#include <avr/wdt.h>

void setup() {
  // put your setup code here, to run once:
  Serial.begin(115200);
  Serial.println("Start programu");
  wdt_enable(WDTO_2S);
}

void loop() {
  // put your main code here, to run repeatedly:
  Serial.println("Loop jede");
  wdt_reset();
  for (;;)
  {
    if (millis() < 2000)
    {
      wdt_reset();
    }
  }
}