Introduction: Raspberry Pi for Amateur Radio VOIP (Echolink) Part 1,2 and 3

This is an amateur radio transceiver wired into a Raspberry Pi and loaded with Echolink software (SVXLINK). One can use this with a 12V battery and connect to the echolink network. See video parts 1,2 and 3.

Software in use is SVXLINK at:


yi3sra (author)2017-10-21

i would like to operate one here in Iraq i had before a board but i think that would help promoting ham radio in iraq i have downloaded svxlink yet to operate the raspberry pi on it .. just wanted to say good work thank you i will follow up when i complete my work thank you

rockettpc (author)2016-01-23

Do you have schematics that you can share?

harsha raina (author)2015-07-28

Great project thanks. Can you tell me more about the sound interface card?

NoseyNick (author)2015-06-16

You're doing COS, PTT, and DTMF decoding without the IRLP board. Excellent! Nicely done! I was wondering why PiRLP felt they needed the extra card these days :-)

ve2zgm (author)2014-01-16

Ahh happy to see some amateurs radio here. Very good project you got there. Nice work!

I'm working on a repeater in my house, just for fun.

You can see some pictures here :

(Explanations in french, sorry)

Actually using multiple Arduinos to make the COM port communication interface between electronics and computer. I should spare some money to try this Rasberry Pie. I've linked the repeater on Echolink with a simple USB/Serial Port converter and an arduino. Working fine for now. Even still in experimentation. But I've to admit, I like your portable Echolink interface. Maybe I'll get on it for fun.

Amateur radio starting to be abandonned arround me. There is some clubs who own a couple of repeaters but they do nothing. They are not experiencing anything. When I've tried to help them and make some activity I got an "It's ok like that. We don't need to do anything. Our club and our repeater won't need to be modified...". So amateur radio starting to die here. I'm trying to have some fun on my side, but radios, alone, are not very enjoyable =P

kp4tr (author)ve2zgm2014-01-17

I have been building these for the past year. Mostly for IRLP but these are the first Echolink Raspberry Pi I build. I will feature them in Puerto Rico next weekend

ve2zgm (author)kp4tr2014-01-18

Is there an easy way to make synthesized voice with a Raspberry Pi ?

thinking about changing the PC, for my repeater, for a simple Raspberry Pi.

kp4tr (author)ve2zgm2014-01-18

Yes. there are 2 ways that I'm familiar with. One is using a package called festival. The other is called espeak.

install the package festival (apt-get install festival). Connect a speaker to the Pi, and use this command:

echo "testing my raspberry pi with voice | festival --tts >/dev/null 2>&1


With espeak, install with apt-get install espeak, and use this command:

espeak -ven-us+f2 -k3 -s200 "testing my raspberry pi with voice" > /dev/null 2>&1

I use alsa-utils to control audio but thats another subject

kp4tr (author)kp4tr2014-01-18

Forgot a close quote. It is:

echo "testing my raspberry pi with voice" | festival --tts >/dev/null 2>&1

japharl (author)kp4tr2015-04-03

Also, you can use flite as well, which has smaller space / voice requirements. (234k of space) (Sounds a lot more mechanical, but it works.)

flite in.txt out.wav

ve2zgm (author)kp4tr2014-01-21

Thank you for the advice. Probably be my next purchase on eBay. It's been a while since I wanted to start learning linux. That will be a good start.

kp4tr (author)ve2zgm2014-01-21

The Raspbery Pi is a great platform to learn Linux. I am more of a "command line" junkie but it has a decent GUI

ve2zgm (author)kp4tr2014-01-21

If I'm going to learn linux, I'll go for the right way =P I'll try to put aside my "Windows minded" and get in these command line.

ai4px (author)ve2zgm2014-01-20

I have run into the same issue with local clubs and APRS mic encoder. When I wanted to put a TNC at repeater site to catch (and mute) packets, they said no, the repeater is a service. When I put the TNC at the digipeater site listening to the input of the repeater (and not muting b/c its not on site) they complained about the .5 sec burst. No innovation in ham radio lately.

ve2zgm (author)ai4px2014-01-21

Yeah, this is unfortunate. I don't know what was the trigger element of this "mind changing". Between 1990 and 2000, here, this was the best years of Amateur radio. Active and innovationg. Unfortunately, for me, I was too yound to get on this in these years. Now it's start to degenerating. Local repeater are poor, less reliable, poorly maintained and currently used on 90% only for the phone path.

frank kd0hgi (author)2014-11-05

i like this and have been talking to kp4tr about him building one of these for me he built one for a ham radio friend of mine and these are neat allows ham radio operators to talk all over the world.

Peter_vk4qc (author)2014-02-26

Excellent project! Wonder if you have more info on the additional commands you have programmed. Thanks,

Peter VK4QC

mtrotta (author)2014-02-20

Hi guys,
I'm having umpteen issues with installing svxlink on my pi :-( I've tried it over and over for nerely 2 days straight now, if anyone could send me a image of their working sd card that that could edit to work with my callsign etc, I would be most grateful! My email is


kp4tr (author)2014-02-06

I like pronouncing it the way I feel is best for me...

justbennett (author)2014-01-16

Cool project. FYI, I believe it is pronounced Raspberry "Pie" as in the Greek letter Pi.

kp4tr (author)justbennett2014-01-18

I like using "pee eye", otherwise my non-techie friends think I'm talking about desserts

justbennett (author)kp4tr2014-02-06

To additionally confuse things, my Greek teacher pronounced the Greek letter 'Pi' as "pee" and claimed this was the proper way to do it. So I suppose you could pronounce it Raspberry Pee. But I don't think the creators intended that usage. We should make a version called the "CowPi." Then either way we can snicker. :0)

GentleMiant (author)kp4tr2014-01-21

Fine. So now you have them thinking it's a "Private Investigator". Really, I think most non-techies have heard of pi times r to the second. "P" "I" really sounds dorky.

But really nice work on the project, just the same.

Toby Robb (author)2014-02-05

Have done a few amateur radio projects.. Morse Code Keyer for Arduino and Amateur Radio 24Mhz -1800Mhz SDR Radio receiver for $15 (Digital,Sideband, AM, FM etc 0-40Mhz, Sine wave generator for $25.

kp4tr (author)2014-01-22

A beacon? Hmm i can easily do that with this node on 70cm. Even reconfigure it for fox hunting!
I have used dual band radios before . Maybe my next node will be 2m 70cm!

Wazzupdoc (author)2014-01-22

Great project! I'm using my RPI as a stand alone 2 meter beacon, using the program PiFM. It puts out about 10Dbm. If the local clubs are not doing it for you, try getting involved with WSPR. There's even a WSPR app for the RPI! See how far you can communicate with 10 milliwatts.

TampaGeek (author)2014-01-21

73 de BJ, KM4RB, also in the Tampa area. Very nice!!! I'll echo the comment about enjoying seeing more ham related stuff out here. I haven't done anything with the Pi yet (I'm more of an Arduino guy) but you just got me very interested in it... hope to hear you on the air sometime!

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