Sniffing Crazyflie’s radio with HackRF blue

arnaud acquired a HackRF Blue and has been busy coding up a GNURadio project for analyzing Crazyflie radio transmissions. Crazyflie is a nano quadcopter/drone controlled over a wireless link. The Crazyradio is the official radio dongle for the Crazyflie Nano Quadcopter. It is a 2.4GHz USB radio dongle based on the nRF24LU1+ chip from Nordic […]

Reverse engineering a Verisure wireless alarm

Here’s an informative two-part series of posts over at FunOverIP detailing how to reverse engineer a Verisure wireless alarm. Part 1 details the beginning steps such as finding the modules radio frequency and modulation type, analyzing the chipset datasheet and using GNU Radio.

Tutorial: GNU Radio with the HackRF SDR

Michael Ossmann, one of the developers of the amazing and affordable HackRF SDR transceiver, is releasing a tutorial series on using GNU Radio. “This ongoing video series will be a complete course in Software Defined Radio (SDR). In this course, you’ll build flexible SDR applications using GNU Radio through exercises that will help you learn […]

Tutorials: GNU Radio for beginners

GNURadio.org has been revamping their website, updating information on the latest release. As part of this process Marcus has posted a new seven part tutorial series on GNU Radio. “Our task is to build a beginner-level tutorial, which will then live on the static part of the web site. Someone put it as an “online […]

Analysing 433 Mhz transmitters with RTL-SDR

Yashin has posted this tutorial at ArcanumX demonstrating how to read and decode 433 MHz digital data transmissions. “I intend to demonstrate how the RTL-SDR can be used to sniff 433 Mhz transmitters. These are pretty cheap and can be found in a lot of appliances including alarm sensors. This post is also intended to […]

Hak5 video: quadcopter with WiFi enabled Linux computer and RTL-SDR

What happens when you send up a quadcopter equipped with a Linux box, WiFi and an RTL-SDR dongle? Darren and company from Hak5 decided to find out. Their project used the SDR to receive ADS-B signals from aircraft hundreds of miles away. The Hak5 team took a quadcopter up on top of a high mountain, […]

How to make your own custom GNU Radio blocks – the C++ way

If you’re a GNU Radio user you know that most of the functions you need are contained the stock group of GNU Radio blocks. However, there are times when you may want to code up a custom block to perform a unique function not found on the stock blocks. Jean-Benoit Larouche has posted the first […]

Nutaq’s SDR project idea contest

Tristan Martin from Nutaq writes to inform us of their academic contest (US only) for winning a PicoSDR kit with MIMO OFDM ref design (FPGA), it supports GNU Radio (GigE and PCIe). “You can submit with an existing (ongoing) project, it doesn’t have to be a “new” project. We do NOT get involved in the […]

Video tutorial: OFDM packet transceivers with GNU radio

Orthogonal frequency-division multiplexing or OFDM is a method of encoding digital data on multiple carrier frequencies. At this presentation from them recent FOSDEM 2014 conference in Brussels, Martin Braun explained the use of GNU Radio software and an SDR transceiver to explore OFDM block basics, how to set up links between nodes and how to […]

Academic paper: hacking with RF replay attacks

If you’re new to RF hacking you may have heard the term “replay attack” and wondered what it takes to implement one. In this academic presentation Practicing a Record-and-Replay System on USRP a group of researchers from the Shenzhen Key Lab of Advanced Communications and Information Processing and Shenzhen University, give a succinct and practical […]

GRCon13 video: Some More of Your RFz Are Belong to Me

At the recent GRCon2013, SDR guru Balint Seeber delivered this presentation on using GNU Radio to create new blocks and prototype flowgraphs relating to FasTrak RFID (used in traffic toll collection system), MUltiple SIgnal Classification (MUSIC) Direction Finding, RADAR Detection and Multi-channel Decodings.

Update: HackRF based SmartNet radio monitor

We previously posted about the GNURadio based scanner for SmartNet II digital radio systems. Now Luke Berndt has updated his project info and has posted samples of the decoded system audio online. It has taken a lot of futzing, but I have my HackRF recording the Washington DC’s Fire Dept radio system and making it […]

Intro to Software Defined Radio (SDR) using cheap TV tuner dongles

If you see posts relating to USB dongle SDR’s and wonder what everyone’s talking about, this video is for you. In this presentation from last weekend’s Hack3rCon 4 conference in Charleston, WV, Justin Rogosky covers the basics relating to using the familiar RTL-SDR TV tuner dongles to monitor obscure portions of the radio spectrum.

Receiving, decoding and decrypting GSM with RTL-SDR

Domi007 has been experimenting with using the RTL-SDR dongle to receive and analyze GSM signals for research and academic purposes. He has posted a four parttutorial explaining his use of GNU Radio companion, Wireshark and other open source software to receive and analyze and decode GSM packets. The above link is for part one of […]

GNU Radio LiveDVD

A new release of the GNU Radio LiveDVD has been announced. Release 2013-0926 is based on the Ubuntu 12.04.3 LTS 64-bit operating system and is a bootable SDR environment suitable for demonstration and experimentation, contained on a read-only medium. This release now includes GNU Radio 3.7.2, gqrx v2.2.0-25, gr-air-modes, gr-iqbal, gr-osmosdr v0.1.0-11, hackrf v2013.07.1-16, osmo-sdr […]

GNURadio based scanner for SmartNet II digital radio systems

Luke Berndt posted on the HackRF-dev forum: “I built a Scanner app so I could use my HackRF to listen to my local fire department. It should work for any Moto SmartNet trunking systems that uses P25 CAI for the voice channels. It is based off the gr-smartnet code and uses DSD to decode the […]

DSD block for GNU Radio

Luke Berndt from the HackRF-dev forums has posted his work to make the functionality of DSD available to GNU Radio users in the form of a GRC block. “I have been playing around a bit and found an easy way to receive and playback digital LMR. More and more of the radio systems are going […]

RDS reception using RTL-SDR dongle

If you have a RTL-SDR dongle and Windows machine you might want to try out this simple project. It’s a proof of concept using an Ubuntu machine with GNU Radio Companion to obtain the RDS signal from the FM broadcast. Then the data is sent over TCP to a Windows 7 machine, running a .NET […]