[time-nuts] NTP/1-PPS/RS232 question
Chris Albertson
albertson.chris at gmail.com
Mon Aug 19 06:39:35 UTC 2013
On Sun, Aug 18, 2013 at 10:58 PM, Hal Murray <hmurray at megapathdsl.net>wrote:
>
> holrum at hotmail.com said:
> > I am building a board to convert the output of the Adafruit Ultimate GPS
> > module to RS-232. The GPS has a 1-PPS output. What is the preferred
> com
> > port pin for feeding 1-PPS into NTP via an RS-232 connector?
>
> DCD, Pin 1 on DB-9 (DE-9)
Yes, this is right. But watch the polarity. It is easy to get it wrong.
In RS-232 the controls pins are different from the data pins.
--
Chris Albertson
Redondo Beach, California
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