On 12/15/2017 08:10 AM, Timothe Litt wrote:
I use an 19xLVC too (On Raspbian == Debian).  But I also have an RTC. GPS does have outages,  can take a while to get a fix, and NTP wants consensus.  So I use my GPS receiver as a local clock source (preferred), but also configure several servers from the pools as a sanity check - and to deal with any GPS outages/slow starts.  It's worked well for me.

Along those lines, I haven't splurged yet, but Adafruit has an interesting module for ~$40 (US)  with a breakout module, ($45 on a Pi Hat - which is cheaper/easier than building your own PCB), which includes a GPS patch antenna.  If you need an external antenna, it comes up to about the cost of the Garmin, but draws only 20ma vs. 90, and is a more modern receiver.)   On paper it looks good.

See https://www.adafruit.com/?q=ultimate%20gps - I'm not affiliated with Adafruit, and while I've looked at the specs, don't have direct experience.  YMMV.

Thank you for sharing info Mukund and Timothe. I suspect I'll be playing over the holidays.



--
Grant. . . .
unix || die

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