int getTemperature(double &t) {
  char status;
  status = pressure.startTemperature();
  if (status != 0)
  {
    // Wait for the measurement to complete:
    delay(status);
    status = pressure.getTemperature(t);
    if (status != 0)
      return 0;
    else
      return -1;
  } else {
    return -1;
  }
}