Category: LimeSDR

Upcoming Book “Inside Radio: An Attack and Defense Guide”

Unicorn team are information security researchers who often also dabble with wireless security research. Recently they have been promoting their upcoming text book titled "Inside Radio: An Attack and Defense Guide".

Judging from the blurb and released contents the book will be an excellent introduction to anyone interested in today's wireless security issues. They cover topics such as RFID, Bluetooh, ZigBee, GSM, LTE and GPS. In regards to SDRs, the book specifically covers SDRs like the RTL-SDR, HackRF, bladeRF and LimeSDR and their role in wireless security research. They also probably reference and show how to use those SDRs in the  chapters about replay attacks, ADS-B security risks, and GSM security.

The book is yet to be released and is currently available for pre-order on Amazon or Springer for US$59.99. The expected release date is May 9, 2018, and copies will also be for sale at the HITB SECCONF 2018 conference during 9 - 13 April in Amsterdam.

The blurb and released contents are pasted below. See their promo page for the full contents list:

This book discusses the security issues in a wide range of wireless devices and systems, such as RFID, Bluetooth, ZigBee, GSM, LTE, and GPS. It collects the findings of recent research by the UnicornTeam at 360 Technology, and reviews the state-of-the-art literature on wireless security. The book also offers detailed case studies and theoretical treatments – specifically it lists numerous laboratory procedures, results, plots, commands and screenshots from real-world experiments. It is a valuable reference guide for practitioners and researchers who want to learn more about the advanced research findings and use the off-the-shelf tools to explore the wireless world.

Authors:
Qing YANG is the founder of UnicornTeam & the head of the Radio Security Research Department at 360 Technology. He has vast experience in information security area. He has presented at Black Hat, DEFCON, CanSecWest, HITB, Ruxcon, POC, XCon, China ISC etc.

Lin HUANG is a senior wireless security researcher and SDR technology expert at 360 Technology. Her interests include security issues in wireless communication, especially cellular network security. She was a speaker at Black Hat, DEFCON, and HITB security conferences. She is 360 Technology’s 3GPP SA3 delegate.

This book is a joint effort by the entire UnicornTeam, including Qiren GU, Jun LI, Haoqi SHAN, Yingtao ZENG, and Wanqiao ZHANG etc.

 
 

The LimeSDR Mini Grove Starter Kit

LimeSDR have partnered with Seeed Studio to develop a low cost SDR starter kit for learning SDR basics and experimenting with IoT applications. The kit costs US$249 and includes a LimeSDR Mini and the Grove Starter Kit. The Grove kit is simply a set of various sensors such as temperature, sound, light, ultrasonic, touch, rotary as well as interface components like buzzers, an LCD screen, and LEDs. It also includes the GrovePi+ which is a board that allows you to easily interface the Grove sensors with a Raspberry Pi. Adding a LimeSDR Mini as well as the Grove kit to a Raspberry Pi could allow for easy wireless and IoT experimentation. To make it even easier the LimeSDR team have created a ScratchRadio extension that supports the LimeSDR and Grove kit combination. ScratchRadio is a kid friendly visual programming environment.

The kit packages a LimeSDR Mini with antennas optimised for 433/868/915 MHz unlicensed bands, plus a GrovePi+ and selection of incredibly useful Grove sensors and outputs, many of which are supported by a Scratch extension. When combined with our ScratchRadio extension, this will allow the creation of simple and fun applications that integrate SDR capabilities and peripheral I/O.

Of course, use is not limited to Scratch and educational environments, and we’ll also be putting together examples that demonstrate how the kit can be used to develop applications that integrate with existing off-the-shelf systems, such as wireless thermostats and remote controls.

Kit Contents

  • 1 x LimeSDR Mini
  • 2 x Antennas optimised for 433/868/915MHz unlicensed bands use
  • 1 x Acrylic base plate
  • 1 x Short USB extension
  • 1 x GrovePi+
  • 1 x Grove - Ultrasonic Ranger
  • 1 x Grove - Temp&Humi Sensor
  • 1 x Grove - Temperature Sensor
  • 1 x Grove - Rotary Angle Sensor
  • 1 x Grove - Button
  • 1 x Grove - Light Sensor v1.2
  • 1 x Grove - 3-Axis Digital Accelerometer (±1.5 g)
  • 1 x Grove - Relay
  • 1 x Grove - Sound Sensor
  • 1 x Grove - LCD RGB Backlight
  • 1 x Grove - Buzzer
  • 1 x Grove - Red LED
  • 1 x Grove - LED Bar 2.0
  • 1 x Grove - Touch Sensor
  • 1 x Grove - Piezo Vibration Sensor

Just add your own Raspberry Pi, power supply, and microSD card!

The kit costs US$249 and is currently available for preorder on the LimeSDR Mini CrowdSupply page.

The Grove Starter Kit with LimeSDR.
The Grove Starter Kit with LimeSDR.

A Pocket DATV Transmitter and Receiver with Raspberry Pi, LimeSDR Mini and RTL-SDR

Over on YouTube user Evariste Okcestbon has uploaded a video showing his simple pocket DATV system that consists of a LimeSDR running on a Raspberry Pi Zero transmitting live camera images via DATV which is received by an RTL-SDR running on a Raspberry Pi 3.

If you didn't already know, DATV stands for Digital Amateur Television and is a digital mode somewhat similar to digital over the air TV signals that can be used by hams for transmitting their own TV signals on the ham bands. The LimeSDR Mini is a $139 US transmit and receive capable SDR that is currently crowdfunding and available for pre-order on Crowdsupply. It is expected to ship at the end of February 2018.

Evariste uses a range of software packages on each Raspberry Pi. He writes the following in the video description:

Description of a minimal Digital Tv chain : Transmitter and Receiver.

Hardware used on Tx : PiZero,Picam,LimeSDR Mini

Hardware used on Rx : Raspberry Pi 2, RTL-SDR,Monitor

Software used on Tx : avc2ts,dvb2iq,limetx

Software used on Rx : rtl_sdr,leandvb,kisspectrum,ts2es,hello_video

Softwares available on https://github.com/F5OEO
Special Thx to G4GUO, F4DAV and LimeSDR

Evariste is also the author of Rpidatv which allows you to transmit DATV directly from the GPIO pins of a Raspberry Pi without the need for any transmit capable SDR.

A Portable SDR Transceiver with LimeSDR Mini, Android Phone and QRadioLink

QRadioLink is a Linux and Android compatible radio app that can run on smartphones. It can be used to receive and transmit digital radio signals with a compatible SDR such as an RTL-SDR (RX only), or a LimeSDR Mini (TX and RX). The following video by Adrian M shows QRadioLink running on an Android phone with a LimeSDR Mini connected to it. An external battery pack is also connected to maintain power levels over a longer time.

In the video Adrian shows how this combination can be used as a fully portable radio transceiver. The video first shows him receiving broadcast FM, digital amateur radio voice (Codec2 & Opus is supported), narrowband FM and SSB signals. Later in the video he transmits a digital voice signal using the microphone on his Android phone. He notes that an external amplifier would still be needed if you wanted more transmission power.

Portable SDR transceiver: LimeSDR-mini, mobile phone and QRadioLink

 

Updates to the HF Performance of the XTRX SDR

Late last month we posted about the Fairwaves XTRX SDR which is a Mini PCIE TX/RX capable SDR with 10 MHz - 3.7 GHz tuning range and 120 MSPS sample rate that costs $199 US and is currently crowdfunding on CrowdSupply. At the time of this post the XTRX is currently 84% funded.

Recently the XTRX team released an update regarding the HF performance below 30 MHz. The update shows that signal attenuation starts to significantly reduce in the HF bands with the 3dB point being at 11 MHz. At 6 MHz the attenuation is at 13 dB, and at 2 MHz it's up to 29 dB. This attenuation may not be too bad though especially for strong HF signals, or perhaps a preamp like the LNA4HF could be used. They attempted to review their design to reduce the attenuation, but found that there is no easy fix especially with having such restricted space as in a PCIE card.

They also note that HF reception with the LMS7002 chip used on the XTRX can be problematic as the LO is fixed to a minimum of 30 MHz. So to receive below 30 MHz the receiving bandwidth needs to be increased which can cause saturation from any strong out of band signals. However, they tested with some very simple external bandpass filters for the 49m band (5.8 - 6.2 MHz) and had decent results.

The XTRX team also added a new breakout header to the board which provides direct connections to the LMS7002 chip ADCs for direct sampling. This could provide even better HF performance with an appropriate custom frontend.

XTRX HF Attenuation Graph
XTRX HF Attenuation Graph

SDR Programming For Kids: LimeSDR Mini with Scratch on a Raspberry Pi 3

Scratch is a visual block based programming language aimed at getting kids into programming. Recently the LimeSDR team have been working at creating a Scratch interface for their LimeSDR Mini. It is basically working as a wrapper/interface to the processing backend which is handled by LuaRadio.

The idea is to keep the barrier of entry to SDR as low as possible, by making SDR programming accessible to kids as well. The software is currently a work in progress, but they write that they are attempting to develop the Scratch blocks necessary to enable the transmission and reception of text messages. Something like that would make a great learning tool for educators.

The video demo shows Scratch and the LimeSDR running on a Raspberry Pi 3. During the demo he creates a simple 433 MHz spectrum display by connecting up several blocks.

Scratch running with a LimeSDR Mini on a Raspberry Pi
Scratch running with a LimeSDR Mini on a Raspberry Pi

LimeSDR Mini Updates: Demonstrations with Universal Radio Hacker, LattePanda, PothosSDR and GNU Radio

Over on their CrowdSupply crowdfunding site LimeSDR have been releasing several short tutorials and demonstrations showing their new LimeSDR Mini in action. The latest update shows a short tutorial on using the LimeSDR Mini together with Universal Radio Hacker (URH) to reverse engineer a 433 MHz remote control. 

Other previous updates include showing how to use the LimeSDR Mini and Wireshark to analyze WiFi signals, using it with a LattePanda mini computer, creating an FM demodulator in PothosSDR and decoding a 433 MHz keyfob in GNU Radio.

The LimeSDR Mini is a smaller and cheaper version of their LimeSDR which has slightly reduced specifications. The main changes are the slightly restricted frequency range of 10 MHz – 3.5 GHz, and half the maximum bandwidth at 30.72 MHz. The mini also only has 1×1 TX/RX channels. 

Recently the LimeSDR was released for crowdfunding on crowdsupply.com and already has raised $165,000 of it’s $100,000 threshold with 12 days remaining. Currently you can back the project for $139 with shipping expected on Dec 31.

LimeSDR Mini Renderings
LimeSDR Mini Renderings

LimeSDR Transmitting on the LattePanda

Just last week we posted about how Marty Wittrock was able to get his LimeSDR receiving perfectly on his LattePanda mini Windows 10 PC with SDRAngel. Now Marty has uploaded a new video which shows the LimeSDR running on the LattePanda and SDRAngel again, but this time transmitting 40m LSB voice. At this stage Marty is well on his way to creating a fully portable LimeSDR based ham transceiver. He writes about his setup:

Setup: LattePanda Win10/64-bit, LCD, Capacitive Touchscreen, LimeSDR and SDRAngel Win32 with a transmit device loaded…Also using a USB 2.0 audio device to make the microphone and speaker audio connections…WORKS GREAT..!!

The LimeSDR is a RX and TX capable SDR with a frequency range of 100 kHz – 3.8 GHz, bandwidth of up to 61.44 MHz, 12-bit ADC and 2×2 RX/TX channels. Recently the LimeSDR team have been crowdfunding for their new ‘LimeSDR Mini’ which is a smaller and cheaper feature reduced version of the standard LimeSDR. While all the early bird $99 USD units have been sold out, they are still available at the $139 USD price. Currently the crowdfunding campaign has already reached it’s $100,000 USD target with 35 days left.

One important ‘feature reduction’ to note is that the LimeSDR Mini can only tune down to 10 MHz, so it may not be as useful as the full $289 USD LimeSDR for creating a SDR based ham transceiver like what Marty is doing.

LimeSDR, LattePanda, and SDRAngel Transmitting on 40m LSB Voice