Ok, i got it to work with the python script to extract the software. I gave the jedec ID you mentioned and was able to download it.
But now I have the situation that the Windows app (I dont have and arduino unfortunately) keeps telling me "Error. Unknown firmware".

Hi, yes you are right. It is 3509.
I will check later If modifying the code will work.

But thank you very much until now

Ah one remark: I am using the Python Script. Can you tell me what I have to change here?

Hi, I recently started my GBZ project and I wanted to flash my display too. Unfortunately I get the message Resetting device... Entering ISP mode... Reading chip data... JEDEC ID: 0x5e6013 Cannot setup chip commands! The flash chip id is unknown. and nothing happens. The LCD seems to be a KeDei vers...