NOTE: At the time of writing DragonOS Pi64 is still in beta state. These instructions are valid for the last beta available end of April 2022.
Please navigate to https://sourceforge.net/projects/dragonos-pi64/ to get the latest version. Also consider following https://twitter.com/cemaxecuter for updates.
Extract the image file onto an SD card. Something like this might work for you:
$ zcat DragonOS_Pi64_Beta_GR3.10v5.img.gz | sudo tee /dev/sdb > /dev/null
$ sync
ATTENTION: /dev/sdb is only a placeholder for your SD card reader's device. If you don't know what that means, please use one of the available "Write image to SD card" tools available for the Raspberry Pi.
After booting the first time you need to reset the device once to get SSH working.
Get the IP of the Raspberry Pi (maybe check your router's web interface or similar) and log
in using SSH. Username: ubuntu Password: dragon.
Run volk_profile to optimize performance:
$ volk_profile
gr-iridium is located under /usr/src/gr-iridium and is already compiled and installed
in the system. You can execute it like this:
$ iridium-extractor /usr/src/gr-iridium/examples/<your-sdr>.conf > output.bits`
A good starting point for a config on the Raspberry Pi is hackrf-pi4.conf. It already
configures gr-iridium to get most of the Iridium band and still be able to do it on a
Raspberry Pi 4.
You can update gr-iridium by running:
$ cd /usr/src/gr-iridium
$ sudo git fetch origin
$ sudo git merge origin/master
$ sudo rm -rf build
$ sudo cmake -B build
$ sudo cmake --build build
$ sudo cmake --install build