Addenda 24/06/2014
Other useful infos have been published here
http://www.zuidt.nl/blog/html/2014/06/12/use_your_gps_dongle_with_qgis.html

GPS units download data and live tracking

This page was started to allow share notes about how to download data from GPS units (possibly directly in QGIS) as well as set up the QGIS "live tracking" tool.

Download of points/tracks and USB GPS units with SD or micro SD cards

Many recent GPS units do have a SD or micro SD card where the data is saved directly (it may be optional) as GPX files. In this cases there is no need to use the

vector -> GPS -> GPS tools -> download from GPS

tool. The GPS unit (or just the SD card) can be attached to the computer as disk and then the necessary GPX files opened in QGIS as normal vector files.

Pairing bluetooth devices (like dataloggers) with the Operating system

On MS Windows

Using the Windows BT device manager the device is searched and added. It will ask for the PIN, usually 0000. On recent Windows releases there should be no need to install previously any drivers. After this process the datalogger is available trough a COM port, check the device properties to know the exact one.

On Ubuntu/Mint GNU/Linux

On Linux Mint the standard BT device manager didn't allowed me to easily pair the BT datalogger, so I used another software called Blueman Device Manager : it scans for new BT devices, then it allows the pairing and then allows to connect the BT device to a system port, that is usually

/dev/rfcomm0

Download of points/tracks from GPS units

Note about downloading points/tracks directly in QGIS

As documented in the manual QGIS uses GPSBabel to download points/tracks directly in the project. QGIS comes out of the box with a pre-defined profile to download from Garmin devices. Unfortunately there is a bug

http://hub.qgis.org/issues/6318

that does not allow create other profiles, so downloading directly in QGIS using the

vector -> GPS -> GPS tools -> download from GPS

tool is at the moment limited to Garmin USB units.

Download of points/tracks from a Garmin GPSMAP 60cs

On MS Windows

  • install the Garmin USB drivers ‚Äčhttp://www8.garmin.com/support/download_details.jsp?id=591
  • connect the unit
  • in vector > gps > gps tools > download from gps use the "type=garmin serial" and "port=usb:"
  • fill the fields "layer name" and "output file". Sometimes it seems to have problems saving in a certain folder, using something like "c:\temp" usually works

On Ubuntu/Mint GNU/Linux

it is first needed an issue about the permissions of the device, as described here

https://wiki.openstreetmap.org/wiki/USB_Garmin_on_GNU/Linux

for me what worked was to create a file

/etc/udev/rules.d/51-garmin.rules

containing this rule

ATTRS{idVendor}=="091e", ATTRS{idProduct}=="0003", MODE="666"

after that is necessary to be sure that the "garmin_gps" kernel module is not loaded

rmmod garmin_gps

and then you can use the

vector > gps > gps tools > download from gps

tool. Unfortunately there seems to be a bug

http://hub.qgis.org/issues/7182

and usually QGIS freezes 1/2/... times before the operation work fine.

Download of points/tracks from a BTGP-38KM datalogger (only Bluetooth)

On MS Windows

The already referred bug does not allow to download the data from within QGIS, so it is needed to use GPSBabel from the command line or using its interface. The working command was

gpsbabel -t -i skytraq,baud=9600,initbaud=9600 -f COM9 -o gpx -F C:/Users/giovanni/Desktop/aaa.gpx

On Ubuntu/Mint GNU/Linux

The same applies for Linux, for example from the GPSBabel GUI

On Linux it maybe somehow common to get a message like

skytraq: Too many read errors on serial port

it is just a matter to turn off and on the datalogger and try again.

Download of points/tracks from a BlueMax GPS-4044 datalogger (both BT and USB)

On MS Windows

Note: it needs to install its drivers before using it on Windows 7. See in the manufacturer site for the proper download.

Downloading with GPSBabel, both with USB and BT returns always an error like

gpsbabel -t -i mtk -f COM12 -o gpx -F C:/temp/testebtandre.gpx
mtk_logger: Can't create temporary file data.bin
Error running gpsbabel: Process exited unsucessfully with code 1

On Ubuntu/Mint GNU/Linux

USB

After having connected the cable use the

dmesg

command to understand what port is being used, in my case was

/dev/ttyACM3

then as usual use GPSBabel from the CLI or GUI

gpsbabel -t -i mtk -f /dev/ttyACM3 -o gpx -F /home/gio/Desktop/bluemax.gpx

Bluetooth

Use Blueman Device Manager to pair the device and make it available through a system port, then

gpsbabel -t -i mtk -f /dev/rfcomm0 -o gpx -F /home/gio/Desktop/bluemax_bt.gpx

QGIS live tracking

Garmin GPSMAP 60cs

On MS Windows

After many tries I realized that the easiest way to make it work is to use a middleware (freeware, not open) called GPSGate

http://update.gpsgate.com/install/GpsGateClient.exe

Launch the program, make it scan for GPS devices (works for both USB and BT ones) and then in QGIS just click connect in the live tracking tool using the autodetect mode.

On Ubuntu/Mint GNU/Linux

As for Windows the easiest way is to use a server in the middle, in this case GPSD, so

sudo apt-get install gpsd

then load the "garmin_gps" kernel module

sudo modprobe garmin_gps

and then connect the unit. Then check with

dmesg

the actual device being used bu the unit, in my case was

/dev/ttyUSB0

Now you can launch gpsd

gpsd /dev/ttyUSB0

and finally connect with the QGIS live tracking tool

BTGP-38KM datalogger (only Bluetooth)

On MS Windows

Using GPSGate is effortless

On Ubuntu/Mint GNU/Linux

Using GPSD is effortless

BlueMax GPS-4044 datalogger (both BT and USB)

On MS Windows

USB and BT

The live tracking works for both USB and BT modes, by using GPSGate or even without it, just use the autodetect mode, or point the tool the right port.

On Ubuntu/Mint GNU/Linux

USB

The live tracking works both with GPSD

gpsd /dev/ttyACM3

or without it, by connecting the QGIS live tracking tool directly to the

/dev/ttyACM3

port.

BT

The live tracking works both with GPSD

gpsd /dev/rfcomm0

or without it, by connecting the QGIS live tracking tool directly to the

/dev/rfcomm0

port.

15.png (65.4 kB) Giovanni Manghi, 02/21/2013 02:43 am

38.png (7.6 kB) Giovanni Manghi, 02/21/2013 03:07 am

43.png (7.2 kB) Giovanni Manghi, 02/21/2013 03:15 am