[aprssig] Speed transmit suppression
archer at eskimo.com
Fri Feb 3 16:28:29 CST 2006
On Fri, 3 Feb 2006, Floyd Rodgers wrote:
> Ok, simple question most likely asked before;
> Can ground speed be suppressed sending on transmitted dated? If yes, then how?
> (currently most interested in applying to tinyTrac3, but tnc will come later)
Check the TinyTrak3 config program: It may have a checkbox for
OpenTracker _does_ have such a checkbox.
Another way to disable sending speed is to only pass NMEA sentence
"GPGGA" to it from your GPS. That sentence has altitude in it but
"GPRMC" has course/speed, and is usually the one that gets parsed by
the APRS TNC's in order to derive speed.
As for a TNC, get one that is APRS-capable and then set it up to
only send GPGGA sentences over the air. Any NMEA sentence is rather
long on the air, but this _would_ give you the sort of capability
Curt, WE7U. APRS Client Comparisons: http://www.eskimo.com/~archer
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