On 1 Aug 2010, at 03:06 , mattschinkel wrote:
That suggestion you have about adjusting it remotely seems like a good idea. I guess you would do it via serial port, and maybe tune it to one of the accurate clocks on the net.
I would. Typically, such a PIC spews logging data via a serial port to a PC. On the PC there is a Python logging program that saves the data in a daily rotating logfile and examines the date string. If the time is too much off, it will send a correction back to the PIC via the serial port. The PC check a timeserver once a day to keep the right time, in a cron job, for instance.
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