` and ~ keys and Keyboard . does not work about ps2keyadvanced HOT 1 CLOSED

I think you have a misunderstanding of what codes are reurned and how the library works.

Many many questions, as these work correctly for years on keyboards I and other uders have used, this sort of problem would have been reported years ago.

Questions

1. What board are you using?
2. What nationality keyboard do you have?
3. What is SCROLL LOCK doing Scroll Lock overrides Num Lock on the numeric keypad
4. What do you MEAN by cannot get to work the code that SHOULD be returned is NOT the same as the main keyboard area DOT ket (PS2_KEY_DOT) that is to distinguish the keys. Just like keys 0-9 and Numeric Keypad 0-9 return DIFFERENT codes.
5. You do realise the Keycode for a key returned from the keyboard has many codes
   • Scan code sequence for make and brealk and dependant on other modes
   • PS2KeyAdvanced Keycode that defines the actual key
   • ASCII/UTF-8 code for common string/char representation for normal strings that more than one key could produce

If you want translation to ASCII or UTF-8 you NEED PS2KeyMap library AS WELL!!!
This is standard Arduino IDE download from Library Manager.

To convert all keys on ANY language keyboard to ASCII/UTF-8 requires translation and mapping using PS2KeyMap

from ps2keyadvanced.