Category Archives: RF

Project: extracting and geographically plotting DTRS site information

in digital radio data, RF by the machinegeek | 0 comments

Lui Gough has been researching the Australian railroad system’s new digital radio system and has posted detailed observations: As a radio enthusiast, and highly observant public transport user, I’ve made many notes about the deployment of the new Digital Train … Read more

Interfacing the STM32VLDISCOVERY with Semtech’s SX1272RF1BAS module

Milen Pavlov with Netblocks wrote this post on connecting a STM32VLDISCOVERY with Semtech’s SX1272RF1BAS module (LoRa sx1272 transceiver.) This module incorporates the LoRa spread spectrum modem which is advertised as achieving significantly longer range than existing systems based on FSK … Read more

Garage door signal hacking using RTL-SDR and TI Chronos watch

in hacks, RF, SDR, wireless by the machinegeek | 0 comments

Students Ido Livneh and Gil Freidlin from Tel Aviv University have been experimenting with garage door opener signals using the TI Chronos watch and RTL-SDR dongle. Their technique involves using the SDR along with HDSDR software to acquire and record … Read more

Video tutorial: OFDM packet transceivers with GNU radio

in RF, SDR, tutorials, Videos by the machinegeek | 0 comments

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 … Read more

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 … Read more

Listening to D-STAR digital voice with DSD 1.7

in code, open source, RF, SDR by the machinegeek | 1 comment

Brazilian amateur radio operator PU2VLW has written a post (in Portugese) detailing how to use DSD version 1.7 to decode amateur radio D-STAR digital voice transmissions. (Google translate may be helpful.) DSD can be downloaded as source from GitHub. His … Read more

DCC/TAPR video: FreeDV, CODEC2 and “The HT of the Future”

In this presentation from the 2013 Digital Communications Conference, Bruce Perens K6BP discusses FreeDV, CODEC2 and “The HT of the Future”. Bruce is active in advancing interest in open-source digital voice to Amateur Radio on both HF and VHF/UHF. Here … Read more

RTL_FM_Python: An API and web interface for controlling RTL_FM

in open source, RF, SDR, software by the machinegeek | 0 comments

Here’s an interesting piece of open source code known as RTL_FM_Python for controlling the RTL-SDR dongle. “This is a Python library built upon the RTL-SDR project and allows you to use the RTL-SDR dongle to tune in arbitrary stations either … Read more

BLE fun with Ubertooth: sniffing Bluetooth Smart and cracking its crypto

Mike Ryan writes about his latest efforts in BLE hacking. Hot on the heels of Omri Iluz’s BLE-sniffer-on-the-cheap, I decided to write up the BLE sniffer I built on Ubertooth. My sniffer highly robust, can capture data from connections, and … Read more

30C3 video: Monitoring the Spectrum – Building Your Own Distributed RF Scanner Array

in hacks, RF, SDR, Videos by the machinegeek | 0 comments

At the recent 30C3 conference in Hamburg, Germany, Andrew Reiter outlined his efforts in using inexpensive RTL-SDR dongles to build a distributed RF scanner array for monitoring and spectrum mapping. Software-Defined Radio (SDR) has increased in popularity in recent years … Read more