ESP32 delay required after Serial.begin

[gfvalvo]

@michael_x

BTW: As you mention "native USB", it's interesting to me that

  Serial.begin(115200);
  while (!Serial) delay(10);  // waiting for native USB Serial to become alive
  delay (500); // You still have to wait a while on an ESP32 ...

@michael_x

ESP WROOM 32 module.

ESP32 WROO32 doesn't have native USB, its Serial is a regular UART. So the while() loop terminates immediately and you still need to wait for the OS, etc to finish doing its thing.