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gpspipe - tool to connect to gpsd and retrieve sentences


gpspipe [-h] [-d] [-l] [-o filename] [-n count] [-r] [-R] [-s serial-device] [-t]
[-T timestamp-format] [-u] [-p] [-w] [-S] [-2] [-v] [-D debug-level] [server
[:port [:device]]]


gpspipe is a tool to connect to gpsd and output the received sentences to stdout. This
makes the program useful as a pipe from gpsd to another program or file.

gpspipe does not require root privileges, and can be run concurrently with other tools
connecting to the local gpsd without causing problems.

The output will consist of one or both of the raw NMEA or native gpsd sentences. Each line
can be optionally time stamped. There is also an option to exit gracefully after a given
count of packets.

Optionally a server, TCP/IP port number and remote device can be given. If omitted,
gpspipe connects to localhost on the default port (2947) and watches all devices opened by

gpspipe may be run as a daemon, but requires the -o flag for writing the output to a file.


-h makes gpspipe print a usage message and exit.

-d causes gpspipe to run as a daemon.

-l causes gpspipe to sleep for ten seconds before attempting to connect to gpsd. This is
very useful when running as a daemon, giving gpsd time to start before attempting a

-r causes raw NMEA sentences to be output.

-R causes super-raw (gps binary) data to be output. This overrides NMEA and gpsd output

-s option causes the collected data to be written to the specified serial device with
settings 4800 8N1. Thus gpspipe can be used with -s and -r options to emulate a serial
port hardwired to a GPS that gpsd is managing.

-o option causes the collected data to be written to the specified file. Use of this
option is mandatory if gpspipe is run as a daemon.

-w causes native gpsdsentences to be output.

-S sets the scaled flag.

-2 sets the split24 flag on AIS reports. Note: this option is experimental and may be
changed or removed in a future release.

-t adds a timestamp to each sentence output.

-T sets the format of the timestamp. See strftime(3) for the available placeholders.
Setting this option implies -t. Default setting is "%F %T"

-u usec resolution time stamp, implies -t. Use -uu to output sec.usec.

-p enables dumping of profiling information in JSON.

-P enables dumping of PPS drift JSON in NMEA and raw modes.

-n [count] causes [count] sentences to be output. gpspipe will then exit gracefully.

-v causes gpspipe to show a spinning activity indicator on stderr. This is useful if
stdout is redirected into a file or a pipe. By default the spinner is advanced with every
messages written; specifying -v more than once will double the number of messages required
to rotate the spinner.

-V prints the version, then exits.

At least one of -R, -r or -w must be specified.


When gpsd is running gpspipe -r -n 100 will send one hundred raw NMEA sentences to
standard output, then exit.

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