Date: Wed, 23 Apr 2003 19:58:14 -0500 From: David Kelly <dkelly@HiWAAY.net> To: "Arthur W. Neilson III" <art@pilikia.net> Cc: freebsd-questions@freebsd.org Subject: Re: Accurate time without a network connection? Message-ID: <200304231958.15174.dkelly@HiWAAY.net> In-Reply-To: <250593183.1051090233@[10.25.0.9]> References: <20030422184554.GA13432@grumpy.dyndns.org> <250593183.1051090233@[10.25.0.9]>
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On Wednesday 23 April 2003 02:30 pm, Arthur W. Neilson III wrote: > > Hey David. I built a gps clock for ~200 bucks, it's really good. > It's based on the Motorola UT+ board which is 5" x 3" all SMT and > prebuilt, this is interfaced to a smaller daughtercard from TAPR > (Tuscon Amateur Packet Radio club) I am a ham myself and also > a freebsd guy since v2.1.2 ... the daughtercard converts the TTL > PPS (pulse per sec) signal from the gps to rs232 with a MAX232 > chip, you'll need some soldering skills to build the daughtercard, > connect things together and mount it in the enclosure of your > choice. Here check it out at my website: > > <http://www.wh7n.net/refclock/clock1.php>; That is really cool! I haven't found the ntpd documentation to as useful as it might. Lots of documentation in html format in /usr/share/doc/ntp/ but somehow I haven't found a table of contents. Eventually found file:/usr/share/doc/ntp/howto.htm but your example goes a long way toward my understanding. Many years ago I had a heck of a time with the xntpd documentation until I finally figured out only "server hostname" was needed in ntpd.conf. Then not too many years ago in a conversation with a friend who has a commit bit, learned he too had been stymied by ntpd and was running ntpdate from cron every hour or so on his servers. Not any more. As for the situation which prompted this thread, the worker bees on both ends have finally done an end-run around management and are talking direct. Apparently we will be allowed an ethernet tap to speak ntp protocol. As for other fun things I have my GPS sitting in a window trying to get a lock. It actually holds a lock about half the time. So I'm starting to play with the NMEA clock driver in ntpd. I may never get around to creating a webcam driver for ntpd. But it would be fun. -- David Kelly N4HHE, dkelly@hiwaay.net ===================================================================== The human mind ordinarily operates at only ten percent of its capacity -- the rest is overhead for the operating system.
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