ILI9488 3.5 inch Sunlight Readable IPS on ESP32

[Florian-L]

Hello! I have this display: https://de.aliexpress.com/item/32829704426.html
It should be the variant "IPS ILI9488 Touch".
I have wired it up according to "Setup16_ILI9488_Parallel.h". However, the display has no pin labeled "DC". I have tried the "RS" pin, as I found someone else apparently has done that successfully.
But my display remains black, even though I can see the backlight is on.
I have verified my settings with "Read_User_Setup". When I try th "TFT_ReadWrite_Test", all tests return
Pixel value read = 0
ERROR ^^^^
Does anyone have any ideas what I could try to make it work?
Regards,
Florian

[Florian-L]

Ok, I guess I need to do something with the "IM" pins? But what?

[Florian-L]

I probably have a hardware issue. Or I am just lacking proper undestanding?
I connected IM0 and IM1 to 3.3v to set the display to 8 bit bus mode, and now it displays something, but seems to crash right away. Here is a screenshot of the Colour_Test. The ESP32 is fine, it seems to be the display that is crashed.

[Bodmer]

I am guessing the vendor sent you a display with a different driver. The markings look like this one on the web link above, which is has an R61529 driver:

[Bodmer]

Incidentally, the R61529 chip is not supported by this library.

[Florian-L]

By the way, thanks for all your effort!

[Florian-L]

Ok, thanks. I guess I'm giving up on this display then.

[Bodmer]

It is almost working. It appears the initialisation is failing and not all pixel data is being recognised. Keep connections short, especially 0V (GND) and try reducing the SPI clock rate in the setup file to 10MHz.

[dadyeah]

I'm also struggling to get this display (ILI9488 sunlight readable) to work in SPI 3 wire mode,
If anyone has succeeded I would appreciate any info

[dexter323i]

@dadyeah are you still working on this project? This display inded has R61529 driver, and it can work with TFT_eSPI library, in 8 bit parallel modee. Use this PR: #2715