Akses watchdog timer di Arduino

// LINE/twitter: @bambangSud #Whatsapp +62811234123
#include <stdint.h>
#include <avr/interrupt.h>
#include <avr/wdt.h>
#define LED_PIN 13

/*
 * The setup function.
 */
void setup() {
  Serial.begin(9600);
  pinMode(LED_PIN, OUTPUT);
  wdtSetup(); // <<--------- sub routine nya ada di bawah
}

/*
 * The main loop.
 */
void loop()
{
  digitalWrite(13, HIGH);   // set the LED on
  delay(1000);              // wait for a second
  digitalWrite(13, LOW);    // set the LED off
  delay(1000);              // wait for a second
  Serial.println("Background");
}

/*
 * Setup of the watchdog timer.
 */
void wdtSetup() {
  cli();
  MCUSR = 0;
  WDTCSR |= B00011000;
  WDTCSR = B01000111;
  sei();
}