@johnlenfr

Hi, on Arduino IDE 1.6.5, when I use Serial.println("!!!!!!!!!!!!!! FACTORY RESET !!!!!!!!!!!!!!!"); in the sketch, I can't upload the sketch in my arduino board MEGA2560.
I have to unplug the board and I have the error:
"Arduino : 1.6.5 (Windows 7), Carte : "Arduino Mega or Mega 2560, ATmega2560 (Mega 2560)"

Le croquis utilise 2 992 octets (1%) de l'espace de stockage de programmes. Le maximum est de 253 952 octets.

Les variables globales utilisent 244 octets (2%) de mémoire dynamique, ce qui laisse 7 948 octets pour les variables locales. Le maximum est de 8 192 octets.

avrdude: stk500v2_ReceiveMessage(): timeout

avrdude: stk500v2_ReceiveMessage(): timeout

avrdude: stk500v2_ReceiveMessage(): timeout

avrdude: ser_send(): write error: sorry no info avail

Problème de téléversement vers la carte. Voir http://www.arduino.cc/en/Guide/Troubleshooting#upload pour suggestions.

Ce rapport contiendrait plus d'informations si l'option
"Montrer les informations de sortie pendant la compilation"
était activée dans Fichier > Préférences.
"
Have you got the same problem? Is it due to the '!' caracter?

Thanks for reply.
John

I tested with the Blink sketch:

/*
Blink
Turns on an LED on for one second, then off for one second, repeatedly.

Most Arduinos have an on-board LED you can control. On the Uno and
Leonardo, it is attached to digital pin 13. If you're unsure what
pin the on-board LED is connected to on your Arduino model, check
the documentation at http://www.arduino.cc

This example code is in the public domain.

modified 8 May 2014
by Scott Fitzgerald
*/

// the setup function runs once when you press reset or power the board
void setup() {
// initialize digital pin 13 as an output.
pinMode(13, OUTPUT);
Serial.begin(115200);
}

// the loop function runs over and over again forever
void loop() {

Serial.println("!!!!!!!!!!!!!! FACTORY RESET !!!!!!!!!!!!!!!");

digitalWrite(13, HIGH); // turn the LED on (HIGH is the voltage level)
delay(1000); // wait for a second
digitalWrite(13, LOW); // turn the LED off by making the voltage LOW
delay(1000); // wait for a second
}