diff --git a/build-flags/build_flags_esp32-wifi b/build-flags/build_flags_esp32-wifi
index 91926d7..a3cdb86 100644
--- a/build-flags/build_flags_esp32-wifi
+++ b/build-flags/build_flags_esp32-wifi
@@ -14,3 +14,12 @@
 #-DUSE_1W_PIN=16
 #-DW5500_CS_PIN=15
 #-DPID_DISABLE
+
+#Define pins for Serial1. Default - 9/10 is utilized by ESP flash 
+#-DRX1=15
+#-DTX1=2
+
+-DMODBUS_UART_RX_PIN=15
+-DMODBUS_UART_TX_PIN=2
+-DmodbusSerial=Serial1
+
diff --git a/lighthub/item.cpp b/lighthub/item.cpp
index 33f1673..8ea231a 100644
--- a/lighthub/item.cpp
+++ b/lighthub/item.cpp
@@ -49,6 +49,7 @@ e-mail    anklimov@gmail.com
 #include "modules/out_pwm.h"
 #include "modules/out_pid.h"
 #include "modules/out_multivent.h"
+#include "modules/out_uartbridge.h"
 
 short modbusBusy = 0;
 bool isPendedModbusWrites = false;
@@ -183,6 +184,13 @@ void Item::Parse() {
 //          debugSerial<<F("AC driver created")<<endl;
           break;
 #endif
+
+#ifdef   UARTBRIDGE_ENABLE
+          case CH_UARTBRIDGE:
+          driver = new out_UARTbridge (this);
+//          debugSerial<<F("AC driver created")<<endl;
+          break;
+#endif
           default: ;
         }
 //        debugSerial << F(" Item:") << itemArr->name << F(" T:") << itemType << F(" =") << getArg() << endl;
@@ -1871,7 +1879,7 @@ return false;
 */
 int Item::checkModbusDimmer() {
     if (modbusBusy) return -1;
-    if (checkModbusRetry()) return -2;
+    //if (checkModbusRetry()) return -2;
 
     short numpar = 0;
     if ((itemArg->type != aJson_Array) || ((numpar = aJson.getArraySize(itemArg)) < 2)) {
diff --git a/lighthub/item.h b/lighthub/item.h
index dcb369e..f6f8aa9 100644
--- a/lighthub/item.h
+++ b/lighthub/item.h
@@ -53,6 +53,7 @@ e-mail    anklimov@gmail.com
 #define CH_MOTOR  12
 #define CH_PID   13
 #define CH_MBUS  14
+#define CH_UARTBRIDGE  15
 #define CH_MULTIVENT 18
 
 //#define CHANNEL_TYPES 13
diff --git a/lighthub/modules/out_modbus.cpp b/lighthub/modules/out_modbus.cpp
index af380a4..4dd364c 100644
--- a/lighthub/modules/out_modbus.cpp
+++ b/lighthub/modules/out_modbus.cpp
@@ -22,11 +22,13 @@ struct reg_t
   const uint8_t id;
 };
 
+/*
 struct serial_t
 {
   const char verb[4];
   const serialParamType mode;
 };
+*/
 
 #define PAR_I16 1
 #define PAR_I32 2
@@ -53,6 +55,7 @@ const reg_t regSize_P[] PROGMEM =
 } ;
 #define regSizeNum sizeof(regSize_P)/sizeof(reg_t)
 
+/*
 const serial_t serialModes_P[] PROGMEM =
 {
   { "8E1", (serialParamType) SERIAL_8E1},//(uint16_t) US_MR_CHRL_8_BIT | US_MR_NBSTOP_1_BIT | UART_MR_PAR_EVEN },
@@ -90,6 +93,8 @@ serialParamType  str2SerialParam(char * str)
   debugSerial<< F("Default serial mode N81 used");
   return static_cast<serialParamType> (SERIAL_8N1);
 }
+*/
+
 int  str2regSize(char * str)
 {
   for(uint8_t i=0; i<regSizeNum && str;i++)
@@ -131,6 +136,8 @@ bool out_Modbus::getConfig()
     modbusSerial.begin(store->baud, static_cast <USARTClass::USARTModes> (store->serialParam));
     #elif defined (ARDUINO_ARCH_ESP8266)
     modbusSerial.begin(store->baud, static_cast <SerialConfig>(store->serialParam));
+    #elif defined (ARDUINO_ARCH_ESP32)
+    modbusSerial.begin(store->baud, (store->serialParam),MODBUS_UART_RX_PIN,MODBUS_UART_TX_PIN);
     #else
     modbusSerial.begin(store->baud, (store->serialParam));
     #endif
@@ -375,6 +382,7 @@ if ((store->pollingRegisters || store->pollingIrs) && !modbusBusy && (Status() =
     modbusSerial.begin(store->baud, static_cast <USARTClass::USARTModes> (store->serialParam));
     #elif defined (ARDUINO_ARCH_ESP8266)
     modbusSerial.begin(store->baud, static_cast <SerialConfig>(store->serialParam));
+    Serial1.begin()
     #elif defined (ESP32)
     //modbusSerial.begin(store->baud, store->serialParam);
     //delay(100);
diff --git a/lighthub/modules/out_modbus.h b/lighthub/modules/out_modbus.h
index 334eb9d..7a6030c 100644
--- a/lighthub/modules/out_modbus.h
+++ b/lighthub/modules/out_modbus.h
@@ -4,12 +4,9 @@
 #include <abstractout.h>
 #include <item.h>
 #include "itemCmd.h"
+#include <utils.h>
+
 
-#if defined(ESP32)
-#define serialParamType uint32_t
-#else
-#define serialParamType uint16_t
-#endif
 
 class mbPersistent : public chPersistent  {
 
diff --git a/lighthub/modules/out_uartbridge.cpp b/lighthub/modules/out_uartbridge.cpp
new file mode 100644
index 0000000..a5be807
--- /dev/null
+++ b/lighthub/modules/out_uartbridge.cpp
@@ -0,0 +1,222 @@
+#ifdef UARTBRIDGE_ENABLE
+
+#include "modules/out_uartbridge.h"
+#include "Arduino.h"
+#include "options.h"
+#include "utils.h"
+#include "Streaming.h"
+
+#include "item.h"
+#include <ModbusMaster.h>
+#include "main.h"
+#include <HardwareSerial.h>
+
+extern aJsonObject *modbusObj;
+extern ModbusMaster node;
+extern short modbusBusy;
+extern void modbusIdle(void) ;
+
+/*
+struct reg_t
+{
+  const char verb[4];
+  const uint8_t id;
+};
+
+
+#define PAR_I16 1
+#define PAR_I32 2
+#define PAR_U16 3
+#define PAR_U32 4
+#define PAR_I8H 5
+#define PAR_I8L 6
+#define PAR_U8H 7
+#define PAR_U8L 8
+#define PAR_TENS 9
+
+const reg_t regSize_P[] PROGMEM =
+{
+  { "i16", (uint8_t) PAR_I16 },
+  { "i32", (uint8_t) PAR_I32 },
+  { "u16", (uint8_t) PAR_U16 },
+  { "u32", (uint8_t) PAR_U32 },
+  { "i8h", (uint8_t) PAR_I8H },
+  { "i8l", (uint8_t) PAR_I8L },
+  { "u8h", (uint8_t) PAR_U8H },
+  { "u8l", (uint8_t) PAR_U8L },
+  { "x10", (uint8_t) PAR_TENS }
+} ;
+#define regSizeNum sizeof(regSize_P)/sizeof(reg_t)
+
+int  str2regSize(char * str)
+{
+  for(uint8_t i=0; i<regSizeNum && str;i++)
+      if (strcmp_P(str, regSize_P[i].verb) == 0)
+           return pgm_read_byte_near(&regSize_P[i].id);
+  return (int) PAR_I16;
+}
+*/
+
+bool out_UARTbridge::getConfig()
+{
+  // Retrieve and store template values from global modbus settings
+  if (!store || !item || !item->itemArg || (item->itemArg->type != aJson_Object))
+  {
+    errorSerial<<F("UARTbridge: config failed:")<<(bool)store<<F(",")<<(bool)item<<F(",")<<(bool)item->itemArg<<F(",")<<(item->itemArg->type != aJson_Object)<<F(",")<<endl;
+    return false;
+  }
+
+  aJsonObject * serialParamObj=aJson.getObjectItem(item->itemArg, "serial");
+  if (serialParamObj && serialParamObj->type == aJson_String) store->serialParam = str2SerialParam(serialParamObj->valuestring);
+     else store->serialParam = SERIAL_8N1;
+
+  aJsonObject * baudObj=aJson.getObjectItem(item->itemArg, "baud");
+  if (baudObj && baudObj->type == aJson_Int && baudObj->valueint) store->baud = baudObj->valueint;
+     else store->baud = 9600;
+
+    #if defined (__SAM3X8E__)
+    MODULE_UATRBRIDGE_UARTA.begin(store->baud, static_cast <USARTClass::USARTModes> (store->serialParam));
+    MODULE_UATRBRIDGE_UARTB.begin(store->baud, static_cast <USARTClass::USARTModes> (store->serialParam));
+    #elif defined (ARDUINO_ARCH_ESP8266)
+    MODULE_UATRBRIDGE_UARTA.begin(store->baud, static_cast <SerialConfig>(store->serialParam));
+    MODULE_UATRBRIDGE_UARTA.begin(store->baud, static_cast <SerialConfig>(store->serialParam));
+    #elif defined (ARDUINO_ARCH_ESP32)
+    MODULE_UATRBRIDGE_UARTA.begin(store->baud, (store->serialParam),MODULE_UATRBRIDGE_UARTA_RX_PIN,MODULE_UATRBRIDGE_UARTA_TX_PIN);
+    MODULE_UATRBRIDGE_UARTB.begin(store->baud, (store->serialParam),MODULE_UATRBRIDGE_UARTB_RX_PIN,MODULE_UATRBRIDGE_UARTB_TX_PIN);
+    #else
+    MODULE_UATRBRIDGE_UARTA.begin(store->baud, (store->serialParam));
+    MODULE_UATRBRIDGE_UARTB.begin(store->baud, (store->serialParam));
+    #endif
+
+  return true;
+  }
+
+
+int  out_UARTbridge::Setup()
+{
+abstractOut::Setup();    
+if (!store) store= (ubPersistent *)item->setPersistent(new ubPersistent);
+if (!store)
+              { errorSerial<<F("UARTbridge: Out of memory")<<endl;
+                return 0;}
+
+//store->timestamp=millisNZ();
+if (getConfig())
+    {
+        infoSerial<<F("UARTbridge config loaded ")<< item->itemArr->name<<endl;
+        store->driverStatus = CST_INITIALIZED;
+        return 1;
+      }
+else
+ {  errorSerial<<F("UARTbridge config error")<<endl;
+    store->driverStatus = CST_FAILED;
+    return 0;
+  }
+
+}
+
+int  out_UARTbridge::Stop()
+{
+Serial.println("UARTbridge De-Init");
+
+delete store;
+item->setPersistent(NULL);
+store = NULL;
+return 1;
+}
+
+int  out_UARTbridge::Status()
+{
+if (store)
+    return store->driverStatus;
+return CST_UNKNOWN;
+}
+
+int out_UARTbridge::Poll(short cause)
+{
+  int chA;
+  int chB;
+
+  while (MODULE_UATRBRIDGE_UARTA.available())
+          {
+          chA=MODULE_UATRBRIDGE_UARTA.read();  
+          MODULE_UATRBRIDGE_UARTB.write(chA);
+          debugSerial<<F("<")<<_HEX(chA);
+          }
+
+    while (MODULE_UATRBRIDGE_UARTB.available())
+          {
+          chB=MODULE_UATRBRIDGE_UARTB.read();  
+          MODULE_UATRBRIDGE_UARTA.write(chB);
+          debugSerial<<F(">")<<_HEX(chB);
+          }        
+
+return 1;//store->pollingInterval;
+};
+
+int out_UARTbridge::getChanType()
+{
+   return CH_MODBUS;
+}
+
+
+//!Control unified Modbus item  
+// Priority of selection sub-items control to:
+// 1. if defined standard suffix Code inside cmd
+// 2. custom textual subItem
+// 3. non-standard numeric  suffix Code equal param id
+
+int out_UARTbridge::Ctrl(itemCmd cmd,   char* subItem, bool toExecute)
+{
+//int chActive = item->isActive();
+//bool toExecute = (chActive>0);
+//itemCmd st(ST_UINT32,CMD_VOID);
+
+int suffixCode = cmd.getSuffix();
+
+//                    aJsonObject *typeObj = aJson.getObjectItem(paramObj, "type");
+//                    aJsonObject *mapObj = aJson.getObjectItem(paramObj, "map");
+//                    aJsonObject * itemParametersObj = aJson.getArrayItem(item->itemArg, 2);
+//                    uint16_t data = node.getResponseBuffer(posInBuffer);
+
+
+
+if (cmd.isCommand() && !suffixCode) suffixCode=S_CMD; //if some known command find, but w/o correct suffix - got it
+
+switch(suffixCode)
+{
+case S_NOTFOUND:
+  // turn on  and set
+toExecute = true;
+debugSerial<<F("Forced execution");
+case S_SET:
+//case S_ESET:
+          if (!cmd.isValue()) return 0;
+
+//TODO
+          return 1;
+          //break;
+
+case S_CMD:
+      switch (cmd.getCmd())
+          {
+          case CMD_ON:
+
+            return 1;
+
+            case CMD_OFF:
+
+            return 1;
+
+            default:
+            debugSerial<<F("Unknown cmd ")<<cmd.getCmd()<<endl;
+          } //switch cmd
+
+    default:
+  debugSerial<<F("Unknown suffix ")<<suffixCode<<endl;
+} //switch suffix
+
+return 0;
+}
+
+#endif
diff --git a/lighthub/modules/out_uartbridge.h b/lighthub/modules/out_uartbridge.h
new file mode 100644
index 0000000..a59dcf5
--- /dev/null
+++ b/lighthub/modules/out_uartbridge.h
@@ -0,0 +1,74 @@
+#pragma once
+#include "options.h"
+#ifdef UARTBRIDGE_ENABLE
+#include <abstractout.h>
+#include <item.h>
+#include "itemCmd.h"
+#include "utils.h"
+
+#if defined(ESP32)
+#define serialParamType uint32_t
+#else
+#define serialParamType uint16_t
+#endif
+
+#ifndef MODULE_UATRBRIDGE_UARTA
+#define MODULE_UATRBRIDGE_UARTA Serial1
+#endif
+
+#ifndef MODULE_UATRBRIDGE_UARTB
+#define MODULE_UATRBRIDGE_UARTB Serial2
+#endif
+
+#ifndef MODULE_UATRBRIDGE_UARTA_RX_PIN
+#define MODULE_UATRBRIDGE_UARTA_RX_PIN 15
+#endif
+
+#ifndef MODULE_UATRBRIDGE_UARTA_TX_PIN
+#define MODULE_UATRBRIDGE_UARTA_TX_PIN 2
+#endif
+
+#ifndef MODULE_UATRBRIDGE_UARTB_RX_PIN
+#define MODULE_UATRBRIDGE_UARTB_RX_PIN -1
+#endif
+
+#ifndef MODULE_UATRBRIDGE_UARTB_TX_PIN
+#define MODULE_UATRBRIDGE_UARTB_TX_PIN -1
+#endif
+
+class ubPersistent : public chPersistent  {
+
+public:
+//  int addr
+  int8_t driverStatus;
+  int baud;
+  serialParamType serialParam;
+  //uint16_t pollingInterval;
+  //uint32_t timestamp;
+  //aJsonObject * pollingRegisters;
+  //aJsonObject * pollingIrs;
+  //aJsonObject * parameters;
+};
+
+
+
+class out_UARTbridge : public abstractOut {
+public:
+
+    out_UARTbridge(Item * _item):abstractOut(_item){store = (ubPersistent *) item->getPersistent();};
+    int Setup() override;
+    int Poll(short cause) override;
+    int Stop() override;
+    int Status() override;
+    int getChanType() override;
+    int Ctrl(itemCmd cmd, char* subItem=NULL, bool toExecute=true) override;
+    int getDefaultStorageType(){return ST_INT32;};
+    //int Ctrl(short cmd, short n=0, int * Parameters=NULL, int suffixCode=0, char* subItem=NULL) override;
+
+protected:
+    ubPersistent * store;
+    bool getConfig();
+//    int findRegister(int registerNum, int posInBuffer, int regType);
+//    void pollModbus(aJsonObject * reg, int regType);
+};
+#endif
diff --git a/lighthub/options.h b/lighthub/options.h
index 9d50b9c..929f921 100644
--- a/lighthub/options.h
+++ b/lighthub/options.h
@@ -158,6 +158,7 @@
 
 #define DEFAULT_INC_STEP 5
 
+
 #if defined(ARDUINO_ARCH_AVR)
 //All options available
 #ifdef CONTROLLINO
@@ -172,8 +173,14 @@
 #endif
 
 #if defined(__SAM3X8E__)
+#ifndef modbusSerial
 #define modbusSerial Serial2
+#endif
+
+#ifndef AC_Serial
 #define AC_Serial Serial3
+#endif
+
 #define dmxout DmxDue1
 #define dmxin  DmxDue1
 #endif
@@ -193,10 +200,16 @@
 #define _espdmx
 #endif
 
+#ifndef modbusSerial
 #define modbusSerial Serial1
+#endif
+
+#ifndef AC_Serial
 #define AC_Serial Serial1
 #endif
 
+#endif
+
 #if defined(ARDUINO_ARCH_ESP32)
 #undef _dmxin
 //#undef _modbus
@@ -206,10 +219,25 @@
 #endif
 //#undef _dmxout
 //#undef modbusSerial
+#ifndef modbusSerial
 #define modbusSerial Serial2
+#endif
+
+#ifndef AC_Serial
 #define AC_Serial Serial2
 #endif
 
+
+#ifndef MODBUS_UART_RX_PIN
+#define MODBUS_RX_PIN -1
+#endif
+
+#ifndef MODBUS_UART_TX_PIN
+#define MODBUS_TX_PIN -1
+#endif
+
+#endif
+
 #ifndef _dmxout
 #undef _artnet
 #endif
diff --git a/lighthub/utils.cpp b/lighthub/utils.cpp
index 7b2766b..b047ec4 100644
--- a/lighthub/utils.cpp
+++ b/lighthub/utils.cpp
@@ -26,6 +26,8 @@ e-mail    anklimov@gmail.com
 
 #include "item.h"
 #include <PubSubClient.h>
+#include <HardwareSerial.h>
+
 extern int8_t configLocked;
 extern int8_t ethernetIdleCount;
 extern PubSubClient mqttClient;
@@ -683,6 +685,49 @@ unsigned long millisNZ(uint8_t shift)
  return now;
 }
 
+struct serial_t
+{
+  const char verb[4];
+  const serialParamType mode;
+};
 
+
+const serial_t serialModes_P[] PROGMEM =
+{
+  { "8E1", (serialParamType) SERIAL_8E1},//(uint16_t) US_MR_CHRL_8_BIT | US_MR_NBSTOP_1_BIT | UART_MR_PAR_EVEN },
+  { "8N1", (serialParamType) SERIAL_8N1},
+  { "8E2", (serialParamType) SERIAL_8E2},
+  { "8N2", (serialParamType) SERIAL_8N2},
+  { "8O1", (serialParamType) SERIAL_8O1},
+  { "8O2", (serialParamType) SERIAL_8O2},
+//  { "8M1", SERIAL_8M1},
+//  { "8S1", SERIAL_8S1},
+  { "7E1", (serialParamType) SERIAL_7E1},//(uint16_t) US_MR_CHRL_8_BIT | US_MR_NBSTOP_1_BIT | UART_MR_PAR_EVEN },
+  { "7N1", (serialParamType) SERIAL_7N1},
+  { "7E2", (serialParamType) SERIAL_7E2},
+  { "7N2", (serialParamType) SERIAL_7N2},
+  { "7O1", (serialParamType) SERIAL_7O1},
+  { "7O2", (serialParamType) SERIAL_7O2}
+//  { "7M1", SERIAL_7M1},
+//  { "7S1", SERIAL_7S1}
+} ;
+
+#define serialModesNum sizeof(serialModes_P)/sizeof(serial_t)
+
+serialParamType  str2SerialParam(char * str)
+{ debugSerial<<str<<F(" =>");
+  for(uint8_t i=0; i<serialModesNum && str;i++)
+      if (strcmp_P(str, serialModes_P[i].verb) == 0)
+           {
+
+           //debugSerial<< i << F(" ") << pgm_read_word_near(&serialModes_P[i].mode)<< endl;
+           if (sizeof(serialModesNum)==4)
+             return pgm_read_dword_near(&serialModes_P[i].mode);
+           else 
+             return pgm_read_word_near(&serialModes_P[i].mode);
+         }
+  debugSerial<< F("Default serial mode N81 used");
+  return static_cast<serialParamType> (SERIAL_8N1);
+}
 #pragma message(VAR_NAME_VALUE(debugSerial))
 #pragma message(VAR_NAME_VALUE(SERIAL_BAUD))
diff --git a/lighthub/utils.h b/lighthub/utils.h
index 91aaf0f..209b6f7 100644
--- a/lighthub/utils.h
+++ b/lighthub/utils.h
@@ -43,6 +43,12 @@ enum topicType {
     T_OUT = 3
   };
 
+#if defined(ESP32)
+#define serialParamType uint32_t
+#else
+#define serialParamType uint16_t
+#endif
+
 void PrintBytes(uint8_t* addr, uint8_t count, bool newline);
 void SetBytes(uint8_t* addr, uint8_t count, char * out);
 void SetAddr(char * out,  uint8_t* addr);
@@ -67,3 +73,4 @@ bool executeCommand(aJsonObject* cmd, int8_t toggle = -1);
 bool executeCommand(aJsonObject* cmd, int8_t toggle, itemCmd _itemCmd);
 itemCmd mapInt(int32_t arg, aJsonObject* map);
 unsigned long millisNZ(uint8_t shift=0);
+serialParamType  str2SerialParam(char * str);