Search results for: mantz

Automatically Starting rtl_tcp on a Remote PC via Android

Over on his YouTube channel M Khanfar has put together a tutorial for an interesting idea. The idea is to use an automatic SSH connection to tell your Windows PC to run rtl_tcp whenever you open SDRTouch or RFAnalyzer on your Android device. SDRTouch and RFAnalyzer are both Android based SDR applications and rtl_tcp is a server which allows both apps to connect to a remote RTL-SDR over a network connection.

To set this up, Khanfar first sets up OpenSSH on his Windows PC which allows a secure remote connection to the PC. On his Android device he then installs MacroDroid and RaspController. MacroDroid is an app that help you automate tasks on your Android device, and RaspController is an app designed for remotely controlling a Raspberry Pi, but also works on Windows via the SSH connection. These apps are then setup so that an SSH connection to the Windows PC is automatically opened whenever SDRTouch is run. From within the SSH connection rtl_tcp is then started.

Full text instructions are available in the video description.

Automate MacroDroid with RTL_TCP through OpenSSH under Windows 10

Android App RFAnalyzer Now on Google Play with Support for the RTL-SDR

Previously we posted about the new RFAnalyzer Android app for the HackRF which has a RF spectrum and waterfall display. Now RFAnalyzer is available on the Google Play store with experimental support for the RTL-SDR dongle. The app also now supports AM and FM audio demodulation.

The app is fully open source and the code and APK can be downloaded for free from its Git repository. Alternatively, the app can be downloaded from the Google Play store at a small cost of $0.99 USD.

To use the app you’ll need a USB OTG cable to connect your HackRF or RTL-SDR to your Android phone. More information on the app can be found on the authors blog.

An alternative Android app to RFAnalyzer is SDR Touch.

RF Analyzer Android App for the HackRF and RTL-SDR
RF Analyzer Android App for the HackRF and RTL-SDR

RF Analyzer Android App for the HackRF

Earlier this month we posted about a new port of the HackRF software defined radio Linux library for Android. Now the author of the Android port has created a new app called RF Analyzer. The app is basically a real time spectrum viewer that includes a waterfall display. The app can be downloaded from Github at https://github.com/demantz/RFAnalyzer.

The app currently supports the following features.

  • Browse the spectrum by scrolling horizontally
  • Zoom in and out, both horizontally and vertically
  • Adjust the sample rate and center frequency to match the current view of the screen by double tapping
  • Auto scale the vertical axis
  • Jump directly to a frequency
  • Adjust the gain settings of the HackRF
  • Select a pre-recorded file as source instead of a real HackRF
  • Change the FFT size
  • Setting the frame rate either to a fixed value or to automatic control
  • Activate logging and showing the log file

In the future the author intends to support the RTL-SDR and implement demodulation for basic modes such as AM, FM and SSB.

To use the app you’ll need an USB OTG (on-the-go) cable to connect your Android device to the HackRF.

RF Analyzer Android App for the HackRF
RF Analyzer Android App for the HackRF
RF Analyzer demonstration – Showing a FFT plot by using an Android device and the HackRF

Using the HackRF on Android

Micheal Ossmann’s HackRF Linux library has recently been ported to Android by programmer Dennis Mantz. Dennis has also made a blog post showing how to use the library. In addition he’s uploaded a YouTube video showing off the library using an example app. The app is capable of recording an RF signal and replaying it via the HackRF’s TX capabilities. In the video Dennis shows the example app recording a broadcast FM station and then retransmitting the recording to his car radio.

Using the HackRF on an Android Device

The BIG List of RTL-SDR Supported Software

There are now dozens of software defined radio packages that support the ultra cheap RTL-SDR. On this page we will attempt to list, categorize and provide a brief overview of each software program. We categorize the programs into general purpose software, single purpose software, research software and software compatible with audio piping.

If you know of a program that is missing please leave a comment in the comments section at the bottom of the page.

13/02/2014 - Added Sodira, gr-wmbus, rtlsdr-waterfall, QTRadio, multimon, sdrangelove, lte-scanner, rtl_tcp, rtl_sdr_FS20_decoder.
17/02/2014 - Updated the Linrad description.
28/04/2014 - Added Modesdeco and Trunk88.
30/05/2014 - Added RTL Panorama, RTL SDR Panoramic Spectrum Analyzer, Chrome Radio Receiver, SeeDeR, DAB Player, RTL SDR Installer, PD/Max Wrapper, SDRWeather, LTR Analyzer, softEOT/softDPU and ScanEyes.
26/07/2014 - Added PiAware, OOK-Decoder, rtl_fm_python, rtl_power heatmap viewer, RTL Bridge, threejs-spectrum, CANFI Software, PNAIS, FLARM Decoder, Xastir, RTLSDR-Airband, SDRTrunk.
13/11/2014 - Added Touchstone, RFAnalyzer, RTL1090 XHSI Interface, Parus Decoder, PlotRTL1090, LRPT Decoder.
05/02/2015 - Added rtl_tool_kit, CubicSDR, OregonWeather, FreqWatch.
15/04/2015 - Added ADSBox, YouSDR, FlightAware Flight Feeder, Frequensea, Track your flight EUROPE, QSpectrumAnalyzer, Doppler & Demod, Redsea, rtl_heatmap, gr-gsm, driveby, SDRecord.
23/12/2015 - Added Remote rtl_udp, AISRec, dump978, AISDeco2, SDRrecorder, OpenWebRX, dsame, RTL-Widespectrum, rtl_ais, rtl_gopow, ham2mon, rtl_ais_android, inmarsatdecoder, spektrum, qtcsdr, rtl_power_fftw, JAERO, GNSS-SDRLIB, SVxLink.
8/09/2017 - Added inspectrum, gr-isdbt, telive, tetra-listener, gr-iridium, SDRuno, luaradio, rx_tools, kukuruku, chronolapse, cloud-sdr, natpos, d3-waterfall, SDRDue, gqrx-ghostbox, ships, rtlmic, tsl-sdr, universal radio hacker, dumpvdl2, re-dected, aerial-tv, questasdr, welle.io, spyserver, dspectrumgui, atcsmonitor, NRSC5 HD Radio Decoder, leandvb, imsi-catcher, block stream receiver, salamandra, deinvert, RS.
6/11/2017 - qradiolink
15/06/18 - Zeus Radio
11/01/19 - SCEPTRE
13/01/20 - VDLM2DEC, Blockstream Satellite, TempestSDR, rtlsdr-wsprd, rtl_map, Radwave, radiosonde_auto_rx, XRIT Decoder, SATNOGS, SigintOS, RadioCapture, EMI_Mapper, xrit-rx (KOMSAT 2A), RTLion, WSJT-X, noaa-apt, rtlSpectrum, fingerprinting_radios_w_ML, mySdrPlayback, QO-100_SSB-WebSDR_DATV-WebSpectrum, goestools, SigDigger, Tekmanoid EGC, Scytale-C, PEPYSCOPE, iridium-toolkit, Electrosense, ORBCOMM-receiver, r2cloud, coole-radar, vor-python-decoder, IridiumLive, radio_analyser, DSDPlusUI, retrogram-rtlsdr, vortrack, rtl_power-fm-multipath, glrpt, Spektrum SV Mod, gammaRF, SegDSP, rtl-ultrasound, radiosondy.info, OP25, RS41 Tool, TETRA Trunk Tracker, meteor_demod, FreqShow, rtl_tcp SDR, PLSDR, SDR Receiver, Echoes, rtlmm, FM2TXT, cnn-rtlsdr, Meteor Logger.
04/03/21 - SDR++

General Purpose RTL-SDR Software

We define general purpose SDR software as programs that allow the RTL-SDR to work like a normal wideband radio receiver.

SDR# (Windows) (Free)

SDR#
SDR#

SDR# (pronounced "SDR Sharp") is the most popular free RTL-SDR compatible software in use at the moment.  It is relatively simple to use compared to other SDR software and has a simple set up procedure. We have a full overview of the installation procedure on our Quick Start Page. SDR# is designed to be use with the $199 Airspy SDR, but works just fine with the RTL-SDR.

SDR# is a simple to use program that also has some advanced features. It has a useful modular plugin type architecture, and many plugins have already been developed by third party developers. The basic SDR# download without any third party plugins includes a standard FFT display and waterfall, a frequency manager, recording plugin and a digital noise reduction plugin. SDR# also decodes RDS signals from broadcast FM.

HDSDR (Windows) (Free)

HDSDR
HDSDR

HDSDR is based on the old WinRAD SDR program. HDSDR supports the RTL-SDR through use of an ExtIO.dll module. To install HDSDR, download the program from the link on the main HDSDR page, then to use the RTL-SDR you will need to download the ExtIO_RTL2832.dll file an place it into the HDSDR folder. When opening HDSDR, select the newly copied ExtIO_RTL2832.dll. The other dlls that come with HDSDR will not work with the RTL-SDR, even though they have RTL-SDR in their filename. The official installation instructions can be found here.

Along with a FFT display and waterfall, HDSDR has some extra advanced features. Users will also find an Audio FFT and waterfall display on the bottom of the screen. The output audio can also be bandpass filtered by dragging the filter borders on the display. Bandpass filtering the audio can really help clean up a noisy signal. The audio processing also supports placing of notch filters either manually or automatically. There are also noise reduction and noise blanker features and an automatic frequency centering algorithm which will automatically center the signal, so you don't need to click exactly in the center of a signal. Traditional ham radio users will also enjoy the S-units signal strength meter and the built in frequency manager.

SDR-RADIO.COM V2/V3 (Windows) (Free)

SDR-RADIO.COM V2
SDR-RADIO.COM V2

SDR-RADIO.COM V2 and the newer V3 is a popular SDR program with many advanced features. As such is it a fair amount more difficult to learn and use compared to SDR# and HDSDR. Be sure you install version 2 and not V1.5 as only V2 has RTL-SDR support.

Once sdr-radio is installed, to get it working with the RTL-SDR you will need to compile or download three .dll files (SDRSourceRTL2832U.dll, rtlsdr.dll and libusb-1.0.dll) and place them into the sdr-radio folder. To compile your own dlls see the instructions here, otherwise download the dlls directly from the bottom of this link. If the dlls were placed in the correct folder you will be able to add your RTL-SDR as a receiver by clicking on the +Definitions button, and then finding and adding the RTL SDR (USB) option under the search drop down menu.

Like HDSDR, not only does sdr-radio have a RF FFT signal and waterfall display, but also an optional audio spectrum FFT and waterfall display. Built in are also several DSP features like a noise blanker, noise reduction filter, notch filter and squelch options. The EMNS noise reduction filter is particularly good at automatically cleaning up and clarifying voice signals.

To add to the feature list, sdr-radio also has built in PSK, RTTY and RDS decoders, and also comes with a satellite tracker. Furthermore, sdr-radio V2 (not V3 yet) has an excellent remote server which will allow you to easily set up and connect to a remote RTL-SDR server over a network or the internet. Finally, sdr-radio is capable of listening to up to 6 signals in the same chunk of visible spectrum at a time.

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