gpsd, gpspipe NMEA sentences stream processing Post: 302272907

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Top Forums Shell Programming and Scripting gpsd, gpspipe NMEA sentences stream processing Post 302272907 by darius2 on Thursday 1st of January 2009 08:48:33 PM

01-01-2009

Banned

Quote:

Originally Posted by reborg

You're welcome.

Just for information, your posts didn't show up straight away it is because you posted links. If your first few posts contain links they have to be approved before they appear.

If you need help with more advanced awk programs, such as correlation or parsing of groupings of multiple NMEA sentences there are some very good awk programmers on this site who will be glad to help.

Ok.
I will try not to give web links in my posts to save your time Smilie

Another NMEA thread dealt with NMEA static file.
In my case, I succeeded to connect Bluetooth dongle to my server,
get it connected to Bluetooth GPS device and have gpsd, gpspipe
to read NMEA on-the-fly .
So awk examples gave me a hint how to select records with specified field and print results to stdout.

I would like to learn how basic gps software does work and what data gets from what NMEA sentences, fields, as for tests I need to write basic gps open source software, to discuss some features already known from
more advanced gps applications.

I don't expect to go to data graphical vizualization phase.
But would like to know how awk script can slow down postprocessed
data input. So have to open 2 awk terminal sessions in seperate windows to see how fast awk can process live data stream (pipeline), as in my case.

Darius

darius2

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net::gpsd3::return::device

Net::GPSD3::Return::DEVICE(3pm) 			User Contributed Perl Documentation			   Net::GPSD3::Return::DEVICE(3pm)

NAME

       Net::GPSD3::Return::DEVICE - Net::GPSD3 Return DEVICE Object

SYNOPSIS

DESCRIPTION

       Provides a Perl object interface to the DEVICE object returned by the GPSD daemon.

METHODS

   class
       Returns the object class

   string
       Returns the JSON string

   parent
       Return the parent Net::GPSD3 object

   device
       Name the device for which the control bits are being reported, or for which they are to be applied. This attribute may be omitted only when
       there is exactly one subscribed channel.

   driver
       GPSD's name for the device driver type. Won't be reported before gpsd has seen identifiable packets from the device.

   subtype
       Whatever version information the device returned.

   path
   native
       0 means NMEA mode and 1 means alternate mode (binary if it has one, for SiRF and Evermore chipsets in particular). Attempting to set this
       mode on a non-GPS device will yield an error.

   activated
       Time the device was activated, or 0 if it is being closed.

       Note: I expect this to change to either a boolean or a timestamp in the 3.5 protocol.

   cycle
       Device cycle time in seconds.

   mincycle
       Device minimum cycle time in seconds. Reported from ?CONFIGDEV when (and only when) the rate is switchable. It is read-only and not
       settable.

   flags
       Bit vector of property flags. Currently defined flags are: describe packet types seen so far (GPS, RTCM2, RTCM3, AIS). Won't be reported if
       empty, e.g. before gpsd has seen identifiable packets from the device.

   bps
       Device speed in bits per second.

   parity
       N, O or E for no parity, odd, or even.

   stopbits
       Stop bits (1 or 2).

BUGS

       Log on RT and Send to gpsd-dev email list

SUPPORT

       DavisNetworks.com supports all Perl applications including this package.

       Try gpsd-dev email list

AUTHOR

	 Michael R. Davis
	 CPAN ID: MRDVT
	 STOP, LLC
	 domain=>michaelrdavis,tld=>com,account=>perl
	 http://www.stopllc.com/

COPYRIGHT

       This program is free software licensed under the...

	 The BSD License

       The full text of the license can be found in the LICENSE file included with this module.

SEE ALSO

       Net::GPSD3

perl v5.14.2							    2011-11-09					   Net::GPSD3::Return::DEVICE(3pm)