#oggstreamer – OggStreamer Distribution


We produced a limited number of devices and are now able to distribute those devices. If you are a developer working on related projects or want one device for your Medialab, Hackerspace, School, University or Radiostation.

Don’t hesitate to contact us (georg <at> otelo.or.at)

#oggstreamer – Kicad conversion now works

Today I made an effort to get the KiCad Files working (previously there was a need for a special KiCad GOST version)

So now you can donwload the updated KiCad-files here


Tested with the current KiCad 0.201509040901+6154~29~ubuntu14.04.1

#oggstreamer – Repair Series 1 – channel not working / high gain

some weeks ago I had to exchange an OggStreamer because one channel was not working – the user Mike recorded the following video to demonstrate the problem:

If you watch the video closely you can see that the left channel is always amplifying the Audio with a very high gain – and only as he turns the gain up also the right channel appears – actually it is the right channel that is working correctly and the left has an error where it has a very high gain.

Looking at the schematics reveals that a connection error to the Potentiometer (which is in the Feedback loop) could cause such a high gain of the inverting amplifier:


So a loose connector is my first guess. My second guess would be a faulty potentiometer.

Lets take the device apart:


gently push the whole assembly (top and pcb) out of the extruded alluminium case:


A quick look around and touching cables reveals the problem:


because I had a spare contact lying around i soldered on a new contact, but elsewise I could have recycled the orignial one:


Time to put everything to gether and check if it works:



both channels work now :) success.

#oggstreamer – UserInterface for optional LEDs

I just added a small but neat feature I want to include in the V1.0 of the OggStreamer firmware – it is a user interface that allows to control the optional LEDs on the right side of the device.

How it works – the main application (oggs_app) is creating a named pipe in the temporary directory, the name of the file is /tmp/userleds

so the following command will set the optional green led on

echo 1 > /tmp/userleds

you can send any parameter from 0 to 7 to /tmp/userleds. The parameter is interpreted as binary representation of the leds. 1 is the GREEN led, 2 is the YELLOW led, 4 is the RED led. 0 is all leds OFF and 7 is all leds ON

this feature unfolds its potential when you combine it with shell scripts – for example – everyone likes blinking LEDs.

while [ 1 ]; do
  echo 7 > /tmp/userleds
  sleep 1
  echo 0 > / tmp/userleds
  sleep 1

But also more useful tasks can be done, for example monitoring whether an IPAddr can be pinged.

while [ 1 ]; do
  ping -c 1 $1
  if [ "$?" == "1" ]; then
     #ping did not succed -> display RED Led
     echo 4 > /tmp/userleds
     #ping did succed -> display GREEN Led
     echo 1 > /tmp/userleds
  sleep 10



#oggstreamer – Firmware Release Candidate 3 – released ;)

it has been a while since there was an official Firmware Update for the OggStreamer – now it is time to release RC3 (maybe the last Release Candidate before V1.0)

Whats new:

  • Working WebGUI-Firmware upload (until RC3 you had to use the Command Line Tools)
  • Support for MP3 completed
  • Patches for AudioDSP are now working (fixes high pitch mp3 issues, and incorrect samplerates)
  • Support for DynDNS – Services like FreeDNS, DynDNS and many more
  • Support for the ShoutCast (ICY) and legacy IceCast1 Protocol
  • Cleaner Code for WebGUI – now using libcgi to be compliant to GPL

Where to get it:

The upload_firmware.sh script and the update-rc3.tgz can be found in the repositories if you want to update from a UNIX like environment

For windows download the updater tool here

Once you installed RC3 on your OggStreamer future updates can be done via the WebGUI ;)

#oggstreamer – Talk about the OggStreamer and OpenHardware @ MediaLab Prado

I had the chance to present the OggStreamer at Medialab Prado and I was also talking about some random thoughts about OpenHardware and the Open Technology Laboratory in Austria http://otelo.or.at

medialabprado-oggstreamer(click on the image to get to the video)

Many thanks to the people at MediaLab who made this talk possible ;)

#oggstreamer – NetIdee 2012 Report

For the last year the OggStreamer-Project was generously supported by the “NetIdee“- Program from the Internet Foundation Austria.

This Support allowed us to push the Software of this Project to “Release Candidate 1”-Status, Release a OggStreamer-SDK and also made it possible to produce a small-series of 54 Devices.

If you are doing OpenSource / PublicDomain / OpenSourceHardware Projects which are related to the Internet and Austria, the NetIdee Project might be a way to obtain some funding – (Their yearly Calls end usually in August)

Thanks a lot NetIdee!

The final report for the OggStreamer/NetIdee Project can be downloaded here (it is in German only).