void resetForFlashing(int afterms) {
  // this can be used to flash new firmware even when serial DTS line is not connected, so no auto-reset on serial connect is performed
  // this schematic does not use a DTS line in order not to purge unsafed data accidentially
  // also it is normally not connected via USB directly, but over RS-232 with some metres of cable in between
  // called from serial routine, so that a serial command, iE "reset 1000" calls this function with value given
  // tested OK with a 1000ms delay before starting avrdude to upload the new binary
  saveAllCurrentData(false);
  Serial.print(F("saved all data, resetting in "));
  Serial.print(afterms);
  Serial.println("ms...");
  Serial.end();
  delay(afterms);
  //Serial.println(F("RESETTING NOW"));
  doHardreset();

  // WDT reset DOES NOT put bootloader in flash mode!!
  //wdt_disable();
  //wdt_enable(WDTO_4S);
  //while (1) {delay(500); Serial.print(".");}
}

void doHardreset() {
  pinMode(PIN_OUT_HARDRESET, OUTPUT);
  digitalWrite(PIN_OUT_HARDRESET, LOW); // pull a pin low that is connected to /RESET as WDT reset DOES NOT put bootloader in flash mode!!
}