[aprssig] APRSdos V863 Posit Text

Bill Bird billbird at cal.berkeley.edu
Wed Jul 13 10:21:46 CDT 2005


It turns out I am using two serial ports on my laptop (MS-Dos V6.00) but still 
have my posit text overwritten.  One serial port (COM1) is for the TNC 
(MFJ-1276) and the other serial port (COM2) is for the GPS (RS DigiTraveler). I 
am thinking that the APRSdos V863 must be involved since it is assigned the two 
serial ports during start-up.  I am using the default settings for APRSdos 
screen refresh and  GPS packet (30 and 180 seconds).  Everything works fine 
except the posit text I enter is overwritten with something like:

GGA/NUL/APRS*/good GGA/A=0004880488

Thanks and 73,

Bill Bird

Robert Bruninga wrote:
> This is because you are letting the TNC do the GPS
> independently of APRSdos.  All the TNC knows how
> to do is raw GPS.  But to get APRSdos to do the
> positioning, you either need two serial ports (one for
> the GPS) or you need to kludge together the
> HSP switch or have a GPS that you can turn off
> all NMEA except for GPRMC only once every 30 secs
> or so...  Bob
>>>>billbird at cal.berkeley.edu 07/13/05 12:35 AM >>>
> Hi,
> I'm using APRSdos V863 with a Radio Shack DigiTraveler in my VW Van.  I am 
> unable to keep the text I want to come at the end of the posit packet because it 
> is overwritten by information such as:
> GGA/NUL/APRS*/good GGA/A=0004880488
> This makes for a long packet and is not what I want anyway.  I can get something 
> like, Bill's VW Van, entered but it is very quickly overwritten.
> I can't find the solution in the documentation text files so I hope someone 
> (Bob, et al) can help me.
> Thanks,
> Bill Bird
> KG0YJ-2
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