main.cpp usbotg

#include <Arduino.h>

void setup() {
  Serial.begin(115200);
  while (!Serial) delay(10);
  Serial.println("USB CDC OTG Ready");
}

void loop() {
  if (Serial.available()) {
    String s = Serial.readString();
    Serial.print("Received: ");
    Serial.println(s);
  }
  delay(10);
}