[ gpsdrive ] beginner user

[Fred Felter]

Ross;

Here is my first attempt:fred at fred-laptop:~$ ps ax | grep gpsd                         (gpsr not turned on)
 4890 ?        S<s    0:01 /usr/sbin/gpsd -n -P /var/run/gpsd.pid /dev/ttyUSB0
 6710 pts/1    R+     0:00 grep gpsd
fred at fred-laptop:~$ ps ax | grep gpsd                                                                     (gpsr turned on)
 4890 ?        S<s    0:01 /usr/sbin/gpsd -n -P /var/run/gpsd.pid /dev/ttyUSB0
 6720 pts/1    R+     0:00 grep gpsd
fred at fred-laptop:~$ gpspipe -r
GPSD,R=1

fred at fred-laptop:~$ 

Than I did your second recommendation: fred at fred-laptop:~$ tail -f /var/log/messages
Oct 21 15:04:34 fred-laptop -- MARK --
Oct 21 15:24:34 fred-laptop -- MARK --
Oct 21 15:44:34 fred-laptop -- MARK --
Oct 21 15:58:59 fred-laptop gnome-power-manager: (fred) GNOME interactive logout. Reason: The power button has been pressed.
Oct 21 16:20:51 fred-laptop kernel: [ 1228.435393] usb 1-1.1: new full speed USB device using uhci_hcd and address 5
Oct 21 16:20:52 fred-laptop kernel: [ 1228.564405] usb 1-1.1: configuration #1 chosen from 1 choice
Oct 21 16:26:35 fred-laptop kernel: [ 1272.863922] usb 1-1.1: USB disconnect, address 5
Oct 21 16:27:44 fred-laptop kernel: [ 1281.298556] usb 1-1.1: new full speed USB device using uhci_hcd and address 6
Oct 21 16:27:44 fred-laptop kernel: [ 1281.319731] usb 1-1.1: configuration #1 chosen from 1 choice
Oct 21 16:28:38 fred-laptop kernel: [ 1289.148165] usb 1-1.1: USB disconnect, address 6
Oct 21 16:29:27 fred-laptop kernel: [ 1296.108664] usb 1-1.1: new full speed USB device using uhci_hcd and address 7
Oct 21 16:29:27 fred-laptop kernel: [ 1296.129659] usb 1-1.1: configuration #1 chosen from 1 choice

(the last 2 entries are when I reconnect the GPSr but I not sure of what they say)

Then I noted your mention of the need to use the nmea interface so I perused the Vista C handbook but apparently it offers no option to change interfaces. So I googled Vista C and gpsd and come up with this:


Details  for: Garmin Etrex Vista C Status  
( GPS ) ( Category: Serial ) 
 
ID 091e:0003 
Driver garmin-gps  
Linux-USB link http://www.sf.net/projects/garmin-gps http://www.kernel.org  
Vendor link http://www.garmin.com  
Comment Etrex
Vista C fully supported with garmin_gps driver.
Included in kernel 6.11.
You need to activate it in the serial devices, while configuring your
kernel.
Then, the device can be accessed using Garmin protocol through
/dev/ttyUSB0 or it can be used using NMEA (and gpsd/gpsdrive...) using
an additional driver of the garmin-gps project.
Works fine using pygarmin (http://www.sf.net/projects/pygarmin 
Submitted by Dutoit Cedric ( dutoitc <at> shimbawa.ch )  
Submitted on Wed, 13 Apr 2005 21:41:02 +0200 
Last edited on Wed, 13 Apr 2005 21:44:35 +0200 So it looks like I need to ¨configure the kernel¨ which, as I understand, is a task for experts and fraught with risk to ruin the OS. Do I have all that right?
I do have a serial GPSr (eTrex Venture which has a NMEA interface) but it doesn´t pick up sats inside the house like my Vista C does. However, if necessary I´ll play with it.

F




----- Original Message ----
From: Ross Scanlon <info at 4x4falcon.com>
To: gpsdrive at lists.gpsdrivers.org
Sent: Monday, October 20, 2008 1:05:21 AM
Subject: Re: [ gpsdrive ] beginner user

Hi Fred,

Lets start again.


Using a USB connection for the gps.

The setup I meant was from the Howto at:

http://www.4x4falcon.com/gpsdrive/howtos/HOWTO_Ubuntu_Gpsdrive_Full_manual_install.php

It's section 2 Setup GPSD

After doing this restart your computer with a gps attached to USB.


Next in a terminal enter:


ps ax | grep gpsd


The stroke is the vertical line character ( usually shift \ ).

This should show something like:

8582 ?        Ss     0:00 /usr/sbin/gpsd -n /dev/gps

Don't worry about the numbers etc just so long as gpsd is running.

Now run:


gpspipe -r


Hopefully you will get a whole heap of NMEA sentences shown.  CTRL-C to exit.

Note that unless your gps has a position it may not output any nmea so check that you actually have a position on the gps.


If you are not getting anything then do the following:

Unplug the gps from the computer.

At a terminal enter:

tail -f /var/log/messages

Plug the gps back in to the computer.

You should see some output which shows the location of the gps it will be possibly:

/dev/ttyUSB0



If your using a serial connection to the gps you will need to find which serial port it is attached to.

Serial ports are:

/dev/ttyS0 ... /dev/ttyS9 etc.

If it's the only serial port on the computer then it will most likely be /dev/ttys0

Try this instead of /dev/gps in the /etc/default/gpsd file.



Additional tip:

Make sure your gps is configured to output nmea on the USB or serial connection.


Cheers
Ross
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