alexandrerouma/sdrplusplus

★ 5,920C++Audience · generalComplexity · 3/5Setup · moderate

Mindmap

mindmap
  root((SDR++))
    What it does
      Receives radio signals
      Displays frequencies
      Decodes audio
    Tech stack
      C++
      SoapySDR
      Plugin system
    Use cases
      FM radio listening
      Satellite reception
      Custom decoders
    Audience
      Radio hobbyists
      SDR enthusiasts
      Plugin developers

mindmap root((SDR++)) What it does Receives radio signals Displays frequencies Decodes audio Tech stack C++ SoapySDR Plugin system Use cases FM radio listening Satellite reception Custom decoders Audience Radio hobbyists SDR enthusiasts Plugin developers

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Things people build with this

USE CASE 1

Tune to FM radio stations or weather satellite frequencies on a Windows or Linux laptop using a cheap RTL-SDR USB dongle

USE CASE 2

Monitor multiple frequency ranges at the same time using separate VFO windows from a single SDR device

USE CASE 3

Write a custom SDR++ plugin module to add support for new radio hardware or a new signal decoder without changing the core app

Tech stack

C++SoapySDR

Getting it running

Difficulty · moderate Time to first run · 30min

Requires compatible SDR hardware such as an RTL-SDR dongle and the appropriate SoapySDR driver for that device.

No specific license is mentioned in the description.

In plain English

SDR++ is a desktop application for receiving and analyzing radio signals using software-defined radio (SDR) hardware. A software-defined radio is a small USB dongle or other device that plugs into a computer and picks up radio frequencies, while the computer handles all the processing that traditional radios do with physical circuits. SDR++ is the software side of that setup: it displays incoming signals, lets you tune to different frequencies, and decodes audio from broadcasts or transmissions. The software runs on Windows, Linux, macOS, and BSD. It is designed to stay lightweight and simple, avoiding feature bloat that slows down the interface. It supports a wide range of SDR hardware through a compatibility layer called SoapySDR, as well as dedicated built-in modules for specific devices. Multiple VFO (virtual tuner) windows can be open simultaneously, letting you monitor several frequency ranges at once from the same hardware. SDR++ uses a modular plugin system. Each feature (radio decoder, signal recorder, hardware source, audio output) is a separate module loaded at startup. This makes it straightforward to add support for new hardware or new signal types without changing the core application. The signal processing uses SIMD instructions (special CPU operations) to speed up the math involved in analyzing radio data. Pre-built installers are available for Windows and Debian-based Linux systems. Nightly builds with the latest changes are hosted on the project website. Users who want to add hardware support or new decoders can write their own modules by following the plugin API. A Patreon and a Discord community are linked in the README for users who want to support the project or get help with setup.

Copy-paste prompts

Prompt 1

How do I set up SDR++ on Windows with an RTL-SDR dongle to listen to FM radio stations?

Prompt 2

Show me how to write a basic SDR++ plugin module that adds a new hardware source to the application

Prompt 3

How do I configure SDR++ to receive NOAA weather satellite signals and set the correct sample rate and frequency?

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