arduino-uno-software-reset-wdt.ino

uint32_t count = 10;


void wdt_reset(void)
{
    // Watchdog Timer initialization
    // Watchdog Timer Prescaler: OSC/2k (2048 cycles)
    // Watchdog timeout action: Reset

    WDTCSR = (0 << WDIF) | (0 << WDIE) | (0 << WDP3) | (1 << WDCE) | (1 << WDE) | (0 << WDP2) | (0 << WDP1) | (0 << WDP0);
    WDTCSR = (0 << WDIF) | (0 << WDIE) | (0 << WDP3) | (0 << WDCE) | (1 << WDE) | (0 << WDP2) | (0 << WDP1) | (0 << WDP0);
}


void setup()
{
    Serial.begin(115200);
    delay(100);
    Serial.println("START...");
}


void loop()
{
    Serial.print("count = ");
    Serial.println(count--);

    if (count == 0) {
        Serial.println("SOFTWARE RESET...");
        delay(500);
        wdt_reset();
    }

    delay(1000);
}