USBSoundModem

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← Revision 2 as of 2011-04-30 02:20:19 → ⇥
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* libax25 - library for hamradio applications
* ax25-apps - AX25 ham radio applications
* ax25-tools - AX-25 tools
* ax25-xtools - AX-25 tools (X versions) - optional
* ax25spyd - AX.25 traffic analyzer, dumper and spy daemon
* soundmodem - Sound Card Amateur Packet Radio Modems
* rigctl - Rig Control programs
* node - ham radio node (digipeter) application		  * libax25 - library for hamradio applications
 * ax25-apps - AX25 ham radio applications
 * ax25-tools - AX-25 tools
 * ax25-xtools - AX-25 tools (X versions) - optional
 * ax25spyd - AX.25 traffic analyzer, dumper and spy daemon
 * soundmodem - Sound Card Amateur Packet Radio Modems
 * rigctl - Rig Control programs
 * node - ham radio node (digipeter) application
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== Soundmodem config == == Configuration Files ==

=== Soundmodem config ===
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== axports == === axports ===
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== ax25d == === ax25d ===
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At this point you should be at a command line and can run
{{{
axcall sm0 callsign
}}}
where callsign is your local BBS.

Overview

Joey, NV0N, has been working on finding the right configuration for USB Sound Modems like the Tigertronics SignalLink USB. Below is a work in progress under Natty. Feel free to edit this page if you have success.

Software

This setup requires these packages:

  • libax25 - library for hamradio applications
  • ax25-apps - AX25 ham radio applications
  • ax25-tools - AX-25 tools
  • ax25-xtools - AX-25 tools (X versions) - optional
  • ax25spyd - AX.25 traffic analyzer, dumper and spy daemon
  • soundmodem - Sound Card Amateur Packet Radio Modems
  • rigctl - Rig Control programs
  • node - ham radio node (digipeter) application

Configuration Files

Soundmodem config

From /etc/ax25/soundmodem.conf

Note the IP address can be arbitrary for your testing (in fact, you can just leave it as is and simply amend the callsign). 

<?xml version="1.0"?>
<modem>

<configuration name="siglink"><channel name="Channel 0"><mod mode="afsk" bps="1200" f0="1200" f1="2200" diffenc="1" filter="df9ic/g3ruh" inlv="8" fec="3" tunelen="32" synclen="32"/><demod mode="afsk" bps="1200" f0="1200" f1="2200" diffdec="1" filter="df9ic/g3ruh"/><pkt mode="MKISS" ifname="sm0" hwaddr="NV0N-8" ip="44.128.248.62" netmask="255.255.255.224" broadcast="44.128.248.63" file="/dev/soundmodem0" unlink="1"/></channel><chaccess txdelay="300" slottime="100" ppersist="64" fulldup="0" txtail="30"/><audio type="alsa" device="plughw:2,0" halfdup="1" capturechannelmode="Mono"/><ptt file="/dev/ttyUSB0" hamlib_model="123" hamlib_params="-s 4800"/></configuration></modem>

axports

The standard naming convention for soundmodems is sm0 

# /etc/ax25/axports
#
# The format of this file is:
#
# name callsign speed paclen window description
#
sm0     NV0N-8  1200    255     2       145.090 MHz (1200  bps)

ax25d

# /etc/ax25/ax25d.conf
#
# ax25d Configuration File.
#
# AX.25 Ports begin with a '['.
#
[NV0N-8 via sm0]
NOCALL * * * * * * L
default 1 10 3 300 10 5 -       root    /usr/sbin/node node %d %s

startup script

This is the startup script (I call it packet.sh). Must be run as root/sudo. Advice is to run these manually the first few times until you get no errors. 

# start ax25 with the soundmodem driver using the port
# defined in /etc/ax25/axports
/usr/sbin/soundmodem /etc/ax25/soundmodem.conf -R -M >/dev/null 2>/dev/null&
sleep 1
# TNC Parameters txd, persist, slottime, txtail are done by
# soundmodemconfig and stored in soundmodem.conf
# this adds a route to our soundmodem
/sbin/route add -host 44.94.11.8 dev sm0
# route to the rest of the netrom IP capable nodes
/sbin/route add -net 44.94.11.0 netmask 255.255.255.0 gw 44.94.11.8 dev sm0
sleep 1
# listen for various incoming connects like PMS, node, etc.
# (MUST first be configured in /etc/ax25/ax25d.conf)
/usr/sbin/ax25d
sleep 1
# listen for stations heard
/usr/sbin/mheardd

At this point you should be at a command line and can run 

axcall sm0 callsign

where callsign is your local BBS.

UbuntuHams/USBSoundModem (last edited 2011-05-07 15:47:55 by www)