/** Update the RTC */
private void updateRTC() {
rtc.setStamp(TimeSteward.currentTimeMillis());
}
/** Check if the RTC should be updated */
private boolean shouldUpdateRTC() {
long stamp = rtc.getStamp();
long now = TimeSteward.currentTimeMillis();
return stamp < (now - TIME_THRESHOLD) || stamp > (now + TIME_THRESHOLD);
}
