Attached ntp.lua(.txt) can be used to get the current time from a NTP-Server or to keep a table-structure (hour,minute and second) constantly sync'ed (using a timer-function)
To run the 'realtime-daemon ':
will start a timer that:
- uses timer 1
- updates the internal 'clock' every 10 seconds
- and adjusts the clock every 30minutes (using an address from 3.at.pool.ntp.org)
(timeserver - ip can be omitted when 'ntpserver' inside the code is set)
Global TIME.hour TIME.minute and TIME.second will constantly be updated then..
Once started, you can save some memory be setting TIME.run=nil
For a one-time call use:
The function passed to :sync() will be called with a table as argument (T.hour T.minute T.second) once the NTP-server answered
Important: the program currently needs an internal timer (configurable in the source) for 'guarding' the udp-call against memory leakage.
Maybe this can be changed by setting up a single 'connect' and 'receive-handler' on startup but i haven't tried yet
To be honest, the 'full daemon' probably eats too much ram to be combined with 'real' work but perhaps you can tailor it to your needs...