direwolf VS openwifi

144.800 is the APRS frequency in Europe. That's part of the 2m amateur band, and you can use tools like Direwolf to decode the packets. See https://aprs.fi/ for a display of the packets that make it to the internet.

Yes, recommended. https://github.com/wb2osz/direwolf

Since you're trying to save money, I'll second the direwolf software TNC. There's packet-radio.net with info about setting up direwolf.

By default it should be printing any successfully decoded packets to the terminal window. Did you follow https://github.com/wb2osz/direwolf/blob/master/doc/Raspberry-Pi-SDR-IGate.pdf or similar?

I use Direwolf with a Pi Zero and I believe there is a way to get the packet data out or passed to a script. I was going to look into this myself as some point as I wanted to just have a small screen on the Pi just to see traffic passing though my iGate on occasion.

Hardware TNC's were a thing in the 90s but nowadays software TNC'S such as Direwolf are far more efficient

On this topic, has anyone here used direwolf (https://github.com/wb2osz/direwolf) to communicate between two computers without radios?

Wheel successfully reinvented :)

Nothing stopping you setting up a whole AX.25 network between multiple machines using Dire Wolf [1] and the built-in AX.25 [2] (a derivation of X.25) support still in the Linux kernel. You get a proper network interface that shows up alongside eth0. Nice short instructions at [3]. Just don't hook it up to radios unless you're appropriately licensed. Speakers and mics only.

[1] https://github.com/wb2osz/direwolf

[2] https://en.wikipedia.org/wiki/AX.25

[3] https://g7vrd.co.uk/ax25-direwolf-linux

https://github.com/wb2osz/direwolf has the current and best instructions.

There is some open source firmware for very old WiFi chips:

https://wiki.debian.org/Firmware/Open#Radio

There is also some FPGA based open source WiFi chip things:

https://github.com/open-sdr/openwifi

https://news.ycombinator.com/item?id=27133079 :

https://ans.unibs.it/projects/csi-murder/ enabled by https://github.com/open-sdr/openwifi Both partially funded by EU's Horizon2020 program.

Openwifi talk at FOSDEM 2020 https://www.youtube.com/watch?v=8q5nHUWP43U

one of the developments out of his openwifi project is a 'Openwifi CSI fuzzer WiSec21 demo interview' https://www.youtube.com/watch?v=Jp2ImjCnlkQ

https://github.com/open-sdr/openwifi/blob/master/doc/app_not...

You could try the Xilinx ZC706 with an ADI9361 based FMCOMMS board. The OpenWIFI team has a few configurations listed on their readme that are popular: https://github.com/open-sdr/openwifi. I think these setups will still cost >$1000USD and require considerable effort to get going - I don’t know of a <$1000 SDR setup for 5G development that would be easy to setup and get going with. Curious if anyone knows of one.

Nice one Nuand, the BladeRF v2 looks like a very interesting alternative SDR modem to the cheaper Adalm Pluto educational kit by Analog Devices, the manufacturer of the transceiver chip being used by the BladeRF v2.

There is another alternative open source WiFi stack, openwifi and it has been discussed in HN before [2][3].

[1]https://www.analog.com/en/design-center/evaluation-hardware-...

[2 ]https://github.com/open-sdr/openwifi

[3]https://news.ycombinator.com/item?id=24273919