Example with touch... not working?

[inakiarredondo]

Has anyone managed to get the example-with-touch to work? (with Lilygo T-Display-S3 Touch version)
Logs show this message: "[E][lilygo_tdisplay_s3.touchscreen:069]: Failed to communicate!" (8 times in a row, each time I touch the screen)
Any advice? Thank you.

[guillempages]

I haven't seen that; for me it was working until I updated to the latest dev.

Currently (with latest dev; which will be released with ESPHome 2023.12), the touchscreen component cannot even be compiled :-(

Working on that, but no ETA yet

[guillempages]

The base touchscreen component was changed, and all external touchscreen components need some reworking.

I've got it to compile, but the touch coordinates are completely bonkers. Will keep looking.

[guillempages]

Not looking good... I've got it working if I don't set the display rotation, but as soon as I set rotation 90 or 270, the y coordinates get halved (i.e. from 0-90 instead of 0-170).

On the plus side of things, there is a PR on the official ESPHome repo (esphome/esphome#5941) that adds touchscreen functionality for exactly this same touch controller. And it's a PR by someone who was involved on the touch/display discussions that are causing the problem now.

So there is a chance, that official support for this touch screen is coming into ESPHome core "soon"

[inakiarredondo]

Thank you for your answer.
How did you do to make it working just don't setting the display rotation? Just removing that line doesn't make any change for me...

PS: Fingers crossed for the official support "soon".

[guillempages]

To make the "t-display-s3 touchscreen" work, I had to do many changes in the code, that I haven't pushed yet. The PR I mentioned above works "out-of-the-box", if the display rotation is 0 (i.e. not set).

external_components:
  - source: github://pr#5941
    components: [cst816]

touchscreen:
  - platform: cst816
    display: disp
    interrupt_pin: 16
    id: my_touchscreen
    on_touch:
      - lambda: |-
         auto touch_point = id(touch_all).get_touches()[0];
         ESP_LOGI("tdisplays3-touch", "Touchdown: x:%d, y:%d",
           touch_point.x,
           touch_point.y
         );

If I change the display rotation, then the touch coordinates are just wrong 😢

[inakiarredondo]

Could you share the full code (for me to try it)?
Thanks!

[guillempages]

@inakiarredondo I've created a PR (#50) that should fix the compilation issues with 2023.12

Whether this also fixes the "Failed to communicate" issue you originally mentioned, I cannot tell, since I'm not seeing this (nor was seeing it before). But it is probably worth a try (it is actually a must, if you upgraded to ESPHome 2023.12.0 or later)

[inakiarredondo]

Now, once updated to ESPHome 2023 12.3, I get this warning
Couldn't find any component that can be used for 'display::Display'. Are you missing a hub declaration?
when editing, highlighting tdisplays3 on this section:

touchscreen:
  - platform: tdisplays3
    interrupt_pin: 16
    address: 0x15
    ...

[guillempages]

Yes, with 2023.12.0 there were some changes done to the touchscreen base component, that in turn required changes to the implementations.

That's what #50 should fix, but somehow it does not get through CI, so we cannot merge it.
I'm also afk for two weeks, so unfortunately I cannot look into that at the moment.

You might want to take a look at that PR; if I am not mistaken I wrote a comment on how to use that (you need to add @<branch> to the external component, but I can't tell you the exact name of the branch)

[guillempages]

@inakiarredondo The needed PR has been merged now. Can you try without the @branch part, and see if it is now working for you? Then we could close this issue

[inakiarredondo]

Sorry for the delay.

Yes, I've tried without the @Branch part, with ESPHome 2023.12.5 and also with 2023.12.7 ...but the "Failed to communicate!" keeps arising on the logs.

Iñaki

[raphbag]

Hello, I have the same problem with this error : "[lilygo_tdisplay_s3.touchscreen:082]: Failed to communicate!" when I touch the screen with ESPHome 2024.4.1.
Is there any news about this ?

[raphbag]

I finally solved my problem.
I had just reversed the sda and scl pin which is not the right one on the doc image (and the right one on your example).