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SvxlinkWrapper – Wrapper for SvxLink to provide additional functionally such as QSO logging and auto-connect May 17, 2012

Posted by GuySoft in Hamakor, ITU, linux, open source, programming, python.
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Hey all,

A short post to announce a small piece of software I released today on github for the ham radio people.
I give you SvxlinkWrapper, this wrapper sits on top of Svxlink‘s stdout and stdin and processes it with python. Making it easy to add more advance features to Svxlinik. Since Svxlink is written in C++ and takes a while to compile, this wrapper really speeds up development. Furthermore, it uses straight.plugin making its simple to write more modules by extending SvxlinkwrapperModule and placing it in the modules folder.

Currently the to modules that SvxlinkWrapper has are for auto-connect to Echolink nodes on startup and another for a QSO logger for Echolink connections. There is also a module that should let you send commands over the Echolink chat, if you extend it. This lets me open and close repeater connections directly from the Echolink chat box.

Thats it for today, now that I have more free time, I hope to publish more things, 73

Cheap USB interface to connect Ham radios and other devices to the PC October 14, 2011

Posted by GuySoft in Crictor, diy, Electronics, Hamakor, ITU, linux, open source, wireless.
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Ham radio PC interface

Hi all,
As promised in my last post, I have finally finished designing and building a cheap interface to connect ham radios or any other audio device that does not share audio common ground to a PC, including a PTT interface. Price should be around $17 or 60 NIS.  The control is done using a USB interface, so unlike most ham radio hardware that uses serial connections, this one is plug and play in modern PCs. The neat thing is that it uses them same commands as a RigBlaster. So this interface works out of the box with common ham radio programs like Echolink and Svxlink. The interface should also work with soundmodem which can be used for X.25 packet digital communications, without any extra hardware (I am still trying to get this to work). This interface could also be used to connect to other devices that don’t share a common ground. For example like phone lines.

Parts you will need

  1. TTL USB Serial interface – The main part is a simple CP2102 $4 controller that can be percussed from ebay. It simulates a serial device, meaning you can still work with older pieces of software with it. Note though you need to solder a cable from the RTS pin on the board, because normally they don’t come with a pre-made pin.
  2. Audio line isolation transformer – This can be easily salvaged from any old dial-up modem. That’s how I get mine, it seems to be much easier to get them off old modems than finding them in electronics shops, plus they are so easily identifiable (just make sure not to break the contacts when you take them out, happened to me twice). If you can’t find any old dial-up modems you can get it from ebay. (more…)

Echolink Node Native on Linux with Svxlink, and a Cheap PTT Hardware Interface August 8, 2011

Posted by GuySoft in Crictor, diy, Electronics, Hamakor, ITU, linux, open source, programming, wireless.
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The Jerusalem Echolink Node

The Jerusalem Echolink Node (4Z7GAI-R)

Hey all,

I recently got my amateur HAM Radio license from the Israel ministry of communication. My call sign is 4Z7GAI.

I have been working on getting an Echolink node running on the Jerusalem repeater using Linux. Echolink is a closed proprietary software that lets you connect ham radios to one another and key them across the Internet. Luckily someone wrote a FOSS program called Svxlink, which lets you connect to the Echolink network on Linux., A remote radio control with an echolink server, svxlink-server and an Echolink graphical client, Qtel. I am going to explain in this post how to get svxlink compiled and working (compiling is the hard part). I will also giving out here an Ubuntu package for the lazy ones among you.

I will also add a small section on the physical connection to the radio, an old Icom IC-02AT from the 80s (around my age). (more…)


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