I use the Raspberry pi with GPS hat and it works great.  100 dollars and
you have a great NTP server

Chip

On Sun, Jun 19, 2022 at 8:33 AM David Woolley
<david@ex.djwhome.demon.invalid> wrote:

> On 19/06/2022 13:46, Jim Pennino wrote:
> > CTS/RTS is pin 8 on a RS-232 connector, so how is that "PPS over USB"?
>
> CTS is on pin 5, and RTS on pin 4, on an RS232 connector, which should
> be a DB-25 one.
>
> The DE-9 connector, used on PCs, is a TIA-574 connector, not an RS232
> one, and RTS is on pin 7 (although not useful in this context, as it is
> output from the PC).
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-- 
Ralph "Chip" Blach
(919) 260-0097

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