diff -r 000000000000 -r 88d965579617 components/u8g2/csrc/u8g2_input_value.c
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/components/u8g2/csrc/u8g2_input_value.c	Tue Oct 08 12:00:31 2019 +0200
@@ -0,0 +1,150 @@
+/*
+
+  u8g2_input_value.c
+  
+  Universal 8bit Graphics Library (https://github.com/olikraus/u8g2/)
+
+  Copyright (c) 2016, olikraus@gmail.com
+  All rights reserved.
+
+  Redistribution and use in source and binary forms, with or without modification, 
+  are permitted provided that the following conditions are met:
+
+  * Redistributions of source code must retain the above copyright notice, this list 
+    of conditions and the following disclaimer.
+    
+  * Redistributions in binary form must reproduce the above copyright notice, this 
+    list of conditions and the following disclaimer in the documentation and/or other 
+    materials provided with the distribution.
+
+  THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND 
+  CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, 
+  INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF 
+  MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE 
+  DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR 
+  CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 
+  SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 
+  NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; 
+  LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER 
+  CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, 
+  STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 
+  ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF 
+  ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.  
+  
+*/
+
+#include "u8g2.h"
+
+/*
+  return:
+    0: value is not changed (HOME/Break Button pressed)
+    1: value has been updated
+*/
+
+uint8_t u8g2_UserInterfaceInputValue(u8g2_t *u8g2, const char *title, const char *pre, uint8_t *value, uint8_t lo, uint8_t hi, uint8_t digits, const char *post)
+{
+  uint8_t line_height;
+  uint8_t height;
+  u8g2_uint_t pixel_height;
+  u8g2_uint_t  y, yy;
+  u8g2_uint_t  pixel_width;
+  u8g2_uint_t  x, xx;
+  
+  uint8_t local_value = *value;
+  //uint8_t r; /* not used ??? */
+  uint8_t event;
+
+  /* only horizontal strings are supported, so force this here */
+  u8g2_SetFontDirection(u8g2, 0);
+
+  /* force baseline position */
+  u8g2_SetFontPosBaseline(u8g2);
+  
+  /* calculate line height */
+  line_height = u8g2_GetAscent(u8g2);
+  line_height -= u8g2_GetDescent(u8g2);
+  
+  
+  /* calculate overall height of the input value box */
+  height = 1;	/* value input line */
+  height += u8x8_GetStringLineCnt(title);
+
+  /* calculate the height in pixel */
+  pixel_height = height;
+  pixel_height *= line_height;
+
+
+  /* calculate offset from top */
+  y = 0;
+  if ( pixel_height < u8g2_GetDisplayHeight(u8g2)  )
+  {
+    y = u8g2_GetDisplayHeight(u8g2);
+    y -= pixel_height;
+    y /= 2;
+  }
+  
+  /* calculate offset from left for the label */
+  x = 0;
+  pixel_width = u8g2_GetUTF8Width(u8g2, pre);
+  pixel_width += u8g2_GetUTF8Width(u8g2, "0") * digits;
+  pixel_width += u8g2_GetUTF8Width(u8g2, post);
+  if ( pixel_width < u8g2_GetDisplayWidth(u8g2) )
+  {
+    x = u8g2_GetDisplayWidth(u8g2);
+    x -= pixel_width;
+    x /= 2;
+  }
+  
+  /* event loop */
+  for(;;)
+  {
+    u8g2_FirstPage(u8g2);
+    do
+    {
+      /* render */
+      yy = y;
+      yy += u8g2_DrawUTF8Lines(u8g2, 0, yy, u8g2_GetDisplayWidth(u8g2), line_height, title);
+      xx = x;
+      xx += u8g2_DrawUTF8(u8g2, xx, yy, pre);
+      xx += u8g2_DrawUTF8(u8g2, xx, yy, u8x8_u8toa(local_value, digits));
+      u8g2_DrawUTF8(u8g2, xx, yy, post);
+    } while( u8g2_NextPage(u8g2) );
+    
+#ifdef U8G2_REF_MAN_PIC
+      return 0;
+#endif
+    
+    for(;;)
+    {
+      event = u8x8_GetMenuEvent(u8g2_GetU8x8(u8g2));
+      if ( event == U8X8_MSG_GPIO_MENU_SELECT )
+      {
+	*value = local_value;
+	return 1;
+      }
+      else if ( event == U8X8_MSG_GPIO_MENU_HOME )
+      {
+	return 0;
+      }
+      else if ( event == U8X8_MSG_GPIO_MENU_NEXT || event == U8X8_MSG_GPIO_MENU_UP )
+      {
+	if ( local_value >= hi )
+	  local_value = lo;
+	else
+	  local_value++;
+	break;
+      }
+      else if ( event == U8X8_MSG_GPIO_MENU_PREV || event == U8X8_MSG_GPIO_MENU_DOWN )
+      {
+	if ( local_value <= lo )
+	  local_value = hi;
+	else
+	  local_value--;
+	break;
+      }        
+    }
+  }
+  
+  /* never reached */
+  //return r;  
+}