{"id":7055,"date":"2021-01-16T18:50:00","date_gmt":"2021-01-16T13:20:00","guid":{"rendered":"https:\/\/nuclearrambo.com\/wordpress\/?p=7055"},"modified":"2024-10-03T15:10:32","modified_gmt":"2024-10-03T09:40:32","slug":"gnuradio-application-autostart","status":"publish","type":"post","link":"https:\/\/nuclearrambo.com\/wordpress\/gnuradio-application-autostart\/","title":{"rendered":"Auto start your GNU Radio script at boot on any Raspberry Pi"},"content":{"rendered":"\n

This is going to be a small tutorial that will allow you to run your GNU Radio script automatically at system boot. I am using a Raspberry Pi 4, a Pluto SDR and GNU Radio<\/a>. You need all sort of flexibility when you are on the field. For example, you created a nice GNU Radio block diagram that processes radio signals. Now, when you go out on the field, you should be actually focusing on testing your script and its performance. Not spend time playing around in the terminal just to fire up your script. On the other hand, this tutorial will come handy when its time for you to launch it on several other devices. In such situations, an application that loads at power on will always be preferable.<\/p>\n\n\n\n

GNU Radio script<\/p>\n\n\n\n

Fortunately, all versions of GNU Radio generate a python script. You will find it sitting alongside your .grc file or whatever extension they have come up with in the recent version. If you are using a GNU Radio version lower than 3.8, you require Python 2.7. On the other hand, GNU Radio 3.8 onwards, the generated script is run with Python 3.<\/p>\n\n\n\n

Working with Linux<\/p>\n\n\n\n

Try to fire up your terminal and run this python script. That way you will find that it works just as fine (given that everything else is correctly compiled).<\/p>\n\n\n\n

python \/path\/to\/gnu_radio_blk_script.py<\/pre>\n\n\n\n
Now that you are sure of your script, we are fine to move on to further steps. The next step requires you to install a terminal called “xterm”. On Raspberry Pi, we can do this with the following command<\/p>\n\n\n\n
sudo apt-get install xterm<\/pre>\n\n\n\n
Once you are done installing xterm, we can configure it to execute our script after boot process. In order to do so, create a new directory as follows and further create a new file.<\/p>\n\n\n\n
mkdir \/home\/.config\/autostart\nsudo nano \/home\/.config\/autostart\/lxterm-autostart.desktop<\/pre>\n\n\n\n
Inside the newly created “lxterm-autostart.desktop” file, paste the following code.<\/p>\n\n\n\n
[Desktop Entry]\nEncoding=UTF-8\nName=GNU Radio autostart\nComment=Execute a gnu radio python script\nExec=\/usr\/bin\/lxterm -e 'python \/path\/to\/your\/script.py'<\/pre>\n\n\n\n
Make sure you enter your script’s path correctly. Simply reboot your Pi board and you should have your script fire up at system startup. <\/p>\n\n\n\n
In my case, I had a PlutoSDR attached to the Raspberry pi. The GNU Radio script had a repeating waveform being generated. <\/p>\n\n\n\n