diff --git a/lighthub/colorchannel.cpp b/lighthub/colorchannel.cpp
index c125c73..272b7e4 100644
--- a/lighthub/colorchannel.cpp
+++ b/lighthub/colorchannel.cpp
@@ -25,6 +25,7 @@ int colorChannel::getDefaultStorageType()
           {
             case 3:
             case 4:
+            case 5:
               return ST_HSV255;
             case 1:
               return ST_PERCENTS255;  
diff --git a/lighthub/config.cpp b/lighthub/config.cpp
index 87e4acf..a801d66 100644
--- a/lighthub/config.cpp
+++ b/lighthub/config.cpp
@@ -1,4 +1,5 @@
 #include "config.h"
+#include "main.h"
 
 String             systemConfig::getMACString()
 {
@@ -28,6 +29,7 @@ bool             systemConfig::isValidSysConf()
                        stream->close();  
                        return false;
                        } 
+    stream->close();                    
     return true;                   
 }; 
 
@@ -289,4 +291,13 @@ bool             systemConfig::getLoadHTTPConfig()
 return false;
 }
 
+ String           systemConfig::getETAG()
+{
+return "123";
+}
 
+bool             systemConfig::setETAG(String etag)
+{
+debugSerial<<F("ETAG:")<<etag<<endl;   
+return 1;
+}
\ No newline at end of file
diff --git a/lighthub/config.h b/lighthub/config.h
index 20d6d40..02e81be 100644
--- a/lighthub/config.h
+++ b/lighthub/config.h
@@ -54,5 +54,8 @@ class systemConfig {
  bool             setSaveSuccedConfig(bool);
  bool             getLoadHTTPConfig();
  bool             setLoadHTTPConfig(bool);
+ String           getETAG();
+ bool             setETAG(String etag); 
+
  //bool             Save();  
 };
\ No newline at end of file
diff --git a/lighthub/flashstream.cpp b/lighthub/flashstream.cpp
index 02ef05c..0a8e022 100644
--- a/lighthub/flashstream.cpp
+++ b/lighthub/flashstream.cpp
@@ -91,7 +91,8 @@ NRFFlashStorage EEPROM;
     int flashStream::available() 
                 { 
                     if (!fs) return 0;
-                    if (textMode && peek()==EOFchar) return 0;  
+                    //if (textMode && (peek()==EOFchar)) {debugSerial<<"X";return 0;}  //Not working for esp8266
+                    if (fs.position()>=streamSize) return 0;
                     return fs.available();  
                 };
                 
@@ -111,8 +112,8 @@ NRFFlashStorage EEPROM;
         debugSerial<<(F(" Res:"))<<res<<endl;
         return res;
       };         
-    void flashStream::close()  {fs.close();  };
-    void flashStream::flush()  {fs.flush();  };
+    void flashStream::close()  {fs.close(); debugSerial<<filename<<"  Closed\n";};
+    void flashStream::flush()  {fs.flush(); debugSerial<<filename<<"  Flushed\n";};
     size_t flashStream::write(uint8_t ch) 
                 {
                     return fs.write(ch);
@@ -162,38 +163,33 @@ NRFFlashStorage EEPROM;
                   else if (_filename == "/config.bin")  return open (FN_CONFIG_BIN,mode);
                   else return 0;    
                 };
-/*
-    virtual int  open(unsigned int _startPos=0, unsigned int _size=4096 char mode='\0') 
-            {
-                pos = 0;
-                startPos = _startPos;
-                streamSize = _size;
-                return 1;
-            };       
-*/
+
      unsigned int flashStream::seek(unsigned int _pos) 
         {   pos=min(_pos, streamSize);
             debugSerial<<F("Seek:")<<pos<<endl;
             return pos;
         };
-     int flashStream::available() { 
-            //debugSerial<<pos<<"%"<<streamSize<<";"; 
+
+     int flashStream::available() 
+        { 
             if (textMode && peek()==EOFchar) return 0; 
             return (pos<streamSize);
-            };
+         };
+
      int flashStream::read() 
-            {
-                int ch = peek(); 
-                pos++; 
-                //debugSerial<<"<"<<(char)ch;
-                return ch;
-                };
+         {
+            int ch = peek(); 
+            pos++; 
+            return ch;
+         };
+
      int flashStream::peek() 
-            {    
-                if (pos<streamSize) 
-                     return EEPROM.read(startPos+pos);
-                else return -1;    
+         {    
+            if (pos<streamSize) 
+               return EEPROM.read(startPos+pos);
+            else return -1;    
             };
+
     void flashStream::flush() {
         #if defined(ESP8266) || defined(ESP32)
         if (EEPROM.commitReset())
@@ -204,7 +200,6 @@ NRFFlashStorage EEPROM;
           
     size_t flashStream::write(uint8_t ch) 
             {
-                //debugSerial<<">"<<(char)ch;
                #if defined(__AVR__)
                   EEPROM.update(startPos+pos++,(char)ch);
                   return 1;
@@ -235,8 +230,8 @@ NRFFlashStorage EEPROM;
     #endif        
 
  void flashStream::close()  
-    {
-       flush();
+    {  
+       putEOF();
     }    
 
 
diff --git a/lighthub/flashstream.h b/lighthub/flashstream.h
index 9f8290e..5cfb6d4 100644
--- a/lighthub/flashstream.h
+++ b/lighthub/flashstream.h
@@ -35,13 +35,14 @@ public:
             };   
    virtual int open(String _filename, char mode) override;
    virtual int available() override;             
-   virtual int read(); 
-   virtual int peek(); 
+   virtual int read() override;  
+   virtual int peek() override;  
    virtual unsigned int seek  (unsigned int _pos = 0) override;    
    virtual void close() override;
    virtual void flush() override;
    virtual size_t write(uint8_t ch);              
    using Print::write; 
+   virtual void putEOF() override {}; 
    virtual ~flashStream ();
 };
 
@@ -58,15 +59,6 @@ public:
     void setSize(unsigned int _size);
     int open(short fileNum, char mode='\0') ; 
     virtual int open(String _filename, char mode='\0') override;
-/*
-    virtual int  open(unsigned int _startPos=0, unsigned int _size=4096 char mode='\0') 
-            {
-                pos = 0;
-                startPos = _startPos;
-                streamSize = _size;
-                return 1;
-            };       
-*/
     virtual unsigned int seek(unsigned int _pos = 0); 
     virtual int available() override;    
     virtual int read() ;
diff --git a/lighthub/item.cpp b/lighthub/item.cpp
index 692c49b..d9130ff 100644
--- a/lighthub/item.cpp
+++ b/lighthub/item.cpp
@@ -143,6 +143,7 @@ void Item::Parse() {
             case CH_RGBW:
             case CH_RGB:
             case CH_DIMMER:
+            case CH_RGBWW:
             driver = new out_dmx (this);
   //          debugSerial<<F("DMX driver created")<<endl;
             break;
diff --git a/lighthub/item.h b/lighthub/item.h
index f554a50..68693c3 100644
--- a/lighthub/item.h
+++ b/lighthub/item.h
@@ -56,6 +56,7 @@ e-mail    anklimov@gmail.com
 #define CH_MBUS  14
 #define CH_UARTBRIDGE  15
 #define CH_ELEVATOR 16
+#define CH_RGBWW    17
 #define CH_MULTIVENT 18
 
 //#define CHANNEL_TYPES 13
diff --git a/lighthub/itemCmd.cpp b/lighthub/itemCmd.cpp
index a90b39e..0c18a60 100644
--- a/lighthub/itemCmd.cpp
+++ b/lighthub/itemCmd.cpp
@@ -179,6 +179,11 @@ bool itemCmd::setS(uint8_t s)
 //! Internally  1 - cold, 101 - warm light
 bool itemCmd::setColorTemp(int t)
 {
+  if (!t)
+  {
+  param.colorTemp=0;  
+  return true;  
+  }
   int par=map(t,153,500,0,100);
   switch (cmd.itemArgType)
   {
@@ -199,7 +204,7 @@ bool itemCmd::setColorTemp(int t)
   return true;
 }
 
-//! Setup color tempetature parameter from HSV or HSV255 types. return 0..100 value in success.
+//! Return color tempetature parameter from HSV or HSV255 types. return 153..500 value in success.
 //! -1 - if no value stored
 int itemCmd::getColorTemp()
 {
diff --git a/lighthub/main.cpp b/lighthub/main.cpp
index 9f88ce3..193a77d 100644
--- a/lighthub/main.cpp
+++ b/lighthub/main.cpp
@@ -1305,7 +1305,6 @@ int loadConfigFromEEPROM()
     sysConfStream.open(FN_CONFIG_JSON,'r');
     #endif
 
-    //JSONStream.seek();    
     if (sysConfStream.peek() == '{') {
         aJsonStream as = aJsonStream(&sysConfStream);
         cleanConf();
@@ -1364,8 +1363,8 @@ if (arg_cnt>1)
     aJsonStream jsonEEPROMStream = aJsonStream(&sysConfStream);
     infoSerial<<F("Saving config to EEPROM..");
     aJson.print(root, &jsonEEPROMStream);
-    sysConfStream.putEOF();
-    sysConfStream.flush();
+    //sysConfStream.putEOF();
+    //sysConfStream.flush();
     sysConfStream.close();
     infoSerial<<F("Saved to EEPROM")<<endl;
 #endif
@@ -1488,7 +1487,7 @@ int cmdFunctionSetMac(int arg_cnt, char **args) {
 }
 
 int cmdFunctionGet(int arg_cnt, char **args) {
-int result;    
+
 if (arg_cnt>1)
 {
     if (!strcasecmp_P(args[1],ON_P)) {sysConf.setLoadHTTPConfig(true); return 200;};
@@ -1518,6 +1517,7 @@ bool loadConfigFromHttp(int arg_cnt, char **args)
     int responseStatusCode = 0;
     char URI[64];
     char configServer[32]="";
+    String etag=sysConf.getETAG();
     if (arg_cnt > 1) {
         strncpy(configServer, args[1], sizeof(configServer) - 1);
         sysConf.setServer(configServer);
@@ -1605,6 +1605,7 @@ bool loadConfigFromHttp(int arg_cnt, char **args)
     //debugSerial<<"making GET request");get
     debugSerial<<F("Before request: Free:")<<freeRam()<<endl;
     htclient.beginRequest();
+    htclient.sendHeader("If-None-Match:",etag);
     responseStatusCode = htclient.get(URI);
     htclient.endRequest();
 
@@ -1612,12 +1613,15 @@ bool loadConfigFromHttp(int arg_cnt, char **args)
     {
     // read the status code and body of the response
     responseStatusCode = htclient.responseStatusCode();
+    
+    while (htclient.headerAvailable()) 
+                    if (htclient.readHeaderName() == "ETAG") sysConf.setETAG(htclient.readHeaderValue());
+   
     response = htclient.responseBody();
     htclient.stop();
     wdt_res();
     infoSerial<<F("HTTP Status code: ")<<responseStatusCode<<endl;
-    
-//delay(1000);
+
     if (responseStatusCode == 200) {
         debugSerial<<F("Free:")<<freeRam()<<endl;
         debugSerial<<F("Response Len:")<<response.length()<<endl;
@@ -1643,7 +1647,12 @@ bool loadConfigFromHttp(int arg_cnt, char **args)
           return false;
       }
     } 
-      else 
+      else if (responseStatusCode == 304) 
+      {
+          errorSerial<<F("Config not changed\n");
+          return false;
+      }
+     else    
     {
         errorSerial<<F("Connect failed\n");
         return false;
diff --git a/lighthub/modules/out_dmx.cpp b/lighthub/modules/out_dmx.cpp
index 9216fba..0e53e04 100644
--- a/lighthub/modules/out_dmx.cpp
+++ b/lighthub/modules/out_dmx.cpp
@@ -46,7 +46,9 @@ int out_dmx::getChanType()
     case 3:
       return CH_RGB;
     case 4:
-      return CH_RGBW;
+      return CH_RGBW; 
+    case 5:
+      return CH_RGBWW;
     default:
       return item->itemType;
   }
@@ -81,11 +83,15 @@ if (cType==CH_DIMMER) //Single channel
     return 1;
   }
 
+ int colorTemp = cmd.getColorTemp(); 
+
   switch (cType)
   {
     case CH_RGB:
      storageType=ST_RGB;
      break;
+    case CH_RGBWW:    
+    cmd.setColorTemp(0); //Supress cold conversoin
     case CH_RGBW:
      storageType=ST_RGBW;
      break;
@@ -98,9 +104,19 @@ st.assignFrom(cmd);
 
 debugSerial<<F("Assigned:");st.debugOut();
     switch (cType)
-    {
+    {      
+      case CH_RGBWW:    
+      if (colorTemp == -1) colorTemp = 255/2;
+            else colorTemp=map(colorTemp,153,500,0,255);
+      DmxWrite(getChannelAddr(3), map(st.param.w,0,255,0,colorTemp));
+      DmxWrite(getChannelAddr(4), map(st.param.w,0,255,0,255-colorTemp));
+      DmxWrite(iaddr, st.param.r);
+      DmxWrite(getChannelAddr(1), st.param.g);
+      DmxWrite(getChannelAddr(2), st.param.b);
+     
+      break;
       case CH_RGBW:
-      DmxWrite(getChannelAddr(3), st.param.w);
+          DmxWrite(getChannelAddr(3), st.param.w);
       case CH_RGB:
       DmxWrite(iaddr, st.param.r);
       DmxWrite(getChannelAddr(1), st.param.g);
diff --git a/lighthub/options.h b/lighthub/options.h
index 8195e45..31584c6 100644
--- a/lighthub/options.h
+++ b/lighthub/options.h
@@ -199,10 +199,14 @@
 //All options available
 #ifdef CONTROLLINO
 #define modbusSerial Serial3
-#define AC_Serial Serial2
+    #ifndef AC_Serial
+    #define AC_Serial Serial2
+    #endif
 #else
 #define modbusSerial Serial2
-#define AC_Serial Serial3
+    #ifndef AC_Serial
+    #define AC_Serial Serial3
+    #endif
 #endif
 #define dmxin DMXSerial
 #define dmxout DmxSimple