Re: [NTLK] NewtNAV update

From: Newton (newton_at_spymac.com)
Date: Thu May 05 2005 - 11:28:01 PDT


> been established (still looking for the magic Init string that will=20
> open the gates of joy for GPS Map as GPS listener),=20
I had several problems to solve, regarding sending the init string from
within GPSmap to the GPS receiver. First of all receiving of data of the =
GPS
receiver on the Newton worked fine but sending not. I had to fall back =
to a
PEECEE with the good old Kermit program to sucessfully send data to the =
GPS.
It was very likely due to some disadvantages of my serial connection =
between
Newton and GPS, may be that Macintosh compatible interface is only one =
way
just for my GPS receiver, because sending from a Mac failed too.=20

However, with a sequence of the following strings I finally succeeded:

1. disable all strings (7 are anyway to much and redundant!)
$PRWIILOG,???,V,,,#0D#0A

2. enable GGA string, each 2 sec, containing UTC, LAT, N/S, LON, E/W,
quality, No. of Sat., HDOP, ALT, Unit, GEOID_SEP, Unit, DGPS_AGE, =
STA_ID,
CRC, CRLF
$PRWILOG,GGA,A,T,2,0#0D#0A

3. enable RMC string, each 2 sec, containing some of the data from GGA =
but
Speed, Heading, Date and the magnetic variations
$PRWILOG,RMC,A,T,2,0#0D#0A

Those strings might be specific for the Rockwell chipset and its =
necessary
to verify with the manual for your specific GPS receiver. Without the =
RMC
string the GPSmap program will not show speed and direction and without =
GGA
sting the time and No. of satellites will be missing.=20

Marco

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