Category Archives: RF

OpenSprinkler Firmware 2.1.1 new feature: Control remote power sockets

in open source, RF by DP | 0 comments

We previously covered Ray’s OpenSprinkler. Now it has added a new feature to remotely toggle radio frequency power sockets: This allows OpenSprinkler to not only switch sprinkler valves, but also easily control powerline devices such as lights, heaters, pumps, fans. … Read more

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 … Read more

Introducing RFToy, an Arduino-compatible gadget for radio frequency modules

in Arduino, RF by DP | 8 comments

Ray Wang from RaysHobby has informed us of his latest open-source project called RFToy: it’s an Arduino-compatible microcontroller board for interfacing with radio frequency (RF) modules, such as the popular 433/315MHz transmitter/receiver, and the nRF24L01 transceiver. The RFToy has a built-in … Read more

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