When I try to update using the firmware tool kit from the geeetech web site and the following file https://www.geeetech.com/download.html?version_id=238 .
The toolkit firmfware connect correctly to the printer but then I have the following error message : Please refer to enclosure below
Firmware used https://www.geeetech.com/download.html?version_id=238 & second test with https://www.geeetech.com/download.html?version_id=73
The I tryed the procedure mentionned in this topic (viewtopic.php?f=13&t=17181) using the arduino app and when I want to "televerser" the following marlin file I have this error message ?
Firmware used : viewtopic.php?f=20&t=17046 : 5.Geeetech A20M with LCD12864 - A20M_Marlin-1.1.x12864.zip
Marlin:45:14: error: U8glib.h: No such file or directory
#include <U8glib.h> // library for graphics LCD by Oli Kraus (https://github.com/olikraus/U8glib_Arduino)
^~~~~~~~~~
compilation terminated.
exit status 1
U8glib.h: No such file or directory
Can you please help me to solve this problem ? From one way or another ?
Thanks for your help