diff --git a/include/utils/StringUtils.h b/include/utils/StringUtils.h
index 5a1edc41..da9468cb 100644
--- a/include/utils/StringUtils.h
+++ b/include/utils/StringUtils.h
@@ -40,4 +40,4 @@ boolean isDigitDotCommaStr(const String& str);
 
 String prettyBytes(size_t size);
 
-String uint64ToString(uint64_t input);
+String uint64ToString(uint64_t input, uint8_t base = 10);
diff --git a/src/modules/display/Lcd2004/Lcd2004.cpp b/src/modules/display/Lcd2004/Lcd2004.cpp
index 74f3080d..968bed0b 100644
--- a/src/modules/display/Lcd2004/Lcd2004.cpp
+++ b/src/modules/display/Lcd2004/Lcd2004.cpp
@@ -15,16 +15,17 @@ class Lcd2004 : public IoTItem {
     String _id2show;
     String _descr;
     int _prevStrSize;
+    String _addr;
 
     bool _isShow = true;    // экран показывает
 
    public:
     Lcd2004(String parameters) : IoTItem(parameters) {
-        String addr, size, xy;
+        String size, xy;
         _prevStrSize = 0;
 
-        jsonRead(parameters, "addr", addr);
-        if (addr == "") {
+        jsonRead(parameters, "addr", _addr);
+        if (_addr == "") {
             scanI2C();
             return;
         }
@@ -33,7 +34,7 @@ class Lcd2004 : public IoTItem {
         int w = selectFromMarkerToMarker(size, ",", 0).toInt();  //количество столбцов
         int h = selectFromMarkerToMarker(size, ",", 1).toInt();  //количество строк
         if (LCDI2C == nullptr) {                                 //инициализации экрана еще не было
-            LCDI2C = new LiquidCrystal_I2C(hexStringToUint8(addr), w, h);
+            LCDI2C = new LiquidCrystal_I2C(hexStringToUint8(_addr), w, h);
             if (LCDI2C != nullptr) {
                 LCDI2C->init();
             }
@@ -62,6 +63,8 @@ class Lcd2004 : public IoTItem {
             //LCDI2C->print("Helloy,Manager 404 !");
             //Serial.printf("ffff %s\n", _id2show);
             _prevStrSize = tmpStr.length();
+        } else {
+            scanI2C();
         }
     }
 
diff --git a/src/modules/exec/Mcp23017/Mcp23017.cpp b/src/modules/exec/Mcp23017/Mcp23017.cpp
index 657a3fde..b5fc7f06 100644
--- a/src/modules/exec/Mcp23017/Mcp23017.cpp
+++ b/src/modules/exec/Mcp23017/Mcp23017.cpp
@@ -3,8 +3,6 @@
 #include "classes/IoTGpio.h"
 #include <Adafruit_MCP23X17.h>
 
-void scanI2C();
-
 class Mcp23017Driver : public IoTGpio {
    private:
     Adafruit_MCP23X17 _mcp;
@@ -39,14 +37,14 @@ class Mcp23017Driver : public IoTGpio {
 class Mcp23017 : public IoTItem {
    private:
     Mcp23017Driver* _driver;
+    String _addr;
 
    public:
     Mcp23017(String parameters) : IoTItem(parameters) {
         _driver = nullptr;
         
-        String addr;
-        jsonRead(parameters, "addr", addr);
-        if (addr == "") {
+        jsonRead(parameters, "addr", _addr);
+        if (_addr == "") {
             scanI2C();
             return;
         }
@@ -58,10 +56,15 @@ class Mcp23017 : public IoTItem {
             return;
         }
         
-        _driver = new Mcp23017Driver(index, addr);        
+        _driver = new Mcp23017Driver(index, _addr);        
     }
 
-    void doByInterval() {}
+    void doByInterval() {
+        if (_addr == "") {
+            scanI2C();
+            return;
+        }
+    }
 
     //возвращает ссылку на экземпляр класса Mcp23017Driver
     IoTGpio* getGpioDriver() {
diff --git a/src/modules/exec/Pcf8574/Pcf8574.cpp b/src/modules/exec/Pcf8574/Pcf8574.cpp
index d5403752..962feea5 100644
--- a/src/modules/exec/Pcf8574/Pcf8574.cpp
+++ b/src/modules/exec/Pcf8574/Pcf8574.cpp
@@ -93,14 +93,14 @@ class Pcf8574Driver : public IoTGpio {
 class Pcf8574 : public IoTItem {
    private:
     Pcf8574Driver* _driver;
+    String _addr;
 
    public:
     Pcf8574(String parameters) : IoTItem(parameters) {
         _driver = nullptr;
         
-        String addr;
-        jsonRead(parameters, "addr", addr);
-        if (addr == "") {
+        jsonRead(parameters, "addr", _addr);
+        if (_addr == "") {
             scanI2C();
             return;
         }
@@ -112,10 +112,15 @@ class Pcf8574 : public IoTItem {
             return;
         }
         
-        _driver = new Pcf8574Driver(index, addr);        
+        _driver = new Pcf8574Driver(index, _addr);        
     }
 
-    void doByInterval() {}
+    void doByInterval() {
+        if (_addr == "") {
+            scanI2C();
+            return;
+        }
+    }
 
     //возвращает ссылку на экземпляр класса Pcf8574Driver
     IoTGpio* getGpioDriver() {
diff --git a/src/utils/I2CUtils.cpp b/src/utils/I2CUtils.cpp
index 9d3f9032..a8c643c6 100644
--- a/src/utils/I2CUtils.cpp
+++ b/src/utils/I2CUtils.cpp
@@ -4,32 +4,29 @@
 void scanI2C() {
     byte error, address;
     int nDevices;
- 
-    Serial.println("Scanning...");
+    String message = "";
  
     nDevices = 0;
-    for(address = 8; address < 127; address++ ){
+    for(address = 8; address < 127; address++ ) {
         Wire.beginTransmission(address);
         error = Wire.endTransmission();
  
         if (error == 0){
-            Serial.print("I2C device found at address 0x");
-            if (address<16)
-                Serial.print("0");
-            Serial.print(address,HEX);
-            Serial.println(" !");
+            message += "I2C device found at address 0x";
+            message += uint64ToString(address, 16);
+            message += " !";
  
             nDevices++;
         }
         else if (error==4) {
-            Serial.print("Unknow error at address 0x");
-            if (address<16)
-                Serial.print("0");
-            Serial.println(address,HEX);
+            message += "Unknow error at address 0x";
+            message += uint64ToString(address, 16);
         } 
     }
     if (nDevices == 0)
-        Serial.println("No I2C devices found\n");
+        message += "No I2C devices found\n";
     else
-        Serial.println("done\n");
+        message += "done\n";
+
+    SerialPrint("i", "I2C Scaner", message);
 }
\ No newline at end of file
diff --git a/src/utils/StringUtils.cpp b/src/utils/StringUtils.cpp
index 0a2b06ac..a8d4ee3b 100644
--- a/src/utils/StringUtils.cpp
+++ b/src/utils/StringUtils.cpp
@@ -183,9 +183,8 @@ String prettyBytes(size_t size) {
         return String(size / 1024.0 / 1024.0 / 1024.0) + "GB";
 }
 
-String uint64ToString(uint64_t input) {
+String uint64ToString(uint64_t input, uint8_t base) {
     String result = "";
-    uint8_t base = 10;
 
     do {
         char c = input % base;