/home/terminusest/Arduino/epd4in2_V2/epd4in2_V2.cpp:498:6: error: prototype for 'void Epd::Set_4GrayDisplay(const char*, int, int, int, int)' does not match any in class 'Epd'
void Epd::Set_4GrayDisplay(const char *Image, int x, int y, int w, int l)
^~~
In file included from /home/terminusest/Arduino/epd4in2_V2/epd4in2_V2.cpp:28:0:
/home/terminusest/Arduino/epd4in2_V2/epd4in2_V2.h:67:10: error: candidate is: void Epd::Set_4GrayDisplay(const unsigned char*, int, int, int, int)
void Set_4GrayDisplay(const unsigned char *Image, int x, int y, int w, int l);
^~~~~~~~~~~~~~~~
/home/terminusest/Arduino/epd4in2_V2/epd4in2_V2.cpp: In member function 'int Epd::Init_4Gray()':
/home/terminusest/Arduino/epd4in2_V2/epd4in2_V2.cpp:213:1: warning: control reaches end of non-void function [-Wreturn-type]
}
^
Using library SPI at version 1.0 in folder: /home/terminusest/.arduino15/packages/arduino/hardware/avr/1.8.6/libraries/SPI
exit status 1
Compilation error: prototype for 'void Epd::Set_4GrayDisplay(const char*, int, int, int, int)' does not match any in class 'Epd'