Module ESP32-2432S integrated with Annex

[AndyGadget]

This looks identical to the one you posted at the top of the thread but has the problems in Annex I detailed, although the factory test program worked.
This is the listing - https://www.aliexpress.com/item/1005006 ... 1802rbeHoE
(The ad is saying 3.5" but I realised it was 2.8" before I bought. I paid £2:50 for it.)

2432S028.jpg

[Oli]

Hi,

i have the same module, and the same problem, the touch is pressed to 1/4 left top aerea.
ST7789 #5

cost is 10,50€
https://de.aliexpress.com/item/1005006604267846.html

TouchScreen - Resistive
i get TOUCH.RAW -> read the touchscreen without calibration
touch.x -60 left to 600 midle,
touch.y -61 top to 340 midle,
touch outside this 1/4 display aerea is not response

The timing of the interface could be too fast before all values ​​are transmitted and the internal measurement of the IC is complete,

[cicciocb]

Hi,

i have the same module, and the same problem, the touch is pressed to 1/4 left top aerea.
ST7789 #5

cost is 10,50€
https://de.aliexpress.com/item/1005006604267846.html

TouchScreen - Resistive
i get TOUCH.RAW -> read the touchscreen without calibration
touch.x -60 left to 600 midle,
touch.y -61 top to 340 midle,
touch outside this 1/4 display aerea is not response

The timing of the interface could be too fast before all values ​​are transmitted and the internal measurement of the IC is complete,

I think it is a question of orientation.
In landscape should work, probably not in the other orientations

[AndyGadget]

Not that simple I'm afraid. I've tried it with the various configurations with the same result.

What Oli says rings a bell though. I can't find the reference now but I've seen it mentioned that the SPI bus for the touch needs to run below 2.5MHz for some screens.

[cicciocb]

Not that simple I'm afraid. I've tried it with the various configurations with the same result.

What Oli says rings a bell though. I can't find the reference now but I've seen it mentioned that the SPI bus for the touch needs to run below 2.5MHz for some screens.

The touch SPI is already at 2.5MHz

Code: [Local Link Removed for Guests]

// The XPT2046 requires a lower SPI clock rate of 2.5MHz so we define that here:
#define SPI_TOUCH_FREQUENCY  2500000

Have you configured the module as below ? :

image.png

[cicciocb]

I have also another module 2.4" that seems slightly different but it also works using another configuration :

image.png

In case of low sensitivity or part of the screen not working, you can play with the touchscreen resistive paramenters:
[Local Link Removed for Guests]

In particular you can try to lower the THRESHOLD and the AVERAGE

[AndyGadget]

I have also another module 2.4" that seems slightly different but it also works using another configuration :

image.png


In case of low sensitivity or part of the screen not working, you can play with the touchscreen resistive paramenters:
[Local Link Removed for Guests]

In particular you can try to lower the THRESHOLD and the AVERAGE

OK, not bus speed then.
I'm away on hols at the moment but i'll have a fiddle with the other parameters when I get back, but the part that does work works perfectly so maybe not a sensitivity issue.

[Oli]

With the sensitivity I tested unsuccessfully
The bus speed is ok, but how often the message is asked,
First the low values ​​will be carried, they arrive.
The IC is very simple, 8 bit it is not, Reverence voltage ok,
Timing remains to be checked

https://macsbug.wordpress.com/2022/08/1 ... -2432s028/

[cicciocb]

With the sensitivity I tested unsuccessfully
The bus speed is ok, but how often the message is asked,
First the low values ​​will be carried, they arrive.
The IC is very simple, 8 bit it is not, Reverence voltage ok,
Timing remains to be checked

If you have the capacitive touch the parameters have no effect.

Probably you must play with the touch orientation
[Local Link Removed for Guests]

try with TOUCH.INIT

[Oli]

I bought more modules
At Ali Choice for € 6.17
They are completely identical, resistance touch ic, like the photo,
But they work,
I will measure whether everything is correct with the power supply is correct.

But I observe that all several times about 6x booting up when switching on before they run stably. I don't load a program, just the start screen. Is that related to stable WiFi? Can you watch that too?