigItem: public GwConfigInterface{
         String getName() const{
             return name;
         }
-        virtual void reset(){
-            value=initialValue;
-        }
         virtual bool isSecret() const{
             return secret;
         }
@@ -53,6 +41,7 @@ class GwConfigItem: public GwConfigInterface{
         String getDefault() const {
             return initialValue;
         }
+        friend class GwConfigHandler;
 };
 
 class GwNmeaFilter{
diff --git a/src/main.cpp b/src/main.cpp
index 2fa0ec9..d2d41c7 100644
--- a/src/main.cpp
+++ b/src/main.cpp
@@ -894,7 +894,8 @@ void setup() {
     GWSYNCHRONIZED(&mainLock);
     userCodeHandler.startUserTasks(MIN_USER_TASK);
   }
-  
+  logger.logDebug(GwLog::ERROR,"wifi AP pass: %s",config.getString(config.apPassword).c_str());
+  logger.logDebug(GwLog::ERROR,"admin pass: %s",config.getString(config.adminPassword).c_str());
   logger.logDebug(GwLog::LOG,"setup done");
 }  
 //*****************************************************************************