Friday, November 29, 2013

Raspberry Pi + svxlink = Low power echolink node

What is the easiest way to get echolink node up and running on raspberry pi? Surely, get a premade image which has everything inside. I've created one image which can fit into 2GB SD card for this, just follow the following steps to get it up and running:

For hardware, you need to have the following:
    • Raspberry Pi for sure, with a minimum 4GB SD card
    • A USB echolink interface, can be commercially sourced or DIY. There are many DIY schematics out there that you could follow.  
    • Here is the configuration on how to get the things working together, courtesy of website:

For software:
    1. Download the following prepared image from google drive, it is based on raspbian-2015-02-16 image and has pre-installed svxlink-14.08.
    2. Unzip the file and copy it to your SD card using the following instructions that can be found here.
    3. Boot up the RasPi, if you do not have an HDMI monitor, you may want to access the RasPi from your terminal emulator (putty or the like), connect the RasPi to your router via CAT5 cable. 
    4. To find the IP address of your RasPi, just go to your router status and look for the hostname raspberrypi. 
    5. Use SSH connection, logon to the RasPi using the default username/password which should be: pi/raspberry
    6. If you've bigger SD card then the 2GB image, you may want to use fullest capacity of the SD card, run the raspi-config command as sudo:
      • $ sudo raspi-config
      • Choose the first option to expand rootfs. Exit when done.
    7. Edit the following config files for svxlink (command):
      • $ sudo nano /etc/svxlink/svxlink.d/ModuleEchoLink.conf (edit the callsign - use sysop -L callsign, password, sysop, location and description)
      • $ sudo nano /etc/svxlink/svxlink.conf (edit the callsign), if you're using echolink interface that uses VOX, just leave the others as is. Edit the APRS info too as required.
    8. To tune the mic/speaker, use alsamixer:
      • $ sudo alsamixer (use the up/arrow to tune the volume, right/left to move between speaker and mic sliders). 
      • If the slider has MM underneath them, it means that they're muted, press 'M' to unmute.
    9. You should be done with the configuration, you may run the svxlink now to test it out.
      • $ sudo svxlink
    10. Your node should appear in the echolink now. Try to use your PC or android client to connect to your node and see if it is working. You may need to configure your router to allow echolink to work, use port forwarding and forward the UDP port 5198-5199 and TCP port 5200 to your RasPi IP address.
    11. If everything is working as expected and you want to run svxlink as a service, follow the steps here. The link to auto start the server has been vanished, so the best to do an autostart of the svxlink is by running the following command (if the /etc/init.d/svxlink is not present, copy the script over from the source under distribution/debian/etc/init.d/):
      • update-rc.d svxlink defaults

Tuesday, November 12, 2013

APRX Package

Offcial APRX package now is 2.07
The package can be obtain directly at
For open-WRT package 2.08, you can get it at 

MyAPRS has new Hosting!

Thanks to Wak Rejal (9W2XRX) for the hosting..
We hope that we can maintain the hosting
Please feel free to visit the APRSC site at