Adafruit Pi GPS HAT -- serial port stuck

Gary E. Miller gem at rellim.com
Sun Jul 10 21:16:10 UTC 2022


Yo Hal!

On Thu, 16 Jun 2022 19:33:07 -0700
Hal Murray via devel <devel at ntpsec.org> wrote:

> Has anybody seen the serial port get stuck?

Not me, but I have heard reports.  Usually a voltage mismatch.

> It's software/kernel.  I can see the bits with a scope.

You can't just cat/minicom the serial port?

And stty shows the proper speed/framing?

> It works as expected until it runs out of satellites.  Then,
> sometimes it doesn't recover.

Why would it run out of satellites?  Forget to charge them up?

> Restarting ntpd doesn't fix it.  Rebooting does.

Wierd.

RGDS
GARY
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Gary E. Miller Rellim 109 NW Wilmington Ave., Suite E, Bend, OR 97703
	gem at rellim.com  Tel:+1 541 382 8588

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