My point is use 800x480 screen. I suppose that simple menu will work fine on “any” device, but at one screen I must place 800x480 picture. How fast LVGL can do it?. Will be fine if I decode jpg/png from flash or place some external flash who will keep bmp?- I think that it also will be not speedy. If they can draw it in 200-300ms then will be enough for me.
I consider to use some cheap and fast ARM M7 device, find some screen with SPI interface and use DMA
In fact, I misunderstand you. So I have first dev board to buy. Hmmm, probably I no need nothing more, It’s cheap and scalable trough external flash on qspi. I can burn it by many bmp who will be fast.
Do you want to develop a device or do you just search for a fast single device project?
for a fast project you can have a look on the LVGL Certified boards: Board Certification Program | From idea to product.
Not sure how complex your system is and how skilled you are, a quick solution can be to use a Nextion Screen but as far as i know you can not use lvgl with it only their own gui editor.
It’s (small) comercial topic, so i must find solution who is available and in good price. Each subsequent sentence who I read about S2/S3 tell me that it can be good solution. Also I not touch ESP in last 5 years so it’s good time to play with this. I order some devboard and I will try to check it when it comes.