The new display definition work ok with version 2.3.3 however I can't get the serial channel working from the display. If I set the device type to ESP32S3USBOTG the serial channel works fine. Any idea why the serial channel does not work with the proper Waveshare ESP32 S3 Display 1.28 ??
Which board did you exactly select in the IDE?
The board is the:-
Waveshare ESP32S3 Touch LCD 128"
In the Arduino.h definition the description is:-
`#define USB_VID 0x1A86
#define USB_PID 0x55D3
#define USB_MANUFACTURER "Waveshare"
#define USB_PRODUCT "ESP32-S3 Touch LCD 1.28"
#define USB_SERIAL "" // Empty string for MAC address`
Forgot to say
OS is MacOS Sequoia 15.1 on a MacBook Pro M2 Pro.
Note in advance: I do not have your board so can't test.
If "Waveshare ESP32S3 Touch LCD 128" is the board that you selected this might be caused by the following line in boards.txt which, to my knowledge, indicates that the CDC is used for serial prints and not the WCH chip (I could not find vid/pid 1A86/55D3 on the web).
waveshare_esp32s3_touch_lcd_128.build.cdc_on_boot=1
What you can try is to change it to
waveshare_esp32s3_touch_lcd_128.build.cdc_on_boot=0
Note: make a backup of the file.
To find where that boards.txt is, enable verbose output during compilation under file/preferences in the IDE. Compile a code and check the first few lines of the output.
I'm not a Mac user, this is the output for Windows.
FQBN: esp32:esp32:esp32s2
Using board 'esp32s2' from platform in folder: C:\Users\bugge\AppData\Local\Arduino15\packages\esp32\hardware\esp32\3.0.7
Using core 'esp32' from platform in folder: C:\Users\bugge\AppData\Local\Arduino15\packages\esp32\hardware\esp32\3.0.7
- Close the IDE.
- Navigate to the directory that you find (above it the directory is C:\Users\bugge\AppData\Local\Arduino15\packages\esp32\hardware\esp32\3.0.7) and open the file boards.txt with a normal text editor.
- Search for
Waveshare ESP32S3 Touch LCD 128. You will findwaveshare_esp32s3_touch_lcd_128.name=Waveshare ESP32S3 Touch LCD 128. - Scroll a bit down (you can also straight away search for the line that need modification) and find the line
waveshare_esp32s3_touch_lcd_128.build.cdc_on_boot=1and change it towaveshare_esp32s3_touch_lcd_128.build.cdc_on_boot=0. - Save the file.
Next you need to find the directory arduino-ide on your system; I can not tell you where it is. The content will look like
Delete that directory (or its content) and start the IDE; it's safe to delete that directory, if in doubt make a backup. Upload your problematic code and check if you now get serial output.
Note:
Changes that you make to boards.txt will be wiped when you downgrade/upgrade the board package.
It looks like it is the WCH CH343:
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I need to improve my search skills 
Similarly, ESP32C3 boards come in two types: with CDC and with CH-343 USB-UART
Tried your suggestion.
Works fine.
Many thanks.
Great.
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Can you tell me where you found the arduino-ide directory on your Mac? Just for my records.
It is here on macOS machines:
/Users/<username>/Library/Application Support/arduino-ide/
(where <username> is the macOS username)
The Library folder is hidden by default. You can make it visible by pressing the Command+Shift+. keyboard shortcut.
It worked on my Mac but I deleted the contents of this folder instead:-
/Users//.arduinoIDE
I couldn't find the arduino-ide folder
See above 
The .arduinoIDE directory contains other stuff. But maybe the arduino-ide directory was updated because you deleted the .arduinoIDE.
@sterretje Thanks for your assistance with this problem and prompt suggestions and resolution.
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