is a project with the aim of developing a MESH data network covering the
Forth Estuary and its environs.
FEEDNET is operated by volunteers who use their technical skills and
knowledge to assist the local community in times of need.
They do this by providing additional means of communication to the
public sector agencies responsible for resilience and continuity
FEEDNET is independent of the public internet and therefore provides a
resilient method of communication in the event of major outage of public
FEEDNET is built and managed by radio amateurs, the majority of them
members of RAYNET. Just one tool in RAYNET's armory of resilient
communications, the MESH network is built on several key fixed backbone
links connecting important locations 24x7. Network coverage is then
tailored to meet specific demands by sending out RAYNET mobile operators
to run temporary nodes.
The MESH nodes that form FEEDNET are self discovering, self configuring,
self advertising and fault tolerant. Most tasks that you can do
over a wired or wireless network at your home or office can be done on
FEEDNET is NOT an alternative to commercial services for general
communications. It is an experimental system. It is a means for RAYNET to provide its services to its
users. These services comprise file sharing facilities, email, webcams,
IRC (Internet Relay Chat) and a VOIP telephone service accessible across
the network. Click on the Feednet Services
menu link at the left to find out more.
Picture Right - node installation
on a cold,wet, windy winter's day !
Bernie, GM4WZG has recently
completed a RoIP VHF transceiver project. With an
on-board programmable VHF transceiver and a built in soundcard interface
USBtran is a convenient and easy to use method of interfacing VoIP
systems to Radio. Further details here.
We have implemented Teamspeak PTT
app on FEEDNET. We also have been asked recently about VoIP,
RoIP and PTT technologies. We also get regularly asked about
other public systems. We have put together a
small guide to try and explain the various technologies.
We can now use standard VTUN technology to merge two geographically
remote Mesh networks into one via a ground based Internet or a Satellite
link. This served us well when doing a demonstration at the recent
RAYNET AGM in Grangemouth. There was no direct RF link from the AGM
location but the mini-network that we assembled for demonstration
purposes seamlessly linked up with the main FEEDNET network via a small
3G modem plugged into the back of a node.
We have added another useful application to the armory.
RAYNET sites can be busy places and messages are often being handled in
a variety of ways, always keeping the RAYNET operators busy. We
thought that a simple ticket printer at each FEEDNET location could be
used as a way of sending messages accurately and in a form that requires
absolutely no technical knowledge on the part of the recipient.
How does it work ? Anyone on the network uses a web page to enter
their message and its destination(s). On clicking "send" the message
appears as a printout at the message destination to be torn off and
handed to the recipient. Think of it as the old fashioned ticker
tape of the early 20th Century, but brought forward into a modern
A self contained VHF/UHF transceiver combined with a Linux single board
server (PI2) running Asterisk VOIP. So what does it do ?
Well anyone on the network can dial into this transceiver using their
telephone (perhaps an old mobile phone with the SIM card removed) and
monitor the radio channel, or, by pressing "*" on their telephone, can
transmit through it. The unit runs from 12v, is very portable and
plugs into any FEEDNET node (or a home router for that matter).
It is a simple remote base, but there is much scope for different
modes of use. How about two, or more of these, placed at distant
locations but linked via FEEDNET. Depending on how you configure
them you have a large, distributed conference/repeater system or
several access points into different sites.
Archive of Recent Developments
interesting article about Ham
Radio and where it sits with high tech experimentation.
See our 3G Mobile page for
info about how to make a reverse SSH 3G link into a mesh network.
See our streaming page for details of
how we stream local FM RF channels via both FEEDNET and the public
internet. DTMF control is an important part of this project and allows
us to turn on and off a variety of devces, send emails, update websites
- in fact anything you can do with your Linux Computer you can do by
sending a DTMF command on VHF or UHF.
A recent innovation is an in-band 70cm FM
repeater that provides connectivity to the FEEDNET network. This
operates just as an in-band repeater with the addition of a FEEDNET
connection. Users can patch the repeater input/output to the FEEDNET VOIP
network. A user with a 70cm handheld can talk to someone
on their telephone, controlling the link through DTMF dialling. The
telephone could even be an ordinary mobile telephone connected to
FEEDNET through its WiFi (via non-public RAYNET medium).
Well the show has been and
gone. A big thank you to all those who visited
us during the show and also to those who entered the
free draw for a Raspberry PI Model B+. Here is
the winning ticket number
If you have the winning
ticket, please send an email to
firstname.lastname@example.org and let us
know the Checksum number printed on your ticket,
together with your name and address for delivery.