[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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