Compiling for Wemos D1 Mini AND C3 Mini

PlatformIO IDE
4

The Serial object is controlled by the flag ARDUINO_USB_CDC_ON_BOOT (and ARDUINO_USB_MODE) - See ESP32-S3 native USB interface and Serial Monitor missing first messages - #10 by sivar2311

The lolin_c3_mini.json sets ARDUINO_USB_CDC_ON_BOOT=1.

To clear this flag, add to your platformio.ini:

build_unflags=
  -DARDUINO_USB_CDC_ON_BOOT

If you now hover over the Serial object in your code, you should see HardwareSerial Serial instead of HWCDC Serial.

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