1Garmin(3)             User Contributed Perl Documentation            Garmin(3)
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NAME

6       GPS::Garmin - Perl interface to GPS equipment using the Garmin Protocol
7

SYNOPSIS

9           use GPS::Garmin;
10           $gps = new GPS::Garmin(  'Port'      => '/dev/ttyS0',
11                                    'Baud'      => 9600,
12                                 );
13
14       To transfer current position, and direction symbols:
15
16           ($latsign,$lat,$lonsign,$lon) = $gps->get_position;
17
18       To transfer current time:
19
20           ($sec,$min,$hour,$mday,$mon,$year) = $gps->get_time;
21
22       To transfer trackpoints:
23
24           $gps->prepare_transfer("trk");
25           while($gps->records) {
26               ($lat,$lon,$time) = $gps->grab;
27           }
28
29       To transfer Waypoints:
30
31           $gps->prepare_transfer("wpt");
32           while($gps->records) {
33               ($title,$lat,$lon,$desc) = $gps->grab;
34           }
35

DESCRIPTION

37       GPS::Garmin allow the connection and use of of a GPS receiver in perl
38       scripts.  Currently only the GRMN/GRMN protocol is implemented but NMEA
39       is a work in progress.
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41       This module currently works with Garmin GPS II+ equipments, but should
42       work on most Garmin receivers that support the GRMN/GRMN protocol.
43

GETTING STARTED

45       Make sure your GPS receiver is in host mode, GRMN/GRMN protocol.  To
46       start a connection in your script, just:
47
48           use GPS::Garmin;
49           $gps = new GPS::Garmin (  'Port'      => '/dev/ttyS0',
50                                     'Baud'      => 9600,
51                                     'Return'    => 'hash',
52                                  ) or die "Unable to connect to receiver: $!";
53
54       Where Port is the port that your GPS is connected to, and Baud the
55       speed of connection ( default is 9600 bps).
56
57       If Return is set to 'hash', then waypoints and tracks are returned as
58       hashes, possibly containing more information. XXX This is not
59       implemented completely for all data and device types. An undefined
60       'Return' value would cause to return lists with basic information
61       (latitude and longitude) instead.
62
63       To know current coordinates:
64
65           ($latsign,$lat,$lnsign,$lon) = $gps->get_position;
66
67           $ltsign is "S" or "N" (South or North)
68           $lat is current latitude in degrees.minutes.
69           $lnsign is "W" or "E" (West or East)
70           $lon is current longitude in degrees.minutes.
71
72       To transfer the track records:
73
74           $gps->prepare_transfer("trk");
75           while($gps->records) {
76               ($lat,$lon,$time) = $gps->grab;
77           }
78
79       $time is in unix epoch seconds
80
81       With 'Return' => 'hash' this would be
82
83           $gps->prepare_transfer("trk");
84           while($gps->records) {
85               %trk_data = $gps->grab;
86           }
87
88       instead.
89

KNOWN LIMITATIONS

91       - Trackpoint transfer won't work in the following Garmin devices, since
92       they don't support it:
93
94       GPS 50        GPS 55 GPS 150       GPS 150 XL GPS 165       GNC 250 GNC
95       250XL   GNC 300 GNC 300XL
96
97       You can check you GPS capabilities by looking at the table in page 50
98       of the Garmin protocol specification at
99       <http://www.garmin.com/support/protocol.html>
100
101       - You need to have Win32::SerialPort to have GPS::Garmin working in
102       Windows.
103

BUGS

105       Lacks documentation
106

AUTHOR

108       Joao Pedro B Gonçalves , joaop@iscsp.utl.pt
109

SEE ALSO

111       Peter Bennett's GPS www and ftp directory:
112
113               ftp://sundae.triumf.ca/pub/peter/index.html.
114               http://vancouver-webpages.com/peter/idx_garmin.html
115
116       Official Garmin Communication Protocol Reference
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118               http://www.garmin.com/support/protocol.html
119

POD ERRORS

121       Hey! The above document had some coding errors, which are explained
122       below:
123
124       Around line 519:
125           Non-ASCII character seen before =encoding in 'Gonçalves'. Assuming
126           CP1252
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130perl v5.36.0                      2022-07-22                         Garmin(3)