diff --git a/build-flags/build_flags_esp8266-wifi b/build-flags/build_flags_esp8266-wifi
index 12eea7e..ca0d4d5 100644
--- a/build-flags/build_flags_esp8266-wifi
+++ b/build-flags/build_flags_esp8266-wifi
@@ -1,2 +1,3 @@
 -DMODBUS_DISABLE
 #-DCOUNTER_DISABLE
+-DOTA
diff --git a/lighthub/item.cpp b/lighthub/item.cpp
index 31e3200..29ed8e0 100644
--- a/lighthub/item.cpp
+++ b/lighthub/item.cpp
@@ -685,7 +685,7 @@ int Item::Ctrl(short cmd, short n, int *Parameters, boolean send, int suffixCode
         case CMD_ON:
 
 
-        if (itemType==CH_RGBW && getCmd() == CMD_ON && send /*&& getEnableCMD(500) */) {
+        if (itemType==CH_RGBW && getCmd() == CMD_ON && send  && (chActive>0)/*&& getEnableCMD(500) */) {
                   debugSerial<<F("Force White\n");
                   itemType = CH_WHITE;
                   Par[1] = 0;   //Zero saturation
@@ -869,7 +869,7 @@ int Item::Ctrl(short cmd, short n, int *Parameters, boolean send, int suffixCode
         // 0..50 - white + RGB
         //50..100 RGB
         {
-            int k;
+  //          int k;
             if (Par[1]<50 && iaddr>0) { // Using white
                             DmxWrite(iaddr + 3, map((50 - Par[1]) * Par[2], 0, 5000, 0, 255));
                             int rgbvLevel = map (Par[1],0,50,0,255*2);
@@ -978,8 +978,8 @@ int Item::Ctrl(short cmd, short n, int *Parameters, boolean send, int suffixCode
             //prescaler = 4 ---> PWM frequency is 120 Hz
             //prescaler = 5 ---> PWM frequency is 30 Hz
             //prescaler = 6 ---> PWM frequency is <20 Hz
-            int tval = 7;             // this is 111 in binary and is used as an eraser
 #if defined(__AVR_ATmega2560__)
+            int tval = 7;             // this is 111 in binary and is used as an eraser
             TCCR4B &= ~tval;   // this operation (AND plus NOT),  set the three bits in TCCR2B to 0
             TCCR3B &= ~tval;
             tval = 2;
@@ -997,9 +997,9 @@ int Item::Ctrl(short cmd, short n, int *Parameters, boolean send, int suffixCode
             VacomSetFan(Par[0], cmd);
             break;
         case CH_VCTEMP: {
-            Item it(itemArg->valuestring);
-            if (it.isValid() && it.itemType == CH_VC)
-                VacomSetHeat(it.getArg(), Par[0], cmd);
+//            Item it(itemArg->valuestring);
+//            if (it.isValid() && it.itemType == CH_VC)
+            VacomSetHeat(Par[0], cmd);
             break;
         }
 #endif
@@ -1172,8 +1172,8 @@ int Item::modbusDimmerSet(uint16_t value)
                 if (numpar >= (MODBUS_CMD_ARG_MAX_SCALE+1)) _maxval = aJson.getArrayItem(itemArg, MODBUS_CMD_ARG_MAX_SCALE)->valueint;
                 int _regType = MODBUS_HOLDING_REG_TYPE;
                 if (numpar >= (MODBUS_CMD_ARG_REG_TYPE+1)) _regType = aJson.getArrayItem(itemArg, MODBUS_CMD_ARG_REG_TYPE)->valueint;
-                if (_maxval) modbusDimmerSet(_addr, _reg, _regType, _mask, map(value, 0, 100, 0, _maxval));
-                             else modbusDimmerSet(_addr, _reg, _regType, _mask, value);
+                if (_maxval) return modbusDimmerSet(_addr, _reg, _regType, _mask, map(value, 0, 100, 0, _maxval));
+                             else return modbusDimmerSet(_addr, _reg, _regType, _mask, value);
             }
         }
 #endif
@@ -1221,8 +1221,14 @@ int Item::VacomSetFan(int8_t val, int8_t cmd) {
 #define a 0.1842f
 #define b -36.68f
 
-int Item::VacomSetHeat(int addr, int8_t val, int8_t cmd) {
+int Item::VacomSetHeat(int8_t val, int8_t cmd) {
     uint8_t result;
+    int addr;
+
+    Item it(itemArg->valuestring);
+    if (it.isValid() && it.itemType == CH_VC) addr=it.getArg();
+    else return 0;
+
     debugSerial<<F("VC_heat#")<<addr<<F("=")<<val<<F(" cmd=")<<cmd<<endl;
     if (modbusBusy) {
       setCmd(cmd);
@@ -1300,7 +1306,7 @@ int Item::modbusDimmerSet(int addr, uint16_t _reg, int _regType, int _mask, uint
 
 int Item::checkFM() {
     if (modbusBusy) return -1;
-    if (checkModbusRetry()) return -2;
+    if (checkVCRetry()) return -2;
     modbusBusy = 1;
 
     uint8_t j, result;
@@ -1404,13 +1410,39 @@ int Item::checkFM() {
 }
 
 boolean Item::checkModbusRetry() {
+  if (modbusBusy) return false;
+//    int cmd = getCmd();
+    if (getFlag(SEND_RETRY)) {   // if last sending attempt of command was failed
+      int val = getVal();
+      debugSerial<<F("Retrying dimmer CMD\n");
+      clearFlag(SEND_RETRY);     // Clean retry flag
+      modbusDimmerSet(val);
+      return true;
+    }
+return false;
+}
+
+boolean Item::checkVCRetry() {
+    if (modbusBusy) return false;
     int cmd = getCmd();
     if (getFlag(SEND_RETRY)) {   // if last sending attempt of command was failed
       int val = getVal();
-      debugSerial<<F("Retrying CMD\n");
+      debugSerial<<F("Retrying VC CMD\n");
       clearFlag(SEND_RETRY);     // Clean retry flag
-      //Ctrl(cmd,1,&val);      // Execute command again
-      modbusDimmerSet(val);
+      VacomSetFan(val,cmd);
+      return true;
+    }
+return false;
+}
+
+boolean Item::checkHeatRetry() {
+    if (modbusBusy) return false;
+    int cmd = getCmd();
+    if (getFlag(SEND_RETRY)) {   // if last sending attempt of command was failed
+      int val = getVal();
+      debugSerial<<F("Retrying VC temp CMD\n");
+      clearFlag(SEND_RETRY);     // Clean retry flag
+      VacomSetHeat(val,cmd);
       return true;
     }
 return false;
@@ -1537,6 +1569,11 @@ switch (cause)
             sendDelayedStatus();
             return INTERVAL_CHECK_MODBUS;
             break;
+        case CH_VCTEMP:
+            checkHeatRetry();
+            sendDelayedStatus();
+            return INTERVAL_CHECK_MODBUS;
+            break;
       /*  case CH_RGB:    //All channels with slider generate too many updates
         case CH_RGBW:
         case CH_DIMMER:
diff --git a/lighthub/item.h b/lighthub/item.h
index 4854405..22d43fd 100644
--- a/lighthub/item.h
+++ b/lighthub/item.h
@@ -193,7 +193,7 @@ class Item
   protected:
   //short cmd2changeActivity(int lastActivity, short defaultCmd = CMD_SET);
   int VacomSetFan (int8_t  val, int8_t  cmd=0);
-  int VacomSetHeat(int addr, int8_t  val, int8_t  cmd=0);
+  int VacomSetHeat(int8_t  val, int8_t  cmd=0);
   int modbusDimmerSet(int addr, uint16_t _reg, int _regType, int _mask, uint16_t value);
   int modbusDimmerSet(uint16_t value);
   void mb_fail();
@@ -201,6 +201,8 @@ class Item
   int checkModbusDimmer();
   int checkModbusDimmer(int data);
   boolean checkModbusRetry();
+  boolean checkVCRetry();
+  boolean checkHeatRetry();
   void sendDelayedStatus();
 
   int checkFM();
diff --git a/lighthub/main.cpp b/lighthub/main.cpp
index b0658ad..9ae6055 100644
--- a/lighthub/main.cpp
+++ b/lighthub/main.cpp
@@ -67,6 +67,9 @@ PWM Out
 
 #include "main.h"
 
+#if defined(OTA)
+#include <ArduinoOTA.h>
+#endif
 
 #if defined(__SAM3X8E__)
 DueFlashStorage EEPROM;
@@ -301,6 +304,11 @@ lan_status lanLoop() {
             break;
 
         case HAVE_IP_ADDRESS:
+        #ifdef OTA
+        // start the OTEthernet library with internal (flash) based storage
+        ArduinoOTA.begin(Ethernet.localIP(), "Lighthub", "password", InternalStorage);
+        #endif
+
             if (!configOk)
                 lanStatus = loadConfigFromHttp(0, NULL);
             else lanStatus = IP_READY_CONFIG_LOADED_CONNECTING_TO_BROKER;
@@ -308,12 +316,15 @@ lan_status lanLoop() {
 
         case IP_READY_CONFIG_LOADED_CONNECTING_TO_BROKER:
             wdt_res();
+
+
+
             ip_ready_config_loaded_connecting_to_broker();
             break;
 
         case RETAINING_COLLECTING:
             if (millis() > nextLanCheckTime) {
-                char buf[MQTT_TOPIC_LENGTH];
+                char buf[MQTT_TOPIC_LENGTH+1];
 
                 //Unsubscribe from status topics..
                 //strncpy_P(buf, outprefix, sizeof(buf));
@@ -579,7 +590,7 @@ void ip_ready_config_loaded_connecting_to_broker() {
         //    wdt_en();
             configOk = true;
             // ... Temporary subscribe to status topic
-            char buf[MQTT_TOPIC_LENGTH];
+            char buf[MQTT_TOPIC_LENGTH+1];
 
   //          strncpy_P(buf, outprefix, sizeof(buf));
             setTopic(buf,sizeof(buf),T_OUT);
@@ -1641,6 +1652,10 @@ void setupCmdArduino() {
 }
 
 void loop_main() {
+  #if defined(OTA)
+  ArduinoOTA.poll();
+  #endif
+
   #if defined(M5STACK)
    // Initialize the M5Stack object
    M5.update();
diff --git a/lighthub/modules/in_ccs811_hdc1080.cpp b/lighthub/modules/in_ccs811_hdc1080.cpp
index 55bd1af..c790b8b 100644
--- a/lighthub/modules/in_ccs811_hdc1080.cpp
+++ b/lighthub/modules/in_ccs811_hdc1080.cpp
@@ -73,7 +73,7 @@ return 1;
 
 void i2cReset(){
 Wire.endTransmission(true);
-#if defined (ARDUINO_ARCH_ESP8266)
+#if defined (SCL_RESET)
 SCL_LOW();
 delay(300);
 SCL_HIGH();
diff --git a/lighthub/modules/in_ccs811_hdc1080.h b/lighthub/modules/in_ccs811_hdc1080.h
index d5433fa..aece938 100644
--- a/lighthub/modules/in_ccs811_hdc1080.h
+++ b/lighthub/modules/in_ccs811_hdc1080.h
@@ -18,8 +18,17 @@
 
 #define SCL_LOW()   (GPES = (1 << twi_scl))
 #define SCL_HIGH()  (GPEC = (1 << twi_scl))
+#define SCL_RESET
 #endif
 
+/*
+#if defined (__SAM3X8E__)
+#define SCL_LOW()   digitalWrite(21,LOW)
+#define SCL_HIGH()  digitalWrite(21,HIGH)
+#define SCL_RESET
+#endif
+*/
+
 #if defined (ARDUINO_ARCH_ESP32)
 #undef WAK_PIN
 //#ifndef WAK_PIN
diff --git a/platformio.ini b/platformio.ini
index 19150ad..272303f 100644
--- a/platformio.ini
+++ b/platformio.ini
@@ -29,7 +29,7 @@ default_envs =
 ;    due-5100
 
 ; Arduino DUE + Ethernet shield Wiznet 5500
-;   due-5500
+   due-5500
 
 ; ESP 8266
 ;    esp8266-wifi
@@ -86,6 +86,7 @@ lib_ignore =
     SparkFun CCS811 Arduino Library
     ESP8266HTTPClient
     M5Stack
+
 lib_deps =
     https://github.com/anklimov/Arduino-Temperature-Control-Library.git
     https://github.com/anklimov/DS2482_OneWire
@@ -102,6 +103,7 @@ lib_deps =
     Streaming
     https://github.com/anklimov/NRFFlashStorage
     Adafruit NeoPixel
+    ArduinoOTA
 ;    https://github.com/livello/PrintEx#is-select-redecl
 
 
@@ -152,6 +154,7 @@ lib_deps =
     https://github.com/sparkfun/SparkFun_CCS811_Arduino_Library.git
     M5Stack
     Adafruit NeoPixel
+    ArduinoOTA
 
 [env:esp32-wifi]
 platform = espressif32
@@ -200,6 +203,8 @@ lib_deps =
     ;SparkFun CCS811 Arduino Library
     https://github.com/sparkfun/SparkFun_CCS811_Arduino_Library.git
     Adafruit NeoPixel
+    ArduinoOTA
+
 [env:due-5100]
 platform = atmelsam
 framework = arduino
@@ -242,6 +247,7 @@ lib_deps =
     ClosedCube HDC1080
     SparkFun CCS811 Arduino Library
     Adafruit NeoPixel
+    ArduinoOTA
 
 [env:mega2560slim-5100]
 platform = atmelavr
@@ -282,6 +288,7 @@ lib_deps =
     ClosedCube HDC1080
     SparkFun CCS811 Arduino Library
     Adafruit NeoPixel
+    ArduinoOTA
 
 [env:mega2560-5500]
 platform = atmelavr
@@ -321,12 +328,19 @@ lib_deps =
         ClosedCube HDC1080
         SparkFun CCS811 Arduino Library
         Adafruit NeoPixel
+        ArduinoOTA
 
 
 [env:esp8266-wifi]
 platform = espressif8266
 framework = arduino
 board = nodemcuv2
+upload_protocol = espota
+upload_port = Lighthub.local
+   ;192.168.88.46
+upload_flags =
+  --auth=password
+;  --port=65280
 build_flags = !python get_build_flags.py esp8266-wifi
 lib_ignore =
     DmxSimple
@@ -368,6 +382,7 @@ lib_deps =
     ClosedCube HDC1080
     SparkFun CCS811 Arduino Library
     Adafruit NeoPixel
+    ArduinoOTA
 
 [env:mega2560-5100]
 platform = atmelavr
@@ -409,6 +424,7 @@ lib_deps =
     ClosedCube HDC1080
     SparkFun CCS811 Arduino Library
     Adafruit NeoPixel
+    ArduinoOTA
 
 [env:due-5500]
 platform = atmelsam
@@ -432,6 +448,7 @@ lib_ignore =
     ESP_EEPROM
     EEPROM
     M5Stack
+    ArduinoOTA
 lib_deps =
     https://github.com/sebnil/DueFlashStorage
     https://github.com/anklimov/Arduino-Temperature-Control-Library.git
@@ -456,6 +473,7 @@ lib_deps =
     SparkFun CCS811 Arduino Library
     Adafruit NeoPixel
 
+
 [env:lighthub21]
 platform = atmelsam
 framework = arduino
@@ -500,6 +518,7 @@ lib_deps =
         ClosedCube HDC1080
         SparkFun CCS811 Arduino Library
         Adafruit NeoPixel
+        ArduinoOTA
 
 
 [env:controllino]
@@ -542,6 +561,7 @@ lib_deps =
     ClosedCube HDC1080
     SparkFun CCS811 Arduino Library
     Adafruit NeoPixel
+    ArduinoOTA
 
 [env:stm32-enc2860]
 platform = ststm32
@@ -588,3 +608,4 @@ lib_deps =
     UIPEthernet
     https://github.com/anklimov/NRFFlashStorage
     Adafruit NeoPixel
+    ArduinoOTA