At the Shmoocon 2011 conference which recently concluded in Washington, DC, Ryan Speers and Ricky Melgares presented ZigBee Security: Find, Fix, Finish. ZigBee is a low-power, low-data rate wireless protocol based on IEEE 802.15.4. It connects lightweight embedded technology like HVAC, smart energy, security, and process automation systems, and is an attractive target as it […]
Here’s a summary by Hak5 of Bluetooth hardware attacks presented at the recent Shmoocon 2011 conference held in Washington, DC. Here the Hak5 gang interviews Michael Ossmann about project Ubertooth – a custom hardware device for sniffing and injecting Bluetooth packets. This brings monitor mode to Bluetooth, making for some interesting RF activities. The complete […]
Packet radio is a means of sending data wirelessly over radio channels, and is often used by Amateur Radio Operators. (One form is APRS, described in our earlier post.) In the video following the break you get some idea of how packet radio communications are conducted. The video uses a piece of hardware known as […]
Automatic Packet Reporting System (APRS) is a digital data communications system often used by amateur radio operators in the 2-Meter FM band. You may hear such data transmissions on 144.390 MHz FM and other frequencies. DK7IN has published an interesting project which promises to let you transmit APRS data when connected to a licensed amateur […]
Recently Travis Goodspeed posted an article about using goodfet.cc to sniff radio traffic from the Chronos watch by TI and the iClicker handheld classroom remote. In addition to the sniffing capabilities, the project can also be used to jam RF signals as well using the IM-ME device illustrated above. Via Hack a Day.
Analog Devices, Inc. announces the release of the ADuCRF101, a fully integrated System On Chip (SOC) solution designed for low power wireless applications. The ADuCRF101 integrates a low power Cortex-M3 core from ARM. It is a 32-bit RISC machine, offering up to 1.25 DMIPS peak performance. The Cortex-M3 MCU also has a flexible 14-channel DMA […]
Project Lab provides the details on how to produce a wireless robotics platform using a cheap RC toy vehicle, Arduino, XBee and Processing. The vehicle is completely controlled by the code running on the remote computer which allows very rapid prototyping of the code to tell the vehicle what to do and how to react […]
Rtty21 has posted an Instructables project using the 555 timer to build an AM radio transmitter. By adding just a transistor, several capacitors, resistors and a 5K pot you will be on the air in the 600 kHz portion of the AM dial. While the range of this transmitter is relatively short, you could possibly […]
Harald Welte and Steve Markgraf presented at 27C3 CCC in Berlin, Germany, on the OsmocomBB project, a Free Software implementation of the GSM protocol stack running on a mobile phone. This provides the security researcher a tool equivalent to an Ethernet card in the TCP/IP protocol world: a simple transceiver that will send arbitrary protocol […]
FreakLabs has an interesting project designed to conduct sniffing of protocols that ride on top of 802.15.4 such as Zigbee and 6LoWPAN (IPv6 over 802.15.4). The project utilizes their FreakDuino platform which contains an Arduino integrated with a wireless radio. The tutorial assumes that Wireshark is installed on your computer, the Chibi or chibiArduino release […]
William Dillon shares his project, including code, schematic and board file, for his RF transceiver based on the Microchip MRF49XA. Via Hack a Day
Here’s an interesting paper from Universiti Teknologi Malaysia detailing Dynamic Spectrum Access Management using Cognitive Radio System. The concepts highlighted in this presentation will become increasingly important as regulators in the US and throughout the world deal with competing needs for radio spectrum, with a corresponding impact on developers and users of RF devices.
The Parallax Propeller can output video in NTSC, PAL and VGA formats, and most users connect to a display via an RCA jack or VGA connector. Here Gadget Gangster demonstrates a quick and easy way to get broadcast video using three resistors and a piece of wire! Of course, this would appear to only work […]
SimpliciTI™ is a low-power RF protocol aimed at simple, small RF networks. This open-source software was designed for easy implementation and deployment out-of-the-box on several TI RF platforms such as the MSP430 family of low-power MCUs and the CC1XXX/CC25XX/CC430 transceivers and SoCs. Access point and range extenders are not required but provide extra functionality such […]
Here Jeri Ellsworth concludes her presentations on a homebrew TSA type body scanner by focusing on the components and coding. An FPGA is used for processing of the video signal as an alternative to a PC. The use of a “virtual ground” is an interesting aspect of the signal amp circuit.
If you live near naviagable waterways, you may want to tune your FM monitor receiver to 161.975 MHz and 162.025 MHz FM. If you hear data bursts, you are able to receive ships sending messages using the Automatic Identification System (AIS). These data transmissions are sent using GMSK modulation, and can be decoded for readout […]
New patent application #20100309806 describes a peer to peer radio system designed to utilize the “white space” between TV channels. The system receives data from RF and geolocation sensors and processes them along with information from the FCC’s white space database to assign operating frequencies on a dynamic basis.
The American Radio Relay League (ARRL) has posted a list of frequencies used by new experimental satellites. The birds were launched from Alaska in November, and transmit digital data beacons and relayed communications using the AX.25 protocol. The frequencies are in the 144 MHz and 440 MHz range amateur radio bands and can be received […]