Raspberry Pie

REALLY Sweet Berries!

High-Tech Night:

SDR, Raspberry Pi, and ADS-B Aircraft Tracking

Neil Goldstein - W2NDG

Welcome!

What is Raspberry Pi?

A credit-card sized single board computer Developed in the UK by the Raspberry Pi Foundation as a completely open-source project originally aimed at schools for teaching basic computer science About as powerful as an entry-level smartphone Runs operating systems designed to run on ARM processors

This is a model 'B'

Model A: 256M Ram 1 USB No Ethernet

Model B 512M Ram 2 USB Ethernet

Basic Specs

System on a chip: Broadcom BCM2835 (CPU,GPU,DSP,SDRAM,USB) CPU: 700 MHz ARM1176JZF-S core - ARM11 Family (32 Bit RISC Microprocessor) Overclocking is possible GPU: Broadcom VideoCore IV OpenGL ES 2.0 MPEG2 and VC-1, 1080p h.264/mpeg4 AVC HQ decoder 256 or 512 M shared RAM (My 'early' model B is 256) 1 or 2 USB 2.0 ports, 10/100 Ethernet (B model) HDMI, Composite (RCA), 1/8” analog stereo out SD Card for storage GPIO and JTAG headers

Layout

GPIO Header

Power

Micro USB At least 700mA @5 Volts More is better for USB support Powered USB port may be necessary

Video

Digital Output HDMI DVI w/adapter Not VGA Composite (RCA) 1900 x 1200 max

How do I get one?

$25 for the 'A' model $35 for the 'B' model Raspberrypi.org – retailers listed This one came from Allied Electronics

Accessories

Cases (Allied has a REALLY nice one) Riser boards and other GPIO accessories WiFi dongle Bluetooth Dongle Remote Control (for RASPBMC) USB Hub (powered) HDMI to DVI adapter USB Sound Card (for FLDIGI and others)

Operating Systems

Linux Raspbian (Debian) Arch XBMC Derivatives Others (Puppy, Ubuntu, etc. in early stages)

RISC OS Others (Plan 9, BSD, AROS Haiku, WebOS) Android? (Not Yet!)

Setting Up

Download an image file Use win32diskimager to write to SD SD must be CLEAN Place in Pi and boot Easy instructions at raspberrypi.org as well as the most stable OSes

Software

Via Linux package manager (Synaptic or apt-get) Not everything is ported to ARM A little slow for use as a desktop Enough is available to make it useful

How useful? …...................

How Useful?

This presentation is RUNNING on the Raspberry Pi! Was created using LibreOffice

Ham Radio

Rig Control via HamLib gRig FLDigi WSJT9 Chirp More Not fast enough to process SDR Can serve SDR (RTL-SDR and ADS-B)

More Ham Radio

IRLP Raspberry Pi DSTAR Android will eventually offer even more options

Limitations – Notes

Needs USB Sound Card ($10) for audio input I strongly recommend a good powered USB hub Might need an attenuating audio cable Quirky with certain monitors. Try plugging the Pi in, and then turning monitor on – maybe 1 – 2 seconds apart

Android?

Broadcom supposedly working on native Android Will allow the use of a Pi with any of the popular Ham Radio apps Example: A remote EchoLink station in your car, or installed inside a rig for QRZ lookups, repeater searches, many more ideas

Why?

Because we can Remote receiver at antenna, or better location away from QRM Installed INSIDE your rig? For digital modes, and rig control Even if not inside the rig, still tiny. Briefcase IRLP, and/or DSTAR, Briefcase QRP digital HF kit

Some Linux Stuff

The basic OS is command line (like dos). The GUI is called 'X' X runs in a client/server setup You can display an application anywhere you can connect to that an X server is running Interesting alternative to remote control We'll try this in a minute

RTL-SDR Dongle

Not fast enough to process Can serve the SDR stream over a network Listen to any frequency (50 MHz – 1900 Mhz) with full waterfall, any mode (AM, SSB, FM) Stream ADS-B Data (what?)

ADS-B

Automatic Dependent Surveillance-Broadcast NextGen Air Transportation System Required by 2020 in the USA Uses high-integrity GPS and a datalink Most common types operate at 1090 MHz Identification, current position, altitude, and velocity.

What will I see?

Feeding the data stream into a mapping system will show amy ADS-B equipped planes in range on a map, in motion Flight info (where available) and other information is all displayed

This is what it looks like

How do I do this?

Files and links are all at the SDR# page: www.sdrsharp.com follow the downloads link ADSB# I use Virtual Radar Server for mapping: www.virtualradarserver.co.uk Plenty of step-by-step to get running on a Windows computer Raspberry Pi as an ADS-B server is a little more complicated, but do-able I will try to get the links up at neilgoldstein.net

Let's Play!