The 15th annual GNU Radio Conference (GRCon25) will take place 8-12 September 2025 at the Edward Hansen Conference Center in Everett, Washington, in the greater Seattle area. GRCon is the premier event for the Free and Open Source Software Radio community, bringing together developers, researchers, industry leaders, and hobbyists from around the world.
Full conference details are available at gnuradio.org/grcon25.
Registration Deadline Approaching
Regular-price registration ends Friday, August 15. After that date, prices increase.
All attendees registered by August 15 will be entered into a drawing to win a HydraSDR RFOne - delivering laboratory-grade performance with 24 MHz to 1.8 GHz coverage, 12-bit ADC resolution, and GNU Radio integration.
Thanks to HydraSDR for sponsoring this giveaway - even more will be given away throughout the week.
Register now at tickets.gnuradio.org.
Main Track Sessions
Our main track sessions will include presentations from both new and returning contributors, offering insights into the latest developments in wireless communications, signal processing, and SDR hardware and applications.
We are also pleased to announce our keynote speakers:
Prof. Joshua R. Smith - Milton and Delia Zeutschel Professor at the University of Washington (Allen School of Computer Science & ECE), Director of the UW+Amazon Science Hub, and global leader in sensor systems, wireless power, and ubiquitous computing. IEEE and National Academy of Inventors Fellow.
Dr. Tom Rondeau - Principal Director for the FutureG Office, U.S. Department of Defense, and former DARPA Program Manager. Former lead of the GNU Radio project, with a career spanning open source SDR, national security, and advanced wireless research.
Bradley M. Kuhn - Policy Fellow and Hacker-in-Residence at Software Freedom Conservancy. Former FSF Executive Director, creator of the Affero GPL, and lifelong advocate for software freedom, GPL enforcement, and FOSS community infrastructure.
Jesse Alexander (WB2IFS) - Senior member of IEEE, Radio Club of America, and ARRL, with over 40 years of experience in STEM education, knowledge management, wireless systems, and amateur radio leadership.
Workshops - In Person Only
GRCon25 features a wide range of workshops available exclusively to in-person attendees.
Monday kicks off with New User-focused content and a special invited workshop:
Paul Clark - Tutorials from his new No Starch Press book Practical SDR, introducing hobbyists, students, and engineers to practical SDR concepts.
We also have Dan Boschen returning to present a new invited workshop: Quantifying Signal Quality: Practical Tools for High-Fidelity Waveform Analysis.
Additional workshops throughout the week include:
Communications Basics - Wylie Standage-Beier
Reverse Engineering a Simple Remote - Dr. Neil Rogers
GNU Radio on Embedded SDRs - Philip Balister, Toby Flynn
Simple Replay Attack Demo with GNU Radio - Murat Sever
GR4 Block Design Tutorial - Josh Morman
You Can Do Everything with MultiUSRP, and for Everything Else There is RFNoC - Marian Koop (NI)
GPU Accelerated Block Development - John Sallay
USRP FPGA Processing Using RFNoC - Neel Pandeya
Amateur Radio Exams
Amateur Radio license exams will be offered on Thursday, September 11. Please indicate during registration if you plan to take the exam. The exam itself is free, but a nominal FCC fee must be paid prior to taking it. See larc-vec.org/licensing.php for details.
Capture the Flag
GRCon25 will host its popular Capture the Flag competition, with prizes and bragging rights for the winners. A dedicated conference room will be available for participants to collaborate and work on the challenges throughout the event.
Evening Events
Monday Evening - Meet and Greet Reception for all attendees following the first day's workshops.
Wednesday Evening - Social Event sponsored by NI/Emerson, celebrating 20 years of the USRP!
Sponsors and Expo Hall
Our generous sponsors make GRCon25 possible. Most will be showcasing their products and demos in the expo hall throughout the week. See the full list at Our Sponsors.
Related Event - ZRDC 2025
The weekend following GRCon25, the Zero Retries Digital Conference (ZRDC) will be held at the same venue. This independently organized event focuses on technological innovation in amateur radio, featuring presentations and demonstrations on topics such as:
The IP400 Networking Project
M17 Digital Voice/Data System (with repeater demonstrations)
MMDVM-TNC data system (with repeater demonstrations)
AREDN, HamWAN, and other microwave networking
Details at zeroretries.org/p/conference.
Register today to secure your spot at GRCon25 and join the world's leading open source SDR community in Everett this September.