StratuxOpen-source ADS-B In · since 2015
Free ADS-B weather and traffic for your EFB
Stratux is free, open-source software that turns a Raspberry Pi into a dual-band ADS-B receiver. It sends FIS-B weather, traffic and GPS to the EFB apps pilots already use, over Wi-Fi.
Dual-band reception: FIS-B weather and traffic on UAT, plus traffic from 1090ES aircraft worldwide.
Standard GDL90 output for ForeFlight®-compatible setups, Garmin Pilot, FltPlan Go, Avare, iFly and many more.
WAAS GPS position, plus an optional AHRS board for a backup attitude display.
Every part can be repaired or replaced, and the software is free and open source.
What is Stratux?
Stratux is software that runs on a small Raspberry Pi computer with two radios: one for 978 MHz UAT and one for 1090 MHz. Together they receive the free ADS-B broadcasts that fill your EFB with weather and traffic: NEXRAD radar, METARs, TAFs, AIRMETs and SIGMETs, PIREPs, winds aloft, TFRs, and nearby aircraft. A GPS gives your EFB a position, and an optional AHRS board adds a backup attitude display.
The receiver creates its own Wi-Fi network. Connect your tablet, open your EFB app, and the data appears. Nothing to subscribe to, and no account to create.
You can build your own from a parts list in an afternoon, or buy a ready-to-fly unit that's assembled and tested. Either way it runs the same open-source software, and you can update it for free whenever a new release comes out.
New to ADS-B? Our pilot's guide to how ADS-B works explains Out vs. In, 978 vs. 1090, and why you won't see weather on the ramp.
Take a break from the checklists: the free Stratux Arcade has daily aviation puzzles, retro flying games and ADS-B quizzes you can play right in your browser.
Start here
Getting started
First power-up, GPS lock, and connecting your tablet.
No weather or traffic?
Why it's usually normal on the ground, and what to check in the air.
EFB apps
Which apps work with Stratux, and how to connect each one.
Update the software
Flash the latest release to your microSD card in a few minutes.
Build your own
What you need to build a DIY ADS-B receiver, and what it costs.
Ground station map
Every FAA and Canadian ADS-B tower, and the range you can expect.
From the blog
How Stratux fan control works: a 50 °C target
The Stratux fan aims to hold the CPU at 50 °C and idles at about 1% below that. See how the control loop works, what you can change and what Pi 5 means.
November 1, 2026The Great Vectorini: a free aviation fortune-teller for pilots
Feed a Hobbs quarter to a carnival seer in a flight suit. 244 fortunes, 165 pilot wisdom lines, a daily Official Forecast and a card album. Free to play.
October 23, 2026Taildragger Quest: a free 8-bit pilot adventure with a Stratux in the toolbox
A free top-down 8-bit adventure for pilots. Beat three regions, find a Stratux receiver, win your endorsements and pass the checkride in your browser.
Built by the community
Stratux was started in 2015 and has been carried forward by hundreds of contributors: developers, testers, case designers and pilots who answer questions. Join them.