arduino-uno-software-reset-gpio.ino

const int reset_pin = 5;
uint32_t count = 10;

void software_reset(void)
{
    digitalWrite(reset_pin, LOW);
}


void setup()
{
    digitalWrite(reset_pin, HIGH);
    delay(200);
    pinMode(reset_pin, OUTPUT);

    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);
        software_reset();
    }

    delay(1000);
}