TNC-Pi Raspberry Pi Packet Radio Board

TNC-Pi kit built by Nick Bown 2E0CGW

TNC-Pi kit built by Nick Bown 2E0CGW

The TNC-Pi is a £22 ($40) KISS TNC board which is designed to connect to the GPIO port of the £25 ($35) Raspberry Pi computer board.

It provides a low cost means of using amateur radio AX.25 Packet Radio and APRS.

Nick Bown 2E0CGW has written a well illustrated review of the board. You can download the PDF from TNC-Pi by Nick Bown 2E0CGW

The TNC-Pi kit is available from

Raspberry Pi at RSGB Convention

A Raspberry Pi computer board

A Raspberry Pi computer board

Peter Goodhall 2E0SQL, a well known amateur radio satellite operator, will be giving a presentation on the Raspberry Pi computer board at the RSGB Convention this weekend .

Peter Goodhall 2E0SQL operating portable through the satellites

Peter Goodhall 2E0SQL operating portable through the satellites

The popular Raspberry Pi has been used for many different amateur radio applications. Peter’s presentation will be given at 14:30-15:15 on Saturday, October 12.

The RSGB’s Centenary Convention, sponsored by Martin Lynch & Sons, takes place this weekend (Fri eve-Sun) October 11-13 at Horwood House, MK17 0PH just a few miles outside Milton Keynes. Tickets are available on the door.

RSGB Convention Schedule

RSGB Centenary Convention

Over a million Raspberry Pi’s have been manufactured in the UK

SSB using a Raspberry Pi

Turning the Raspberry Pi into a 1-250 MHz FM Transmitter

Successful Kickstarter for Raspberry Pi LunarSail CubeSat

LunarSail Graphic

LunarSail Graphic

LunarSail is an Open-Source Cubesat and Solar Sail Lunar Orbiter project. Matthew Travis used Kickstarter to raise funds and comfortably exceeded his target of $11,00 by getting pledges for $15,817.

The team say “LunarSail’s computer is based on the Raspberry Pi, which is a complete Linux-based single-board computer running on an ARM processor”.

LunarSail aims to be the first “amateur” satellite to reach lunar orbit and hopes to get a free launch via the NASA CubeSat Launch Initiative. The team plan to submit a proposal by November 26.

LunarSail is an effort to demonstrate the ability of a spacecraft under solar sail propulsion to navigate itself into a lunar trajectory and insert itself into Lunar orbit. A primary objective of the LunarSail mission is to serve as a testbed for CubeSat operations beyond low Earth orbit and applications requiring cislunar or interplanetary rendezvous.

LunarSail plans to take advantage of the CubeSat platform to conduct a first of its kind mission to use a solar sail to send a spacecraft to the Moon and then utilize the sail’s unique characteristics to navigate into lunar orbit.

LunarSail on Kickstarter

ARES Institute

Giant leap for radio ham’s Pi-powered teddy bear

2013-08-26--14-45-58-PIE-51FBBC News reports on radio amateur Dave Akerman M6RPI‘s successful 434 MHz balloon flight on Monday, August 26, 2013.

The balloon carried transmitters on 434.200 MHz and 434.250 MHz and transmitted images using the amateur radio Slow Scan Digital Video (SSDV) standard, they are available here.

The BBC say:

A soft toy controlled by a Raspberry Pi computer has re-created Felix Baumgartner’s record-breaking skydive.Mr Baumgartner made the highest ever freefall in October 2012 when he jumped from a balloon about 39km up.

A bear called Babbage has now leapt from a similar height after ascending beneath a hydrogen-filled balloon.

The Raspberry Pi low-cost micro-computer inside Babbage transmitted his position and shot stills and video throughout the flight and descent.

Read the BBC news story at

See the SSDV images at

Slow Scan Digital Video (SSDV) Guide

Dave M6RPI website

Dave M6RPI had made an initial attempt on Saturday but the bear’s release mechanism didn’t work

To get details of upcoming UK balloon launches subscribe to the UKHAS Mailing List by sending a blank email to this address:

UK 434 MHz balloons over Central Europe

A Raspberry Pi computer board

A Raspberry Pi computer board

On Saturday, April 13 at 1000 UT, two balloons both carrying 434 MHz transmitters were launched from Cambridge, UK . One transmitting video images from a Rapsberry Pi computer board, the other carried a 144.800 MHz APRS beacon M0UPU-11 in addition to the 434 MHz beacon.

The first balloon PIE5 is flying a Raspberry Pi computer board which transmitted live Slow Scan Digital Video (SSDV) images back to the ground by a pair of transmitters to double the bandwidth. The data was RTTY 300 baud 8N2. The frequencies used were 434.070 and 434.074 MHz. The balloon call sign was $$PIE.

The second balloon AVA flew a 70cms tracker on 434.450 MHz 50 baud 7N2. Additionally once it entered air space where the airborne use of APRS is permitted a second APRS transmitter was enabled (the APRS frequency is 144.800 MHz) with the call sign M0UPU-11.

The balloons had been expected to head for Poland and on Saturday evening they were over Germany but by early Sunday morning PIE5 was over Switzerland and AVA was over Austria.

The 434 MHz downlinks  on the balloons are generated using Radiometrix NTX2 transmitter modules, the batteries were expected to last 24 hours.

A third balloon callsign XABEN transmitting on 434.350MHz, 470Hz shift, 7N1 was also launched. Tthis was configured to have a short lifetime, going straight-up until the balloon burst rather than floating at 30km across Europe.

Live video of the launch was streamed by the British Amateur TV Club (BATC) at

Tracks of both balloons are at

Direct link to M0UPU-11 APRS track!call=a%2FM0UPU-11&timerange=86400&tail=86400

Images from the PIE5 Raspberry Pi balloon transmitted using SSDV can be seen at

To get details of upcoming launches subscribe to the UKHAS Mailing List by sending a blank email to this address:

Twitter #ukhas

Beginners Guide to Tracking using dl-fldigi

Digital Slow Scan Video

PIE1 – Raspberry Pi Sends Live Images from Near Space

A Raspberry Pi

Dave Akerman M6RPI has used a Raspberry Pi computer board as the flight computer on a High Altitude Balloon (HAB) and sent back live images from near space at an altitude of almost 40 km.

SSDV picture from a previous PIE balloon - Image credit Dave Akerman M6RPI

SSDV picture from a previous PIE balloon – Image credit Dave Akerman M6RPI

The balloon, appropriately called PIE1, was launched from Brightwalton, in Berkshire on July 14, 2012. The images were transmitted on 434.650 MHz (300 bps, 600 Hz shift) in the amateur radio 70cm band using the Slow Scan Digital Video (SSDV) standard.

PIE1 reached an altitude of 39,994 metres and images were received as far away as Northern Ireland (that’s over 500 km, not bad for just 10 mW on 434.650 MHz!).

See the images sent by PIE1

The full story and pictures are on Dave Akerman’s website

Read The Register article

Slow Scan Digital Video (SSDV)

UK High Altitude Society

High Altitude Balloons have featured at a recent AMSAT-UK International Space Colloquium in Guildford.

You can watch a video online of the presentation that Cambridge University Spaceflight gave called “Teddy Bears in Space” at
In the Archive List category box select AMSAT then click Select Category then in the stream box select Teddys and click on Select Stream

Or download a copy of the video at

This years AMSAT-UK International Space Colloquium takes place Sept. 15-16 details at