[time-nuts] NTP/1-PPS/RS232 question

David J Taylor david-taylor at blueyonder.co.uk
Mon Aug 19 02:28:37 EDT 2013


From: Hal Murray

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)
==============================================

.. but /do/ try it without the convertor first - the lower 3.3V levels may 
be quite adequate for direct connection.  Of course, if you are sending over 
a long cable proper RS-232 levels will provide better signal integrity.

Cheers,
David
-- 
SatSignal Software - Quality software written to your requirements
Web: http://www.satsignal.eu
Email: david-taylor at blueyonder.co.uk 



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