[SOLVED] Adapting MenuBackend library to use strings in PROGMEM

Using Arduino Programming Questions
2

There are two things you're going to have to tackle. First, all your string definitions are going to have to be changed to place them in program space:

  :
#define TEXT_FINISHED                          "fertig"
  :

becomes

#include <avr/pgmspace.h
  
  :
#define TEXT_FINISHED                          PSTR("fertig")
  :

Then, when you go to send the string to the LCD, your're going to have to have a jacket function to lcd.print() that understands the PROGMEM string.

void lcd_print_P(const PROGMEM char *s)
{
  uint8_t c;
  while ((c = pgm_read_byte_near(s++)) != 0)
     lcd.print(c);
}

And where you write to the LCD, thats going to use your spiffy new jacket function:

    clear_second_line();
    lcd.setCursor(0,1);
    lcd.print(TEXT_PICTURETAKEN);

becomes

    clear_second_line();
    lcd.setCursor(0,1);
    lcd_print_P(TEXT_PICTURETAKEN);

This is a rough approximation, but should give you a reasonable idea what needs doing.