webaudio-modem
direwolf
| webaudio-modem | direwolf | |
|---|---|---|
| 1 | 18 | |
| 229 | 1,474 | |
| - | - | |
| 1.8 | 6.6 | |
| almost 2 years ago | 3 days ago | |
| HTML | C | |
| MIT License | GNU General Public License v3.0 only |
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webaudio-modem
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Creating a Modem with HTML5 and the Web Audio API
> The AudioContext was not allowed to start. It must be resumed (or created) after a user gesture on the page.
Created a new issue: https://github.com/martme/webaudio-modem/issues/8
direwolf
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What signal is this? the frequency is around 144.8 and I am listening from Bucharest. the only sound i can compare it to would be a velociraptor noise. the second image shows a sound that sounds like white noise and happen much more frequently. thanks in advance for anyone who helps!
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.
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This should be an APRS signal... but I guess I'm wrong?
Yes, recommended. https://github.com/wb2osz/direwolf
- Looking for tips on a RaspberryPi decoder for APRS Packets
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Trying to wrap my head around packet radio
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.
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simplest APRS decoding for PC?
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?
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Is there a general purpose, headless APRS application/server?
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.
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alternative to Mobilinkd TNC3
Hardware TNC's were a thing in the 90s but nowadays software TNC'S such as Direwolf are far more efficient
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Creating a Modem with HTML5 and the Web Audio API
On this topic, has anyone here used direwolf (https://github.com/wb2osz/direwolf) to communicate between two computers without radios?
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AudioTransmit – Transmitting data between computers using audio
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
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Is there a place with updated aprs installation instructions for the PI?
https://github.com/wb2osz/direwolf has the current and best instructions.
What are some alternatives?
minimodem - general-purpose software audio FSK modem
Digirig-Mobile - Integrated digital modes interface for amateur radio
multimon-ng
bladeRF-wiphy - bladeRF-wiphy is an open-source IEEE 802.11 compatible software defined radio VHDL modem
Reticulum - The cryptography-based networking stack for building unstoppable networks with LoRa, Packet Radio, WiFi and everything in between.
openwifi - open-source IEEE 802.11 WiFi baseband FPGA (chip) design: driver, software
CubeSatSim - CubeSatSim, the AMSAT CubeSat Simulator
Cat-n-Sound-Interface
pi-build
x1c3tool - A configuration tool for X1C3 APRS Tracker device, as well as a proper manual for same.
npm-aprs-parser - JavaScript module for parsing APRS messages