# Reboot

In the device menu, there's an option to reboot the device. This function is enabled by default in the **Blynk.Edgent** examples (along with advanced provisioning).

To enable Reboot function manually in your sketch, you need to implement a device-specific procedure:

```cpp
void resetMCU()
{
#if defined(ARDUINO_ARCH_MEGAAVR)
  wdt_enable(WDT_PERIOD_8CLK_gc);
#elif defined(__AVR__)
  wdt_enable(WDTO_15MS);
#elif defined(__arm__)
  NVIC_SystemReset();
#elif defined(ESP8266) || defined(ESP32)
  ESP.restart();
#else
  #error "MCU reset procedure not implemented"
#endif
  for (;;) {}
}

BLYNK_WRITE(InternalPinDBG) {
  if (String(param.asStr()) == "reboot") {
    Serial.println("Rebooting...");

    // TODO: Perform any neccessary preparation here,
    // i.e. turn off peripherals, write state to EEPROM, etc.

    // NOTE: You may need to defer a reboot,
    // if device is in process of some critical operation.

    resetMCU();
  }
}
```