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GPS(1) GPSD Documentation GPS(1)

NAME

gps - Overview of gpsd clients and helpers

SYNOPSIS

Clients:

cgps [OPTIONS] [server[:port[:device]]]

gegps [OPTIONS] [server[:port[:device]]]

gps2udp [OPTIONS] [server[:port[:device]]]

gpscsv [OPTIONS] [server[:port[:device]]]

gpsmon [OPTIONS] [server[:port[:device]]]

gpspipe [OPTIONS] [server[:port[:device]]]

gpsplot [OPTIONS] [server[:port[:device]]]

gpsprof [OPTIONS] [server[:port[:device]]]

gpsrinex [OPTIONS] [server[:port[:device]]]

gpssubframe [OPTIONS] [server[:port[:device]]]

gpxlogger [OPTIONS] [server[:port[:device]]]

lcdgps [OPTIONS] [server[:port[:device]]]

ubxtool [OPTIONS] [server[:port[:device]]]

xgps [OPTIONS] [server[:port[:device]]]

xgpsspeed [OPTIONS] [server[:port[:device]]]

zerk [OPTIONS] [server[:port[:device]]]

Helpers:

gpscat [OPTIONS] file-or-serial-port

gpsctl [OPTIONS]

gpsdctl action device

gpsdecode [OPTIONS]

gpsdebuginfo

gpsfake [OPTIONS]

gpsinit [OPTIONS]

ntpshmmon [OPTIONS]

ppscheck [OPTIONS] device

DESCRIPTION

gpsd is a daemon for managing GPS receivers, GNSS receivers, AIS receivers, and more. Over time it has agglomerated a number of diverse clients that communicate with gpsd for various tasks.

CLIENTS

Each of the gpsd clients connects to a gpsd daemon to use the data in various ways. See the sections ARGUMENTS and OPTIONS for more information on the clients.

cgps

curses terminal client for gpsd

gegps

Google Earth client for gpsd

gps

Overview of gpsd clients and helpers

gpscsv

dump the JSON output from gpsd as CSV

gpsdecode

decode GPS, RTCM or AIS streams into a readable format

gpsmon

real-time GPS packet monitor and control utility

gpspipe

tool to connect to gpsd and retrieve sentences

gpsplot

tool to dynamically dump plot data from gpsd

gpsprof

profile a GPS and gpsd, plotting latency information

gpsrinex

Read data from gpsd convert to RINEX3 and save to a file.

gpssubframe

tool to dump subframe sentences from gpsd

gpxlogger

Tool to connect to gpsd and generate a GPX file

lcdgps

LCD client for gpsd

xgps

X client for gpsd

xgpsspeed

X speedometer for gpsd

HELPERS

The gpsd helpers can be used for administration of gpsd systems.

gps2udp

feed the take from gpsd to one or more aggregation sites

gpscat

dump the output from a GPS

gpsctl

control the modes of a GNSS receiver

gpsdctl

tool for sending commands to gpsd over its control socket

gpsdebuginfo

Generate a gpsd debug dump of your host.

gpsfake

test harness for gpsd, simulating a GNSS receiver

gpsinit

initialize CAN kernel modules for GPSD

ntploggps

log gpsd data

ntpshmmon

capture samples from gpsd or other ntpd refclock sources

LIBRARIES

Programmers can find additional information on the gpsd here:

gpsd_json

gpsd request/response protocol

libgps

C service library for communicating with the GPS daemon

libgpsmm

C++ and QT class wrappers for the GPS daemon

libQgpsmm

C++ and QT class wrappers for the GPS daemon

OPTIONS

The gpsd clients share a few common options:

-?, -h, --help

Print a summary of options and then exit.

-V, --version

Print the package version and exit.

ARGUMENTS

By default, clients collect data from the local gpsd daemon running on localhost, using the default GPSD port 2947. The optional argument to any client may override this behavior:

[server[:port[:device]]]

server

The optional host name, IPv4 address, or IPv6 address of the gpsd daemon to connect to. If the server specification contains square brackets, the part inside them is taken as an IPv6 address and port/device suffixes are only parsed after the trailing bracket. The default is localhost.

port

The optional TCP port of the daemon to connect to. The default is 2947.

device

The optional device name to be watched.

Some possible cases look like this:

example.com

Connect to the default port 2497 on example.com, trying both IPv4 and IPv6.

example.com:2317

Look at port 2317 on example.com, trying both IPv4 and IPv6.

localhost::/dev/ttyS1

Look at the default port, 2947, of localhost, trying both IPv4 and IPv6 and watching output from serial device 1.

71.162.241.5:2317:/dev/ttyS3

Look at port 2317 at the specified IPv4 address, collecting data from attached serial device 3.

[FEDC:BA98:7654:3210:FEDC:BA98:7654:3210]:2317:/dev/ttyS5

Look at port 2317 at the specified IPv6 address, collecting data from attached serial device 5.

ENVIRONMENT

Most of the gpsd clients check for the environment variables GPSD_UNITS, LC_MEASUREMENT, and LANG. Maybe more.

GPSD_UNITS is checked if no unit system is specified on the command line. It may be set to 'i'. 'imperial', 'm', 'metric', or 'n', 'nautical'.

LC_MEASUREMENT and then LANG are checked if no unit system has been specified on the command line, or in GPSD_UNITS. If the value is 'C', 'POSIX', or begins with 'en_US' the unit system is set to imperial. The default if no system has been selected is metric.

RETURN VALUES

The gpsd clients return simple success or failure codes:

0

on success.

1

on failure

SEE ALSO

gegps(1), gpsctl(1), gpsdebuginfo(1), gpsprof*(1), gpsfake(1), gpscat(1), gpspipe(1), gpsmon(1), xgps*(1). xgpsspeed(1)

libgps(3), libgpsmm(3)

gpsd(8)

RESOURCES

Project web site: <https://gpsd.io/>

COPYING

This file is Copyright 2013 by the GPSD project
SPDX-License-Identifier: BSD-2-clause

2023-01-10 GPSD Version 3.25