Re: [chrony-users] Re: Any nice example of chrony, WWVB, Raspberry Pi ?

[Mike Collins <mocallins@xxxxxxxxx>]

Any ideas where to look ?

I'm not actually quite sure i have everything implemented correctly, but I did as best i could find, on the web, and nothing had an example with a WWVB board.

Everything was GPS based.

On Tuesday, October 22, 2024 at 10:44:57 AM CDT, infection.many550@xxxxxxxxxxx <infection.many550@xxxxxxxxxxx> wrote:

On Tue, Oct 22, 2024 at 09:28:54AM GMT, Miroslav Lichvar wrote:

> These values are bad. A well-working PPS source should show much
> better skew and std dev. A rpi should be capable of getting below 1
> ppm and 100 microseconds. I suspect there is still something wrong
> with your setup. Maybe some noise is picked on the GPIO.

Here are mine:

3+0 ~$ chronyc -N sourcestats
Name/IP Address            NP  NR  Span  Frequency  Freq Skew  Offset  Std Dev
==============================================================================
PPS0                      10  7  145    -0.000      0.010    -1ns  292ns

RPi 3B + bookworm, Uputronics GPS hat

--
Ian

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