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Nooelec RTL-SDR giveaway at AmateurRadio.com

December 6, 2013, 2:19 pm
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AmateurRadio.com has teamed up with Nooelec.com to give away RTL-SDR packages to 10 hams. To be eligible to enter the competition, you must be a registered amateur radio operator, and you must comment on the competition page. The prizes are: Two (2) Complete HF sets including NESDR Mini receiver and accessories; Two (2) Complete Touch SDR sets including the NESDR Nano receiver and accesories; Three (3)bNESDR Mini receivers; and Three (3)bNESDR Nano receivers.

The competition runs until the 11th of December.

Remember, only comments on the AmateurRadio.com competition page are eligible for the contest, not those posted here.

Via RTL-SDR.com.

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Ham Radio Linux LiveDVD Ver. 14 supports RTL-SDR, HackRF and more

December 15, 2013, 5:07 pm
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Andy, amateur radio operator KB1OIQ, has released the Version 14 of his Ham Radio Linux LiveDVD containing programs focused on amateur radio and SDR operations.

This is a remastered version of Ubuntu Linux. As of version 13, there are 32-bit and 64-bit versions available, as well as an image for the PengPod 1000.

This version contains a lot of amateur radio software including Fldigi, NBEMS, Gpredict, earthtrack, xcwcp and qrq, XLog and cqrlog, flrig and grig, xnec2c, fl_moxgen, aa-analyzer, owx, VOACAP, glfer, Xastir, gqrx, gEDA, and more!

Version 14 adds GNU Radio Companion, quisk, direwolf, linamc, FreeDV, wsjt-x, and Micro-Fox 15 Config (GPL), and many updates.

Recommended system requirements are a 1GHz CPU and 512MB memory at an absolute bare minimum (gqrx will require more – about twice as much).

Links to the ISO downloads can be found on Andy’s Sourceforge page.

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Improved digital voice P25 decoding with DSDPlus

December 27, 2013, 8:20 pm
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We previously posted about the DSD digital decoding software and it’s usefulness with the RTL-SDR dongle and other signal sources. Now there’s a newly released version known as DSDPlus which promises to deliver improved decoding and clearer audio of unencrypted APCO Project 25 (P25) radio signals.

This program is designed to be used with your RTL-SDR receiver software such as SDR#, with the receiver’s output piped to the DSDPlus program using a program such as Virtual Audio Cable or similar. Unfortunately, DSDPlus is a Windows-only offering at this time, and the anonymous author isn’t releasing the source.

DSDPlus is available for download from MEGA. You can find more the program user guide in the README file.

Via RTL-SDR.com.

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Sniffing and decoding NRF24L01+ and bluetooth LE packets for under $30

January 22, 2014, 11:00 am
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Omri writes:

In this long post I am going to describe my journey to sniff and decode popular digital wireless protocols off the air for very cheap. So cheap practicality anyone can obtain the equipment quickly.
I was able to decode NRF24L01+ and Bluetooth Low Energy protocols using RTL-SDR.
As far as I can see, this is the first time the NRF24L01+ is being decoded, especially considering the low entry price for the hardware. Given the extreme popularity of this transceiver, we are likely to see a wave of hackers attacking the security of many wireless gadgets, and they are likely to succeed as security is usually the last priority for hardware designers of such cheap gadgets.

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

January 26, 2014, 4:48 pm
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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 due to the decrease in hardware costs and increase in processing power. One example of such a class of devices is the RTL-SDR USB dongles based on the Realtek RTL2832U demodulator. This talk will discuss my experience in building a distributed RF scanner array for monitoring and spectrum mapping using such cheap SDR devices. The goal is to help the audience understand the what, why, and how of building their own RF monitoring array so that they will be able to do it themselves. In this era of increasingly being “watched’’, we must be prepared to do our own “watching’’.

Well said…

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RTL_FM_Python: An API and web interface for controlling RTL_FM

February 5, 2014, 5:43 pm
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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 with a simple web application running on a built-in server, or programmatically with Python or any language using the REST API provided.”

The code is available on GitHub.

Via RTL-SDR.com.

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RTLAMR: an RTL-SDR receiver for 900 MHz smart meters

February 14, 2014, 6:48 pm
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It never ceases to amaze how many projects are developed making use of the RTL-SDR dongle. Bemasher has developed a software tool which interprets the signals in the 900 MHz ISM band sent from smart electric meters which are growing in popularity among utility companies.

This project is a proof of concept software defined radio receiver for these messages. We make use of an inexpensive RTL-SDR dongle to allow users to non-invasively record and analyze the commodity consumption of their household.

Currently the only known supported and tested meter is the Itron C1SR. However, the protocol is designed to be useful for several different commodities and should be capable of receiving messages from any ERT capable smart meter.

Project information can be found on Bemasher’s site. The code is available on GitHub.

Via RTL-SDR.com.

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RTL-SDR wide spectrum analyzer

March 14, 2014, 5:01 pm
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Claudio Giuliani has designed an RTL-SDR based wide spectrum analyzer.

The code is available on AlterVista. Software prerequisites are a Linux box (no Windows/OSX version) with Gnuradio and rtl_sdr utilities installed. The spectrum analyzer program is a frontend GUI of rtl_power for spectrum visualization and control and is coded in Basic for Gambas (a sort of VisualBasic for Linux.)

Via RTL-SDR.com.

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Hak5 video: quadcopter with WiFi enabled Linux computer and RTL-SDR

April 21, 2014, 11:00 am
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What happens when you send up a quadcopter equipped with a Linux box, WiFi and an RTL-SDR dongle? Darren and company from Hak5 decided to find out. Their project used the SDR to receive ADS-B signals from aircraft hundreds of miles away.

The Hak5 team took a quadcopter up on top of a high mountain, attached to it a WiFi Pineapple (a small WiFi equipped Linux computer), an RTL-SDR dongle and a coax collinear antenna and then flew it up high. They ran dump1090, a Linux based ADS-B decoder on the WiFi pineapple and then broadcast the decoded information back to a laptop on the ground.

Although the results were less than favorable, it is still an interesting project to explore. Their poor results may be due to a nearby RF broadcast tower which could have been overloading the dongle, or EMF from the quadcopter motors.

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

July 4, 2014, 5:01 pm
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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 the signal, which is then analyzed using Python based tools and encoded for loading onto the Chronos RF wristwatch.

The project report is available as a 23 page PDF download.

Via RTL-SDR.com.

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Viewing a VHS tape using RTL-SDR and TV Sharp software

November 18, 2014, 10:46 am
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Here’s a different and unconventional way to view a VHS tape (as if VHS tapes aren’t considered unusual enough today). DogsRNiceMineCraft posted this video on YouTube showing video received using an RTL-SDR dongle.

I got a VCR today and wanted to see if I could receive the signal from the RF out using TV sharp. I wrapped the antenna cord that came with my dongle around the RF out cable from the VCR, but it only works if the cable is barely touching the RF out port.

An unusual proof of concept which could have other applications.

The TV Sharp program referred to by the video’s poster appears to be available for download from radioamatoripeligni.it (Note: website primary language is Italian.) It allows reception of certain analog video signals using the RTL-SDR.

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Chrome RTL-SDR receiver app updated

January 11, 2015, 8:00 am
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When it comes to the RTL-SDR dongle, there’s an app for that! (At least a Chrome app.) The Chrome app store has the updated RTL-SDR Radio Receiver app available for download. It’s free and open source and is written 100% in Javascript. “Receive and listen to FM and AM radio broadcasts on your browser or ChromeBook using an RTL2832U-based USB digital TV tuner.”

Source code available on Github under the Apache 2.0 license.

Via RTL-SDR.com.

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YOUSDR remote RTL-SDR software

April 6, 2015, 3:21 pm
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Sixuniform has released YOUSDR v0.1 Alpha, an RTL-SDR webinterface for Raspian / Raspberry Pi. This is a web-wrapper for the rtl-sdr softwares. Currently it commands rtl_fm, rtl_tcp and dump1090.

The software can be downloaded from its GitHub. The instructions on the GitHub page show how to set it up on a Raspberry Pi running Raspbian, but the instructions should also be valid for other Linux distributions. As the software is new the authors are welcoming any improvements and feedback.

Via RTL-SDR.com.

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Android flight tracker uses ADSB data from RTL-SDR

May 3, 2015, 5:01 pm
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ADSB_RTLSDR
Nikos has developed an Android app which works with the RTL-SDR dongle to demodulate the ADSB signal from aircraft and overlays the position of the aircraft on a high resolution offline map. So the user can use the App without Internet connectivity, on board an aircraft in real time!

Nikos’ “Track your flight Europe” app is available from Google Play.

Via the contact form.

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Building a better RTL-SDR TCXO

March 22, 2016, 7:30 am
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Craig posted an article describing how he built a 28.8MHz RTL-SDR TCXO, that is available on github:

Here’s a scratch-built 28.8MHz TCXO capable of +-1ppm stability from 0C-55C; best of all, it’s not only easy to build, but is designed entirely from readily available and inexpensive components. For improved temperature stability, the main oscillator can even be replaced with one of many commercially available TCXOs!

More details at Analog Zoo project page.

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MFJ-1708SDR transmit/receive switch for SDR receivers

March 30, 2018, 6:22 am
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Here’s a demonstration of the MFJ-1708SDR transmit/receive automatic relay switch from YouTube channel HamRadioConcepts .

Here is an interesting device, for use with your SDRplay or other SDR dongle for receive. You can share your current antenna with your 100 watt HF rig and an SDR for receive.

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Tutorial: Setting up a low cost QRP (FT8, JT9, WSPR etc) monitoring station with an RTL-SDR v3 and Raspberry pi 3

June 19, 2018, 4:56 pm
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qrp_ft8_jt965_wspr_2

A detailed tutorial on how to set up a cheap QRP monitoring station using an RTL-SDR V3 and a Raspberry Pi 3 from rtl-sdr.com

This tutorial is inspired by dg0opk’s videos and blog post on monitoring QRP with single board computers. We’ll show you how to set up a super cheap QRP monitoring station using an RTL-SDR V3 and a Raspberry Pi 3. The total cost should be about US $56 ($21 for the RTL-SDR V3, and $35 for the Pi 3).
With this setup you’ll be able to continuously monitor multiple modes within the same band simultaneously (e.g. monitor 20 meter FT8, JT65+JT9 and WSPR all on one dongle at the same time). The method for creating multiple channels in Linux may also be useful for other applications. If you happen to have an upconverter or a better SDR to dedicate to monitoring such as an SDRplay or an Airspy HF+, then this can substitute for the RTL-SDR V3 as well.

More details at rtl-sdr.com.

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An open source VOR receiver for Airspy and RTL-SDR

November 20, 2018, 2:57 pm
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A simple VOR receiver for Airspy and RTL-SDR called Vortrack by Thierry Leconte, that is available on GitHub:

In the past we’ve seen several other posts about RTL-SDRs being used to decode VOR signals, but Thierry’s implementation appears to be the easiest way to get a bearing straight away. You’ll get the most use out of the software if you install it on a portable device like a Raspberry Pi and take it out for a drive as you’ll be able to see the VOR angle changing then.

Via RTL-SDR.com.

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A low cost 2-4 GHz Downconverter from off the shelf dev boards

July 18, 2019, 4:42 pm
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Ian Wraith designed and built a low cost 2-4 GHz downconverter for an SDR, that is available on Github:

I recently became interested in exploring some of the signals found in the 2.4 GHz ISM band. The problem is that my favourite SDR (Software Defined Radio) an Airspy R2 only covers up to 1.7 GHz. Initially I looked at buying an SDR that could cover the 2.4 GHz band but found either that they were to expensive , had poor performance or weren’t supported by my SDR control software of choice. So I decided it would be best to build a downconverter to take the 2.4 GHz down by 1 GHz so it could be monitored by my Airspy.

Via rtl-sdr.com.

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A homebrew all-in-one RTL-SDR with screen and control knobs running on a mini pc

November 25, 2019, 3:18 pm
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