Category Archives: digital radio data

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 … Read more

Digital audio amplifier with PLL synthesized FM radio

Another open source hardware project by Dilshan Jayakody the digital audio amplifier with PLL synthesized FM radio: This is high quality stereo digital audio amplifier with PLL synthesized FM radio receiver. Some of the high level specifications of this receiver are listed in … Read more

Digital Speech Decoder 1.7.0-dev adds D-Star support

DSD is a popular software tool for decoding various unencrypted digital radio protocols about which we’ve previously posted. We noticed that there is now a release of DSD which purports to be capable of decoding the amateur radio digital protocol … Read more

Decoding radio-controlled bus stop displays

Oona Räisänen (a/k/a Windytan) is a self-taught signals and electronics hacker from Helsinki, Finland, who is fascinated by mysteries, codes and ciphers, and vintage tech. She’s previously written regarding the use of digital transmissions carried on FM broadcast subcarriers as … Read more

EFERGY E2 Classic FSK decoding using RTL-SDR and R-Pi

Nathaniel Elijah has posted the a complete working prototype of an EFERGY E2 CLASSIC Transmission decoder using a Raspberry Pi and RTL-SDR USB Dongle. The EFERGY E2 Classic is an electrical usage monitor which displays information received from associated wireless … Read more

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 … Read more

Video: Breaking SCADA communications

In this presentation from the InfoSec 2013 conference held October 3, 2013 in Louisville, Kentucky, Mehdi Sabraoui discusses the relative insecurity of SCADA network protocols. He covers the Sixnet Tools, taking advantage of a proprietary communication protocol supported by nearly … Read more

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 … Read more

HackRF and POCSAG decoding

BinaryRF has posted a detailed tutorial on using the HackRF SDR to decode POCSAG pager traffic. He starts with the HackRF hardware connected to his Ubuntu Linux box. The basic procedure involves using gqrx, then pipingthe audio output to multimon … Read more

DIY RF Transceiver using MRF49XA and AT90USB162

William Dillon has posted his initial work on a prototype USB RF data packet Transceiver dongle using the MRF49XA and an Atmel AT90USB162 micro controller. He embarked on a journey exploring the development of packet formats and protocols, as well … Read more

RTL-SDR dsd tutorial: monitoring P25 digital voice

The crew over at RTL-SDR.com has posted a simple tutorial on using the RTL-SDR dongle and free SDR# and Digital Speech Decoder software (dsd) to monitor P25 digital radio voice comms. They describe, “Digital radio voice communications are becoming more … Read more