Esp32 Display board

[Chadb]

HI I have an esp board with a display.

https://www.amazon.com/DIYmalls-ESP-WRO ... C94&sr=8-1

I have managed to get most everything working but the touch controller.
They are wired to :

TOUCH:
CTP_SDA.33
CTP_SCL.32
CTP_RST.25
CTP_INT.21 * This is shorted to gnd on my version.
You can cut the trace and wire it to R25 Pad.

33 and 32 do not exist in the pin configurations in flow code.
Any ideas?

Thanks,
Chad

[BenR]

Hi Chad,

32 is pin B0 and 33 is pin B1, hope this helps

This too might be interesting for you.
viewtopic.php?p=16701#p16701

[Chadb]

Thanks, I used those numbers and I still can't get anything out of the touch. Right now, I am just doing a sample sensor looking for a touch and if I get one I am trying to light a LED. It simulates ok, but I can't get anything out of the hardware. I have tried 100k 400k i2c rate, I am using i2c2 because 1 is used on a mcp23017. I have tried single ended and differential. I am not using the interrupt pin. My board has it hardwired to GND. That should give a 0x5d address. I have tried both. Still nothing.

Could you please take a look at the GT911 component?

Any other suggestions?
Thanks,
chad

[Chadb]

Bump.

[BenR]

Hi Chad,

I've ordered one so I'll investigate for you.

[Chadb]

Cool, The documentation sucks, so here is a head start.

LCD: ST7796
MOSI-A.13
MISO-A.12
CLK-A.14
CS-A.15
D/C-A.2
RST- N/A Tied to RST BTN PIN
LED BACKLIGHT -A.27

TOUCH: GT911
CTP_SDA.33 ==B1
CTP_SCL.32 ==B0
CTP_RST.25
CTP_INT.21 * This is shorted to board on my version.

SPEAKER sound -26

CN1 I2C:
SDA 21
SCL 22

Red LED: 4
Green LED 16
Blue LED 17
Photocell An6 / io 34

9cca7ccb42e9d558234bd64e2778e48083f8aaf8.jpeg (108.87 KiB) Viewed 5641 times

9d12174288359ed99dabe63ee449441ac1bb8848.png (365.63 KiB) Viewed 5641 times

f3d4b6fdac5d57c9de70c431d9e86881514e0b06.jpeg (77.52 KiB) Viewed 5641 times

[Chadb]

276e9c8c7acb41e081db9f407c0f677c958b093c.jpeg (115.76 KiB) Viewed 5641 times

[WingNut]

Interesting device. I wonder how hard it would be to integrate it into a display for home assistant

[BenR]

It's taken me all day to track down the cause but hopefully resolved for you now.

The latest GT911 component in the library updates should solve the issue.


Here's my working test program.

GLCD_Test_GT911.fcfx

(20.43 KiB) Downloaded 347 times

[Chadb]

Yep, that works, Even have the multitouch going. Thanks!!! What was wrong?

Chad