[time-nuts] Most popular NMEA sentence with date and time?

David Van Horn david.vanhorn at backcountryaccess.com
Tue Jul 23 11:28:54 UTC 2019


We aren't going that time-nutty,  but it's a fun project and running it from GPS sounded like fun. 
Thanks all, I have what I need. 

--
David VanHorn
Lead Hardware Engineer

Backcountry Access, Inc.
2820 Wilderness Pl, Unit H
Boulder, CO  80301 USA
phone: 303-417-1345  x110
email: david.vanhorn at backcountryaccess.com 

-----Original Message-----
From: time-nuts <time-nuts-bounces at lists.febo.com> On Behalf Of Mark Sims
Sent: Monday, July 22, 2019 2:29 PM
To: time-nuts at lists.febo.com
Subject: [time-nuts] Most popular NMEA sentence with date and time?

The GPRMC sentence  is supported on all the GPS modules that I have.

The GPZDA sentence is the best time/date sentence to use if your receiver supports it.  It just has date/time info and is usually optimized for the best timing performance.

Note that for best accuracy you need to adjust the arrival time of the sentence to the time encoded in the message.   For a lot of GPS modules this can be 200-300 msecs.   Lady Heather has code for adjusting for the time difference.  Different time offsets are automatically selected depending upon the detected receiver type or you can specify the value to use.   Most NMEA receivers are rather generic and not easily distinguisable, so the default value may not be the best.
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