19
GSM Scout Serie
Softwareversion 37
11. Reading of the GPS string (GSM Scout GPS)
The GSM Scout GPS send the GPS- co-ordinates in a NMEA- string with RMC- for-
mate. The encoding of this string is shown in the example below. The informations in
the string are separated by comma.
Example of a string:
$GPRMC,161229.487,A,3723.2475,N,12158.3416,W,0.13,309.62,120598,,*10
name
Example
value
Description
message ID
$GPRMC
RMC protokoll header
time referring to UTC
161229.487
hhmmss.mmmm
status
A
A= data valid / V= data invalid
degree of latitude
3723.2475
ggmm.mmmm
N/S- direction
N
N=north, S=south
degree of longitude
12158.3416
gggmm.mmmm
E/W- direction
W
E=east, W=west
speed over ground
0.13
notes
direction over ground
309.62
deg.
Date
120598
ddmmjj
magnetic deviation
deg.
E=east, W=west
Checksum
*10
<CR><LF>
end of message
To understand the GPS data those should be put into a suited
software in order to show those on a map. You may use the
following links in intenet:
http://www.coniugo.de/html/gps_tracking.html
or
http://earth.google.de/