zerk(1) - f39

1ZERK(1)                       GPSD Documentation                       ZERK(1)
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NAME

6       zerk - All purpose GREIS fitting
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OPTIONS

9       zerk [OPTIONS] [server[:port[:device]]]
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11       zerk -h
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13       zerk -V
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DESCRIPTION

16       zerk is an all purpose GREIS (GNSS Receiver External Interface
17       Specification) fitting. If you do not have a Javad GPS that speaks the
18       GREIS protocol then you can stop reading now.
19
20       This tool operates with your Javad GPS at a very low level. To
21       understand zerk you must first be familiar with your Javad GPS and the
22       documentation for the GREIS protocol. GREIS Guide
23       <https://www.javad.com/downloads/javadgnss/manuals/GREIS/GREIS_Reference_Guide.pdf>.
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25       zerk can decode common GREIS messages, poll the GPS status, enable and
26       disable GPS features, and send user-generated commands to the GPS. It
27       can read GREIS messages from a file. It can read and write directly
28       through a serial device, or through a running gpsd instance.
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30       zerk does not require root privileges, except maybe to access the
31       serial port in direct mode. It will run fine as root. Running under
32       sudo will cause loss of functionality.
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OPTIONS

35       The program accepts the following options:
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37       -?, -h
38           Makes zerk print a usage message and exit.
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40       -c COMMAND
41           Send a text string to the GPS. Accepts one parameter, COMMAND, the
42           command string to send to the GPS. The string is sent verbatim,
43           except a newline is appended.
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45       -d OPTION
46           Disable an option in the GPS. Accepts one parameter, OPTION, the
47           option to disable. zerk will exit after the GPS acknowledges the
48           command, unless the -W is given.
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50           4HZ
51               Disable basic GREIS messages at 4Hz. The messages are: [RT],
52               [UO], [GT], [PV], [SG], [DP], [SI], [EL], [AZ], [EC], [SS], and
53               [ET]
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55           COMPASS
56               Disable use of the COMPASS (BeiDou) constellation.
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58           CONS
59               Disable use of all constellations.
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61           DEFMSG
62               Disable the default message set (/dev/msg) at 1Hz.
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64           GALILEO
65               Disable use of the GALILEO constellation.
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67           GLONASS
68               Disable use of the GLONASS constellation.
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70           GPS
71               Disable use of the GPS constellation.
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73           IPR
74               Disable all Integer Pseudo Range messages. These are [rx],
75               [rc], [r1], [r2], [r3], [r5], [rl].
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77           IRNSS
78               Disable use of the IRNSS constellation.
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80           NMEA
81               Disable basic NMEA 4.1e messages at 4Hz. The messages are GBS,
82               GGA, GSA, GST, GSV, RMC, VTG, and ZDA.
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84           QZSS
85               Disable use of the QZSS constellation.
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87           SBAS
88               Disable use of the SBAS constellation.
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90           SNR
91               Disable all SNR messages, except [EC]. The messages disabled
92               are: [E1], [E2], [E3], [E5], [El].
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94       -e OPTION
95           Enable an option in the GPS. Accepts one parameter, OPTION, the
96           option to enable. zerk will exit after the GPS acknowledges the
97           command, unless the -W is given. -e accepts the same OPTIONs as -d,
98           except the action is to enable the option.
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100       -f FILE
101           Connect to a file or device. Accepts one parameter, FILE, the file
102           or device to open. Files are opened read-only. Character devices
103           are opened read/write, unless the -r parameter is given. Requires
104           the pyserial module.
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106       -O OAF
107           Load an Option Authorization File (OAF) into the GPS. Accepts one
108           parameter, OAF, command file to read. The OAF is just a special
109           case of a '.jpo' (GREIS command file). -O will send any valid .jpo
110           file to the GPS.
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112       -p PRESET
113           Send a preset command the GPS. Accepts one parameter, PRESET, the
114           name of the command to send. zerk will exit after the GPS
115           acknowledges the command, unless the -W is given.
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117           COLDBOOT
118               Coldboot the GPS.
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120           CONS
121               Poll the enabled constellations.
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123           DM
124               Disable all periodic GREIS messages.
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126           ID
127               Poll the receiver ID.
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129           IPR
130               Poll all Integer Pseudo Range messages. These are [rx], [rc],
131               [r1], [r2], [r3], [r5], [rl].
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133           OAF
134               Poll all OAF options.
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136           RESET
137               Reset (reboot) the GPS.
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139           SERIAL
140               Poll receiver serial number.
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142           SNR
143               Poll all Signal to Noise Ratio (SNR) messages. [EC], [E1],
144               [E2], [E3], [E5], [El].
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146           VENDOR
147               Poll GPS vendor.
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149           VER
150               Poll GPS version.
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152       -r
153           Read only. Do not send anything to the GPS.
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155       -R RAW
156           Save all raw data from the GPS into the file RAW.
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158       -S SPEED
159           Configure the GPS serial speed to SPEED bps.
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161       -s SPEED
162           Set local serial port speed to SPEED bps. Default 115,200 bps.
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164       -V
165           Print zerk version and exit.
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167       -v VERBOSITY
168           Set verbosity level to VERBOSITY. Verbosity can be from 0 (very
169           quiet), to 4 (very noisy). Default 2.
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171       -W
172           Force waiting the entire wait time. No early exit for completion of
173           -d, -e or -p command.
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175       -w WAIT
176           Wait for WAIT seconds before exiting. Will exit early on command
177           completion of -d, -e or -p command, unless -W is given. Default 2.0
178           second.
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ARGUMENTS

181       By default, clients collect data from the local gpsd daemon running on
182       localhost, using the default GPSD port 2947. The optional argument to
183       any client may override this behavior: [server[:port[:device]]]
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185       For further explanation, and examples, see the ARGUMENTS section in the
186       gps(1) man page
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ENVIRONMENT

189       Options can be placed in the ZERKOPTS environment variable. ZERKOPTS is
190       processed before the CLI options.
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EXAMPLES

193       Print current Javad serial port of GPS connected to local running gpsd:
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195            zerk -c "print,/cur/term"
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197       Decode raw log file:
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199           zerk -r -f greis-binary.log -v 2
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201       Change GPS port speed of device on /dev/ttyAMA0 to 230,400 bps:
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203           zerk -S 230400 -f /dev/ttyAMA0
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205       Watch entire GPS reset cycle:
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207           zerk -p RESET -v 2 -w 20 -W
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209       Poll SVs Status:
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211           zerk -W -w 2 -v 2 -c "out,,jps/{CS,ES,GS,Is,WS,QS}"
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213       Dump gpsd data from remote server:
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215           zerk -v 2 -w 5 server
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RETURN VALUES

218       0
219           on success.
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221       1
222           on failure
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RESOURCES

232       Project web site: https://gpsd.io/
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COPYING

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

239       Gary E. Miller
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243GPSD, Version 3.25                2023-01-10                           ZERK(1)