How to implement whatchdog for Arduino Serial Gateway

[sineverba]

Hi to all!
I would implement a watchdog on the Arduino Serial Gateway connected on my PI.

You know that gateway sketch basically... does nothing in loop or in setup. It is blank.

Is sufficient put a watchdog of 1/2 seconds on setup, reset on loop and "forget"?

I mean...

// Enable debug prints to serial monitor
//#define MY_DEBUG

//#define MY_DEBUG_VERBOSE_SIGNING //!< Enable signing related debug prints to serial monitor

// Enable and select radio type attached
#define MY_RADIO_NRF24
//#define MY_RADIO_RFM69

// Set LOW transmit power level as default, if you have an amplified NRF-module and
// power your radio separately with a good regulator you can turn up PA level.
#define MY_RF24_PA_LEVEL RF24_PA_HIGH

// Enable serial gateway
#define MY_GATEWAY_SERIAL

// Define a lower baud rate for Arduino's running on 8 MHz (Arduino Pro Mini 3.3V & SenseBender)
#if F_CPU == 8000000L
#define MY_BAUD_RATE 38400
#endif

// Enable inclusion mode
//#define MY_INCLUSION_MODE_FEATURE
// Enable Inclusion mode button on gateway
//#define MY_INCLUSION_BUTTON_FEATURE

// Inverses behavior of inclusion button (if using external pullup)
//#define MY_INCLUSION_BUTTON_EXTERNAL_PULLUP

// Set inclusion mode duration (in seconds)
//#define MY_INCLUSION_MODE_DURATION 60
// Digital pin used for inclusion mode button
//#define MY_INCLUSION_MODE_BUTTON_PIN  3

// Set blinking period
#define MY_DEFAULT_LED_BLINK_PERIOD 300

// Inverses the behavior of leds
//#define MY_WITH_LEDS_BLINKING_INVERSE

/*
 * SECURITY // SIGNING SECTION
 */

#define MY_SIGNING_SOFT
#define MY_SIGNING_SOFT_RANDOMSEED_PIN 7
#define MY_SIGNING_REQUEST_SIGNATURES

#include <MySensors.h>
#include <avr/wdt.h>

void setup()
{
  // Setup locally attached sensors
 // activate watchdog
 wdt_enable(WDTO_2S);
}

void presentation()
{
  // Present locally attached sensors
}

void loop()
{
  // Send locally attached sensor data here
  // reset watchdog
wdt_reset();
}