RTC
The rtc module supports RTC (Real Time Clock). Use require('rtc') to access this module.
setTime(time)
time<number>
Set RTC time to the number of milliseconds since Unix Epoch (UTC 1970/1/1-00:00).
getTime()
- Returns 
<number> 
Read RTC time and returns the time as the number of milliseconds since Unix Epoch (UTC 1970/1/1-00:00).
This is equivalent to Date.now().