Error compiling on Arduino Nano ESP32 - cannot convert USBCDC* to HardwareSerial*

[rogerw-gh]

Had this error building synman/BME280 for an Arduino Nano ESP32 on PlatformIO.

lib/TelnetSpy/TelnetSpy.cpp:43:13: error: cannot convert 'USBCDC*' to 'HardwareSerial*' in assignment
Google suggested this compile flag:
platformio_options:
board_build.extra_flags:
- "-DARDUINO_USB_CDC_ON_BOOT=0"

Which didn't solve the problem because I put the entire section in, when it should have looked like:
build_flags =
-D PROJECT_NAME='"BME280 Sensor Publisher"'
-D HOSTNAME='"bme280-env-sensor"'
-D ELEGANTOTA_USE_ASYNC_WEBSERVER=1
-D ARDUINO_USB_CDC_ON_BOOT=0
-D BS_USE_TELNETSPY
-D BME280_LOG_LEVEL_BASIC

I kept searching and found an alternative fix...

https://www.esphome.io/api/uart__component__esp32__arduino_8cpp_source

There's this small section :
#if ARDUINO_USB_CDC_ON_BOOT
this->hw_serial_ = &Serial0;
#else
this->hw_serial_ = &Serial;
#endif

The build has the flag set to 0, which forces the serial value to &Serial which fails on the ESP32S3.
Changing the build flag to 1 has no effect.

So I tried changing the value of usedSer = &Serial to usedSer = &Serial0, that worked, but so did the compile flag when platformio.ini was configured properly, my bad.

The compile now runs to building a firmware image :-)

[rogerw-gh]

So I've closed the issue, hoping that Google etc. will pick up the necessary change to platformio.ini as a fix when building this code for an Arduino Nano ESP32.

[pro-bowl]

Hi, I'm using a ESP32-S3. Could you please explain in detail what and where to add or change in the platformio.ini and the TelnetSpy.cpp to make the lib compile?