diff --git a/ubitx_20/ubitx.h b/ubitx_20/ubitx.h
index 734c4d0..d1ca476 100644
--- a/ubitx_20/ubitx.h
+++ b/ubitx_20/ubitx.h
@@ -14,6 +14,9 @@
    You should have received a copy of the GNU General Public License
    along with this program.  If not, see <http://www.gnu.org/licenses/>.
 **************************************************************************/
+#ifndef _UBITX_HEADER__
+#define _UBITX_HEADER__
+
 #include <Arduino.h>  //for Linux, On Linux it is case sensitive.
 
 //==============================================================================
@@ -172,3 +175,7 @@ extern void SendWSPRManage(void);
 extern char byteToChar(byte srcByte);
 extern void DisplayCallsign(byte callSignLength);
 extern void DisplayVersionInfo(const char* fwVersionInfo);
+
+#endif    //end of if header define
+
+
diff --git a/ubitx_20/ubitx_eemap.h b/ubitx_20/ubitx_eemap.h
index 2bdb32d..200ba44 100644
--- a/ubitx_20/ubitx_eemap.h
+++ b/ubitx_20/ubitx_eemap.h
@@ -15,6 +15,9 @@
    You should have received a copy of the GNU General Public License
    along with this program.  If not, see <http://www.gnu.org/licenses/>.
 **************************************************************************/
+#ifndef _UBITX_EEPOM_HEADER__
+#define _UBITX_EEPOM_HEADER__
+
 //==============================================================================
 // Factory-shipped EEProm address
 // (factory Firmware)
@@ -125,3 +128,5 @@
 #define CW_DATA_OFSTADJ       CW_AUTO_DATA - USER_CALLSIGN_DAT   //offset adjust for ditect eeprom to lcd (basic offset is USER_CALLSIGN_DAT
 #define CW_STATION_LEN        1023  //value range : 4 ~ 30
 
+#endif    //end of if header define
+
diff --git a/ubitx_20/ubitx_lcd.h b/ubitx_20/ubitx_lcd.h
new file mode 100644
index 0000000..bc477d3
--- /dev/null
+++ b/ubitx_20/ubitx_lcd.h
@@ -0,0 +1,64 @@
+/*************************************************************************
+  header file for LCD by KD8CEC
+-----------------------------------------------------------------------------
+   This program is free software: you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation, either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <http://www.gnu.org/licenses/>.
+**************************************************************************/
+#ifndef _UBITX_LCD_HEADER__
+#define _UBITX_LCD_HEADER__
+
+//Common Defines *********************************************************
+#define LCD_CLEARDISPLAY 0x01
+#define LCD_RETURNHOME 0x02
+#define LCD_ENTRYMODESET 0x04
+#define LCD_DISPLAYCONTROL 0x08
+#define LCD_CURSORSHIFT 0x10
+#define LCD_FUNCTIONSET 0x20
+#define LCD_SETCGRAMADDR 0x40
+#define LCD_SETDDRAMADDR 0x80
+
+// flags for display entry mode
+#define LCD_ENTRYRIGHT 0x00
+#define LCD_ENTRYLEFT 0x02
+#define LCD_ENTRYSHIFTINCREMENT 0x01
+#define LCD_ENTRYSHIFTDECREMENT 0x00
+
+// flags for display on/off control
+#define LCD_DISPLAYON 0x04
+#define LCD_DISPLAYOFF 0x00
+#define LCD_CURSORON 0x02
+#define LCD_CURSOROFF 0x00
+#define LCD_BLINKON 0x01
+#define LCD_BLINKOFF 0x00
+
+// flags for display/cursor shift
+#define LCD_DISPLAYMOVE 0x08
+#define LCD_CURSORMOVE 0x00
+#define LCD_MOVERIGHT 0x04
+#define LCD_MOVELEFT 0x00
+
+// flags for function set
+#define LCD_8BITMODE 0x10
+#define LCD_4BITMODE 0x00
+#define LCD_2LINE 0x08
+#define LCD_1LINE 0x00
+#define LCD_5x10DOTS 0x04
+#define LCD_5x8DOTS 0x00
+
+// flags for backlight control
+#define LCD_BACKLIGHT 0x08
+#define LCD_NOBACKLIGHT 0x00
+
+#endif    //end of if header define
+
+
diff --git a/ubitx_20/ubitx_lcd_1602.ino b/ubitx_20/ubitx_lcd_1602.ino
index 46e50a0..4315da4 100644
--- a/ubitx_20/ubitx_lcd_1602.ino
+++ b/ubitx_20/ubitx_lcd_1602.ino
@@ -21,48 +21,7 @@
 
 **************************************************************************/
 #include "ubitx.h"
-
-//Common Defines *********************************************************
-#define LCD_CLEARDISPLAY 0x01
-#define LCD_RETURNHOME 0x02
-#define LCD_ENTRYMODESET 0x04
-#define LCD_DISPLAYCONTROL 0x08
-#define LCD_CURSORSHIFT 0x10
-#define LCD_FUNCTIONSET 0x20
-#define LCD_SETCGRAMADDR 0x40
-#define LCD_SETDDRAMADDR 0x80
-
-// flags for display entry mode
-#define LCD_ENTRYRIGHT 0x00
-#define LCD_ENTRYLEFT 0x02
-#define LCD_ENTRYSHIFTINCREMENT 0x01
-#define LCD_ENTRYSHIFTDECREMENT 0x00
-
-// flags for display on/off control
-#define LCD_DISPLAYON 0x04
-#define LCD_DISPLAYOFF 0x00
-#define LCD_CURSORON 0x02
-#define LCD_CURSOROFF 0x00
-#define LCD_BLINKON 0x01
-#define LCD_BLINKOFF 0x00
-
-// flags for display/cursor shift
-#define LCD_DISPLAYMOVE 0x08
-#define LCD_CURSORMOVE 0x00
-#define LCD_MOVERIGHT 0x04
-#define LCD_MOVELEFT 0x00
-
-// flags for function set
-#define LCD_8BITMODE 0x10
-#define LCD_4BITMODE 0x00
-#define LCD_2LINE 0x08
-#define LCD_1LINE 0x00
-#define LCD_5x10DOTS 0x04
-#define LCD_5x8DOTS 0x00
-
-// flags for backlight control
-#define LCD_BACKLIGHT 0x08
-#define LCD_NOBACKLIGHT 0x00
+#include "ubitx_lcd.h"
 
 //========================================================================
 //Begin of TinyLCD Library by KD8CEC
diff --git a/ubitx_20/ubitx_lcd_1602Dual.ino b/ubitx_20/ubitx_lcd_1602Dual.ino
index 8c698ac..e06a0cc 100644
--- a/ubitx_20/ubitx_lcd_1602Dual.ino
+++ b/ubitx_20/ubitx_lcd_1602Dual.ino
@@ -21,48 +21,7 @@
 
 **************************************************************************/
 #include "ubitx.h"
-
-//Common Defines *********************************************************
-#define LCD_CLEARDISPLAY 0x01
-#define LCD_RETURNHOME 0x02
-#define LCD_ENTRYMODESET 0x04
-#define LCD_DISPLAYCONTROL 0x08
-#define LCD_CURSORSHIFT 0x10
-#define LCD_FUNCTIONSET 0x20
-#define LCD_SETCGRAMADDR 0x40
-#define LCD_SETDDRAMADDR 0x80
-
-// flags for display entry mode
-#define LCD_ENTRYRIGHT 0x00
-#define LCD_ENTRYLEFT 0x02
-#define LCD_ENTRYSHIFTINCREMENT 0x01
-#define LCD_ENTRYSHIFTDECREMENT 0x00
-
-// flags for display on/off control
-#define LCD_DISPLAYON 0x04
-#define LCD_DISPLAYOFF 0x00
-#define LCD_CURSORON 0x02
-#define LCD_CURSOROFF 0x00
-#define LCD_BLINKON 0x01
-#define LCD_BLINKOFF 0x00
-
-// flags for display/cursor shift
-#define LCD_DISPLAYMOVE 0x08
-#define LCD_CURSORMOVE 0x00
-#define LCD_MOVERIGHT 0x04
-#define LCD_MOVELEFT 0x00
-
-// flags for function set
-#define LCD_8BITMODE 0x10
-#define LCD_4BITMODE 0x00
-#define LCD_2LINE 0x08
-#define LCD_1LINE 0x00
-#define LCD_5x10DOTS 0x04
-#define LCD_5x8DOTS 0x00
-
-// flags for backlight control
-#define LCD_BACKLIGHT 0x08
-#define LCD_NOBACKLIGHT 0x00
+#include "ubitx_lcd.h"
 
 //========================================================================
 //Begin of I2CTinyLCD Library for Dual LCD by KD8CEC
diff --git a/ubitx_20/ubitx_lcd_2004.ino b/ubitx_20/ubitx_lcd_2004.ino
index f895a8b..d470db7 100644
--- a/ubitx_20/ubitx_lcd_2004.ino
+++ b/ubitx_20/ubitx_lcd_2004.ino
@@ -21,48 +21,7 @@
 
 **************************************************************************/
 #include "ubitx.h"
-
-//Common Defines *********************************************************
-#define LCD_CLEARDISPLAY 0x01
-#define LCD_RETURNHOME 0x02
-#define LCD_ENTRYMODESET 0x04
-#define LCD_DISPLAYCONTROL 0x08
-#define LCD_CURSORSHIFT 0x10
-#define LCD_FUNCTIONSET 0x20
-#define LCD_SETCGRAMADDR 0x40
-#define LCD_SETDDRAMADDR 0x80
-
-// flags for display entry mode
-#define LCD_ENTRYRIGHT 0x00
-#define LCD_ENTRYLEFT 0x02
-#define LCD_ENTRYSHIFTINCREMENT 0x01
-#define LCD_ENTRYSHIFTDECREMENT 0x00
-
-// flags for display on/off control
-#define LCD_DISPLAYON 0x04
-#define LCD_DISPLAYOFF 0x00
-#define LCD_CURSORON 0x02
-#define LCD_CURSOROFF 0x00
-#define LCD_BLINKON 0x01
-#define LCD_BLINKOFF 0x00
-
-// flags for display/cursor shift
-#define LCD_DISPLAYMOVE 0x08
-#define LCD_CURSORMOVE 0x00
-#define LCD_MOVERIGHT 0x04
-#define LCD_MOVELEFT 0x00
-
-// flags for function set
-#define LCD_8BITMODE 0x10
-#define LCD_4BITMODE 0x00
-#define LCD_2LINE 0x08
-#define LCD_1LINE 0x00
-#define LCD_5x10DOTS 0x04
-#define LCD_5x8DOTS 0x00
-
-// flags for backlight control
-#define LCD_BACKLIGHT 0x08
-#define LCD_NOBACKLIGHT 0x00
+#include "ubitx_lcd.h"
 
 //========================================================================
 //Begin of TinyLCD Library by KD8CEC