Ax 25 software modem

A note on callsigns, addresses and things before we start 5. The authors wish to thank eric gustafson, n7cl, and lyle johnson, wa7gxd, for. The main category is ham radio arduino projects that is about arduino projects for ham radio applications. The file open wave capture file command opens wavefile to save all sound received from soundcard. That means streaming ultrahd 4k video with zero lag, downloading entire software packages in the blink of an eye, and incorporating an entire family of smart devices. You can chat, sendreceive email, surf the web and so on via radio depending on your bandwidth. The soundmodem has two tcpip interfaces to link with client application. Soundmodem is a multiplatform soundcard packet radio modem written by thomas sailer, hb9jnxae4wa. Packet radio mit soundkarte aprs, satellitenfunk, winlink teil 2. Im trying to establish a connection with either rms express and uz7ho sound modem on windows or with ax25tools axcall command with soundmodem on linux. Comparatively speaking, the maximum speed of a single 802. For one thing, when setting the modem type ch a it asks me to select afsk ax 25 1200 baud, but that option is not available on my uz7ho software.

As for the interface and other software, it is dependent on how you want to use ax. The active and exciting development of the sound card softmodem terminal node controller modulatorsdemodulators will help us continue to raise the throughput of our ax. The file open kiss capture file command opens capture file to save all receiving ax25 packets in the kissformat. Larry kenney wrote a detailed series of articles about the foundations of packet radio. It is currently capable of both sending and receive packets at 1200 bps afsk. It can be used standalone to observe aprs traffic, as a tracker, digipeater, aprstt gateway, or internet gateway igate. High level view, basic architecture and usage modemconnector. Packet radio is a synchronous system in which data is transmitted in ascii character packets. The authors of this new version took exception to the use of ax. But some radios do not adhere precisely to the 6 dboctave curve, and some radios interface the ax. It is used extensively on amateur packet radio networks. This let me have a lot more flexibility with the modules. Truetty interfaces with logger software via inifiles and windows messages.

I originally had it all just in a private repository, but realized others may find the software useful. Is that to support all operating modes other than kiss. This is a modem for afsk ax25 packet 1200 bps aprs compatible. The tnc is like a modem that encodes and decodes packets of data using what is called ax. The baycom terminal software no longer requires a tnc a simple modem or a slotcard is the frontend, and all ax. Rtty software, digital mode ham radio amtor, psk31, ax25.

I opted not to use the arduino ide, using the atmel studio software instead. It can be used standalone to observe aprs traffic, as a tracker. Windows for the end user is the easiest for installing the tcpip over ax. This link is listed in our web site directory since sunday aug 7 2016, and till today ax. Aprs client that reads and reports aprs location and message for amateur radio operators. It can be used standalone to observe aprs traffic, as a tracker, digipeater, aprstt gateway, or. It can be used standalone to observe aprs traffic, as a tracker, digipeater, aprstt gateway, or int. You can use a physical packet modem terminal node controller tnc, but at 1200, 9600 and even 19,200 windows dsp digital signal processing emulating a modem is superior. I think the best sound card based modem currently is soundmodem by uz7ho. I am using a usb sound card and vox mode on my radio. Take to attention that a minute of sound recording need above 1 mbyte disk space. Connecting to an irc server using a cheap uv5r radio a software based ax. I am developing a software dualport packetradio tnc that uses a soundcard as a modem and supports ax.

Ax25 soundmodem soundmodem is a multiplatform soundcard packet radio modem written by thomas sailer, hb9jnxae4wa. It is responsible for establishing linklayer connections, transferring data encapsulated in frames between nodes, and detecting errors introduced by the communications channel. Dec 28, 20 connecting to an irc server using a cheap uv5r radio a software based ax. These two functions are complementary, and essentially separate even though there may be shared parts such as clocks and power supplies etc.

This same data protocol is also used in commercial applications. It has been tested on windows xp, vista, 7, 8, 10 and has proved stable in operation. Part of this article refers to dirweolf, a packet ax. Multiplatform soundcard packet radio modem driver software. Are there use cases that require the connection layer to be handled by the modem. So for decoding the incoming packet frames, direwolf may be a good bet. I have been involved in packet radio in the spokane, wa since it began in the area in the early 80s. Packet, also known as fsk300, ax25, and x25, is a packet based protocol derived from ax. This project uses a pic 16f62x micro along with a mx614 1200 baud modem ic to decode ax. Building your own packet radio decoder isnt as hard as it sounds. The main feature of this program is that it is currently running three different demodulators in parallel, increasing the quality of reception. Radio amateur alejandro santos lu4ext is developing extmodem an open source aprs compatible ax. Im linux ax25 code gibt es verschiedene geratetreiber. Ive played with getting ax25 and direwolf running on.

File is closed by the fileclose wave capture file command. Ive been playing around trying to get a working config for using direwolf as a soundcard modem for packet radio on the raspberry pi. It is under development and is currently capable to both send and receive packets. I had been running an aprs rftointernet gateway an igate for a few months using a soundcard modem by thomas sailer, hb9jnxae4wa, soundmo. The software allows a standard pc soundcard to be used as a packet radio modem with all processing done on the main computer cpu. Some softwares that can decode cw, ax25, rtty, psk etc. What are some softwares that can decode cw, ax25, rtty, psk etc. The software packetradio tnc i am developing a software dualport packetradio tnc that uses a soundcard as a modem and supports ax. Hope that the softwares provided are freeware or open source. A connector library for communicating with modem software like eg soundmodem uz7ho soundmodem through agwpe connection.

It is an incredible software modem for packet reception. Packet radio lives on through open source software. Uz7ho develops a software dualport packetradio tnc that uses a soundcard as a modem and supports ax. After spending a number of weeks on the project getting the basics all sorted out, it started to turn into something quite usable.