ST9720 LCD12864 using u8g2 library doesn't work

Projects Programming
1

Hello

I recently bought a LCD-screen with a ST9720 chip.
The screen does not have I2C so I have to use another library.
The only library working for me is the u8g2 library but I can't get the screen to show anything.
Would it be a solution to set the screen to SPI or are there any other solutions?

Thanks for helping out!

2

Please can you provide a link to the actual screen that you bought

The only library working for me is the u8g2 library but I can't get the screen to show anything.

Either it works (first half of the sentence) or it doesn't (second half of the sentence)

Which is it ?

3

This is the site where I bought the screen:

The library is working in terms of error messages.
All the previous libraries I used gave messages telling me that they were not compatible with the screen.
For example, the library that they recommended was 12864 but it is outdated and doesn't work anymore.