[Arduino, Watchdog] Soft-Reset Arduino using Watchdog

SoftwareResetWithWatchdog.ino

/*
 * Watchdog example
 *
 * Send 'r' through serial to reboot the Arduino, when it's back up, "Boot..." should appear.
*/

// include watchdog, part of avr-gcc compiler
#include <avr/wdt.h>

void setup(){
  wdt_enable(WDTO_2S); // we need to pet the dog at least every 2 seconds
  Serial.begin(9600);
  while (!Serial) {
    ; // wait for serial port to connect. Needed for Leonardo only
  }
  Serial.println("Boot...");
}

void loop(){
  wdt_reset(); // let's pet the dog
  while (Serial.available()) {
    Serial.println("Got char");
    char inChar = (char)Serial.read(); 
    switch(inChar){
      case 'r':
        reboot();
        break;
    }
  }
}

void reboot(){
  while(1){} // let's stay here and ignore the dog
}