Build Raspberry Pi GPS location/navigation device

While every smartphone has GPS, the Pi can also be converted into a GPS receiver with a cheap Raspberry Pi GPS module. In many outdoor applications, especially those that move (Car-PC, weather balloon, etc.), the exact position is a big advantage. Mobility is achieved with a battery pack or a USB power bank.

In this tutorial, I’ll show you how tracking works with such a GPS module and what you need for it.

Required Hardware Parts

I have used the following parts:


The wiring is very simple:

GPS Modul Raspberry Pi
 VCC 3.3V (Pin 1)
 RX TXD/GPIO 14 (Pin 8)
 TX RXD/GPIO 15 (Pin 10)
 GND Ground (Pin 6)

The Raspberry Pi pinout is here.


Release serial interface

If you have not already released the serial interface before, this must happen beforehand. For this we edit the following file:

sudo nano /etc/inittab

Here the following line (presumably the last one) has to be commented out (or deleted) by means of a rhombus # at the beginning. Storing is done with STR + O, finished with CTRL + X.

T0:23:respawn:/sbin/getty -L ttyAMA0 115200 vt100

Then there is the file/boot/cmdline.txt to be edited,

sudo nano /boot/cmdline.txt

the following entries are deleted:

console=ttyAMA0,115200 kgdboc=ttyAMA0,115200

The last entry does not seem to exist in all OS versions by default. Your file should look like this:

dwc_otg.lpm_enable=0 console=tty1 root=/dev/mmcblk0p2 rootfstype=ext4 elevator=deadline rootwait

For the changes to be accepted, a restart is absolutely necessary. This can also be done after installing the other software.


Raspberry Pi GPS Module – Software

We need a few programs to read the Raspberry Pi GPS module. Before that, however, we need to update the repositories.

sudo apt-get update
sudo apt-get install minicom gpsd gpsd-clients

If you have not restarted before, this must be done now at the latest

sudo reboot now

Now everything should be ready and the module ready for the test. In addition, we inform the module that it should work with a baud rate of 9600:

stty -F /dev/ttyAMA0 9600

In this case, no (error) message should occur. Afterwards, we can have the current configuration output:

stty -F /dev/ttyAMA0

You start with the first test

minicom -b 9600 -o -D /dev/ttyAMA0

Here the baud rate, as well as the device is indicated (with CTRL + A, Q you finish). The list is a bit confusing, but it works well if only the raw data is needed.
To get a better look, we start gpsd. Again, we have to specify the baud rate

sudo gpsd /dev/ttyAMA0 -F /var/run/gpsd.sock -n

before we can start:

cgps -s

Raspberry Pi GPS Modul - gpsd

Make sure that the reception to the GPS satellites can be made, so go outside, or at least to a window. Where the reception in the house tends to be good, you can test with your phone.

14 Responses

  1. Hello! Thanks for the guide! How would I send data collected from this sensor to the Azure IoT Hub?

  2. Hmmm…. any GPS spits out Lat-Lon coordinates. How are you going to navigate with these???
    In other words,connecting a GPs is TOTALLY USELESS without a navigation software. So. Where is the navigation software?

  3. I’m interested in this project but I have not understood some things .

    What does “Release serial interface” mean? What are we trying to do? And why?
    What does “Storing is done with STR+O” mean?

    I’m confused about the baud rate change. One paragraph says that we need to change it whereas the next suggests that we don’t.

    What does “(CTRL + A, Q you finish)” mean?

    Then: “we need to specify the baud rate…” but I don’t see it.

    Is it me or do you need someone to check things to make them more understandable by the masses?

    • Write the instructions in American dialect please. Don’t assume everyone knows what you mean when you talk programming script.

      • Actually the above is in American dialect.

        There is no “programming script”. The author is walking through the simple steps of editing a couple of files and installing software. Then running the command(s).

        Maybe you should understand the environment more before criticizing.

  4. If you are using the adafruit gps breakout board and have it connected by usb to the pi, try ttyUSB0 instead of ttyAMA0.

  5. First of all maybe you should go a look up what GPS is/means.
    Global Positioning System, it tells you where you are in the world.

    It’s not totally useless without navigation and the author has just shown you how to use the module to get that information.

    GPS Navigation which is what you are talking about is a whole separate piece to the pie. Maybe you should understand what your talking about before you are critical of someone else work.

    Kodos to the author, I have not tried these steps but thank you for this part of the puzzle in working towards GPS on raspberry pi. But I am going to try them with the Raspberry Pi Tracking Hat. Will let you know how it works out.

  6. Hi, may I just ask, how could I get the values of lat and long from the “cgps -s”? Is there a .py code needed. I would be sending the data to a database, could you please help me how?

  7. Hi I’ve got an issue where I get n/a for everything and no fix in status
    Anyone know how to fix it ?

  8. Good afternoon,
    I’m encountering an issue with this because my Raspberry Pi does not have /etc/inittab. How do I get around this? I’m assuming it’s because the evil systemd has taken this over like everything else it touches. LOL. Either way, just point me in the right direction and I should be able to figure out the rest.


  9. I just tried to install Navit from apt-get with a USB GPS.

    A serial model can’t possibly be any worse that trying to navigate all the problems inherent in the GPSD software elements, the IPv4 and IPv6 networking and my IPTables firewall. It’s a nightmare.

    However, having finally gotten the USB GPS to be seen Navit loaded with the error:
    error:navit:xinclude:Unable to include /usr/share/navit/maps/*.xml
    Why? Because there is no /usr/share/navit/maps/*.xml. The directory is empty….

    Is there anything besides Navit?


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