Some Python scripts somebody wrote to do interesting things with an RTL-SDR. The only one that's vaguely documented is the spectrum analyzer.
Official documentation for the Kraken SDR.
A project that uses your browser's Web USB API, an RTL-SDR dongle and antenna, and some vanilla JS code to implement an ADSB tracker without a dedicated server. Doesn't use a web design framework so you can check it out and throw a web server (like http.server) on it, and there you go.
Many aircraft broadcast information about how accurate their navigation system, which is almost always GPS, is at any given moment. The GPSJam map aggregates that data over 24 hours in time bins it into a hexagonal map. Green hexagons show where more than 98% of all aircraft who flew through that area reported good navigation accuracy. Yellow hexagons show where between 2% and 10% of aircraft reported low navigation accuracy. Red hexagons show where more than 10% of aircraft reported low navigation accuracy.
Data is pulled from ADSB Exchange.
Metermon is a dockerized rtlamr wrapper that connects to an existing rtl_tcp instance and outputs formatted messages over MQTT for consumption by other software (e.g. telegraf for storage in influxdb and display in grafana, or import into Home Assistant).
The script can be run using docker (takes care of all dependencies) or standalone. It is designed to run on Raspberry Pi or similar.
By pulling apart this container it should be possible to figure out how to do this.
Github repository for the Kraken SDR.
This software is intended to demonstrate the direction of arrival (DoA) estimation capabilities of the KrakenSDR and other RTL-SDR based coherent receiver systems which use the compatible data acquisition system - HeIMDALL DAQ Firmware.
The complete application is broken down into two main modules in terms of implementation, into the DAQ Subsystem and to the DSP Subsystem. These two modules can operate together either remotely through Ethernet connection or locally on the same host using shared-memory.
Running these two subsystems on separate processing units can grant higher throughput and stability, while running on the same processing unit makes the entire system more compact.
There is a beta Raspbian image available for download that includes all of the necessary software.
Designed with the RasPi 4 specifically in mind.
Documentation for the Kraken SDR is in this repo's wiki.
Also, thankfully, has instructions for installing the software yourself so you're not reliant upon their builds.
Guide to aircraft tracking using ADS-B reception with SDR and docker containers. Published on GitBook.
Trunk Recorder is able to record the calls on trunked and conventional radio systems. It uses 1 or more Software Defined Radios (SDRs) to do this. The SDRs capture large swathes of RF and then use software to process what was received. GNURadio is used to do this processing because it provides lots of convenient RF blocks that can be pieced together to allow for complex RF processing. The libraries from the amazing OP25 project are used for a lot of the P25 functionality. Multiple radio systems can be recorded at the same time.
Trunk Recorder currently supports the following:
Turbine is the SDR software for NoraSector. It's designed to capture and stream all frequencies in a trunked radio system. It is capable of decoding multiple systems concurrently, even different system types, provided they all fall within the same sample bandwidth generated by the radio and there's enough CPU available.
It's built with the expectation that it uses a single SDR that is able to capture the bandwidth containing all frequencies in the system.
All audio is encoded using the Opus codec for compatibility with WebRTC and output over UDP.
Designed for big-bore SDRs, like the HackRF. You won't get an RTL-SDR working with this (even though I tagged it with that to make it easier to find).
Virgo is an easy-to-use open-source spectrometer and radiometer based on Python and GNU Radio (GR) that is conveniently applicable to any radio telescope working with a GR-supported software-defined radio (SDR). In addition to data acquisition, Virgo also carries out automated analysis of the recorded samples, producing an averaged spectrum, a calibrated spectrum, a dynamic spectrum (waterfall), a time series (power vs time) and a total power distribution plot.
Lastly, an important set of utilities is provided to observers, making the package for a great tool for planning (radio) observations, estimating the system sensitivity of an instrument, and many more.
Radio equipment dealer. Personal and business-related radio equipment for sale, new. Also, shortwave receivers, scanners, software-defined radios, radio accessories and stuff for kids.
I am a young systems engineer in Paris, recently graduated in embedded systems. Electronics and code being my passions, I enjoy working on innovative open-source/hardware projects.
Dual language site - english and french.
This non-interactive application allows automatic reporting of WSPR spots on WSPRnet. The idea is to allow the use of small computer like RaspberryPi or Beaglebone boards, with a simple daemon. This kind of very lightweight setup could run continuously without maintenance and help to increase the WSPR network. The code is massively based on Steven Franke (K9AN) implementation and Joe Taylor (K1JT) work. This code was originally written for AirSpy receiver.
rpi_rtlsdr_weather_station is Python code, based on https://dash.plotly.com to show weather data from a wireless weather station to a web page, served from a raspberry pi. Wireless data from the weather station is received with a RTL-SDR dongle and decoded by https://github.com/merbanan/rtl_433/.
The code is tested with a Fine Offset Electronics WH1080/WH3080 compatible Weather Station (Alecto WS-4000).
SuperSDR allows a realtime view of the spectrum waterfall and audio playback of any KiwiSDR around the world along with a local or remotely controlled CAT transceiver.
Requires pygame, pyaudio, matplotlib, numpy, and scipy.
References the KiwiSDR specifically. Maybe it'll work with others?
This small script is a cheap and easy way to start with IoT projects. By using the great rtl_433 software and a cheap RTL-SDR receiver it will listen to all kinds of devices transmitting at the 433,92 Mhz frequency.
Quite likely it will receive information from weather stations in your area, if you don't own one, your neighbours might! It will also receive signals from remote controls that are popular to use to control the lights.
The gateway will receive information from the SDR receiver and publish them in JSON format to the topic sensors/rtl_433. (Without the slash!)
Subtopics are created from this JSON line allowing to easily subscribe to specific sensors.
Requires the rtl_433 utility as its data source.
Spektrum is a spectrum analyzer software for use with rtl-sdr.
The biggest advantage is that it can do sweeps across a large frequency span.
User interface part is written in Processing.
A WebSDR is a Software-Defined Radio receiver connected to the internet, allowing many listeners to listen and tune it simultaneously. SDR technology makes it possible that all listeners tune independently, and thus listen to different signals; this is in contrast to the many classical receivers that are already available via the internet. WebSDR servers can register themselves automatically on this site, leading to the below list of currently active WebSDR servers.
Anyone can access any of the SDRs listed on this site and listen in.
RTL-SDR based spectrum analyzer.
RadioWitness is a P25 public safety radio archive with a web application and support for cryptographically authenticated mirrors through Dat Protocol. Running this software requires two or more RTLSDR radios and one or more local P25 "Phase 1" public safety radio networks.
It looks like reading through the documentation alone will help in building a trunk tracker.