David J Taylor wrote:
"Uwe Klein" <[email protected]> wrote in message
news:[email protected]...
David J Taylor wrote:
[]
I would still very much like to have a low-powered (watts) system
running NTP perhaps with a good (for timekeeping) FreeBSD version.
Something the size of a home router, with a serial port for the GPS.
Looking for better than (say) ten microsecond accuracy. About US
$100-150.
Unpack and Work or Fiddle a Bit ?
For Fiddle a Bit:
There is a wide spectrum of hardware available.
Take any of the Low Cost Thin clients ( Linux on ARM )
Take any of the "InternetRadio" sets ( same, Linux on ARM )
Take any of the Low Cost Router/WlanAccessPoint Hardware that
can have OpenWRT or similar installed. ( Linux on usually ARM )
http://en.wikipedia.org/wiki/List_of_router_or_firewall_distributions
Some even have ntpd in their package repository ;-)
uwe
Thanks for that, Uwe. Ideally, unpack and work!
A lot of hardware either doesn't have the serial port, or is grossly
over-priced (as it may be intended for "industrial" applications).
I think I would want a ready-to-run NTP, as I don't "do" Linux.
Something configurable via a Web interface.
Routers would indeed be a good choice, but there are hundreds! Someone
must have already researched the possibilities and be able to advise
models with a serial port and quality NTP?
Routers usually do not make good GPS clocks! If they are functioning as
routers they have work to do and time keeping is not a priority.
Used computers (X86) are available for free if you don't mind "dumpster
diving" for them. You can run Solaris on one. Solaris, is not Linux
but it looks like Linux and uses something close to the Linux command
line interface. You may find that it's better documented than Linux.
It's a commercial O/S and supported by the vendor. Support, if you need
it, will cost you money.
If your objection to Linux is based on the user interface and/or the
libraries and tools you are probably "SOL"; the only viable alternative
is some flavor of Windows!
NTP is pretty much the same no matter what platform you run it on. The
O/S vendor may add a coat of paint or some bells and whistles but that's
probably the ONLY difference.
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