rpi3 clock drift

[Peter Jeremy]

On 2019-Nov-27 22:20:50 -0700, Ross Alexander <rwa at athabascau.ca> wrote:
>An Adafruit "ultimate gps hat" (typical commercial hyperbole, sigh.)
>It's about $65 after you add the 40 pin molex connector, the
>micro-whatever to SMA cable, and the external amplified patch antenna.

You can get a uBlox 7 or 8 module with a patch antenna and PPS output
for O($10).  It should be possible to wire the serial data to the PL011
UART and preserve the serial console UART but you'd to write a driver.

>You can get along without those last two if your Pi is outside, but
>I'm in a metal roofed building which the little patch antenna built
>into the hat proper finds impenetrable.  An external antenna out on
>top of the roof makes all the difference.

I have a metal roof and find putting the GPS module with a patch
antenna near a window (or even near an external wall) is sufficient.

-- 
Peter Jeremy
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