ESP32-C3 Arduino USB read/write without debug print

PlatformIO IDE
1

Using an ESP32-C3 board, I need to use the USB peripheral with CDC for the main application in firmware, and the UART0 port for debug printing.

The problem seems to be that I can either get debug printing on only the UART port, but USB serial comms don’t work, or the ESP_LOG output goes to both the UART and USB depending on the states of:
ARDUINO_USB_MODE
and
ARDUINO_USB_CDC_ON_BOOT

How can I keep debug printing to the UART port, but use the USB peripheral for various Serial (read and write) functionality?

2

Did yo uset up your UART as second Serial, i.e. Serial1?

3

ARDUINO_USB_CDC_ON_BOOT=1 and USB_MODE=1 will give you the objects Serial which is of type HWCDC and outputs to the USB-port , Serial0 and Serial1 which are of type HardwareSerial and output to UART0 and UART1.

If you set Serial0.debugOutput(true); your Serial.print statements should ogo to the USB serial port and log_xxx should go to UART0.