ESP32 WROOM with ILI9486 parallel tft shield

[kiduino]

hi, I have a 320x480 3.5" ili9486 display, i beleive that it is probably made to fit uno/mega boards?

im using an esp32 wroom(not an esp32 UNO board). I cant find any posts that describe using an esp32 WROOM to get touch data from my tft, only ESP32 UNO board managing to get touch data.

is there any way of getting touch data from the ili9486 tft to my esp32 wroom? many similar discussions suggest using this library however i belive that library only works with esp32 uno boards not devkits like mine

[Bodmer]

The UNO format of the ESP32 boards are still available so that is the simplest route. There's nothing special about the capability of the UNO style ESP32 boards so other board types could be used with the same or equivalent GPIO allocations.

I have not used the touch library but it should work fine with the ESP32 providing the required number of GPIO are available.

[Bodmer]

I can't see where the problem is. As far as I can tell it should work, all the pins look good. Post a link to the display you are using.

The MCUfriend library should also run with those pin definitions and has some diagnostic sketches for the touch interface but it is not a library I am familiar with. David Prentice is very good at helping out on the Arduino forum though.

See here:
https://forum.arduino.cc/t/mcufriend-2-4-tft-pinout-where-are-the-touchscreen-signal-pins/496361/8

[Bodmer]

Library mentioned is here:
https://github.com/prenticedavid/MCUFRIEND_kbv

[kiduino]

https://www.amazon.co.uk/ALMOCN-digitizer-Compatible-Mega2560-Raspberry/dp/B094CGQ426/ref=sr_1_6?crid=8FI3ERA5VMLZ&keywords=3.5%22+tft&qid=1667929251&sprefix=3.5+tft%2Caps%2C97&sr=8-6
the exact tft im using

[kiduino]

come up with another possibility why its not working: my esp32 wroom board is really weird. it could just be printing errors, but pin 33 on the board is labelled 23, meaning that it looks like the board has two 23 pins. another thing that could be a printing error is that pin 36 is labelled "SP" and pin 39 is labelled "SM". i did some diagnosis on these pins to see if they work properly, starting by setting pin 36 and 39 as INPUT, then a simple sketch that prints "39 high" if 39 is digital read high or prints "36 high" if pin 36 is high.
when i attached 5v pin 39 it would read high, but occasional 36 would read high aswell. could this just be because the pins are very sensetive? or are they linked in some way. this combined with their weird pin labelling seems very odd

[kiduino]

actually im goint to guess its just because the pins are extremely sensetive as they can detect my finger as HIGH when i touch them

[kiduino]

hello, upon more examination i have found the issue that is stopping everything from working.
the display only works if pin 15 and 35 are NOT wired together. all the other wiring that you showed works fine.
if i wire 15 and 35 together, the display simply shows white and does not run any examples, any ideas on how to work around this, could a different pin be used? edit:
it also happens when wiring pin 4 to pin 39