Double serial output on Arduino 1.8.13 when uploading to Mega2560

[PickyBiker]

Please see this link for details

Environment: Win 10, Arduino 1.8.13, Genuine Arduino Mega2560
The upload function seems to start the mega2560 briefly then restarts it.
In the example sketch it results in a double output of "Hello" instead of a single output.
This problem does not exist in 1.8.12 and earlier versions.

// example mega2560 problem
void setup()
{
  Serial.begin(115200);
  while (!Serial);
  Serial.println("Hello");
}

void loop() {}

[per1234]

Some discussion on this subject on the forum:
https://forum.arduino.cc/?topic=703890

---

Additional reports:

• https://forum.arduino.cc/index.php?topic=711120
• https://forum.arduino.cc/index.php?topic=725208

[PickyBiker]

Thanks Per.

…

On Tue, Sep 29, 2020 at 7:57 PM per1234 ***@***.***> wrote: Some discussion on this subject on the forum: https://forum.arduino.cc/?topic=703890 — You are receiving this because you authored the thread. Reply to this email directly, view it on GitHub <#10764 (comment)>, or unsubscribe <https://github.com/notifications/unsubscribe-auth/AD4G3TYS5LOA4BAZKKIZQF3SIJ67JANCNFSM4RRAETQA> .