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RTL-SDR (RTL2832U) and software defined radio news and projects. Also featuring Airspy, HackRF, FCD, SDRplay and more.
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      • Terrestrial
        • P25 P1 Digital Voice Decoding
        • P25 P2 Decoding with OP25
        • Trunked Radio Following
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        • Analyzing GSM Signals
        • DRM Radio Decoding
        • Decoding 433 MHz ISM Band Weather Stations
      • Single Board Computer
        • QRP (FT8, JT9, WSPR etc) Monitoring Station
        • Performing Replay Attacks with RTL-SDR and RpiTX
      • Radio Astronomy
        • Radio Astronomy Overview
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        • Measuring Filter Characteristics & VSWR
        • SpyServer Tutorial
        • Using the V3 Bias Tee on PiAware
        • Properly Positioning a Preamp/LNA
    • Product Reviews
      • SDRs
        • Airspy HF+ Review
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        • SDRplay RSP1A
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        • LimeSDR Review
        • LimeSDR Mini
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        • KiwiSDR Review
        • FlightAware Prostick vs Prostick Plus
        • HackRF PortaPack Review
      • SpyVerter Upconverter
      • 9A4QV Folded Monopole ADS-B Antenna
      • FlightAware ADS-B Antenna and Filter
      • Outernet LNA and Patch Antenna
      • moRFeus Review
    • Interesting
      • TEMPEST with SDR
      • Listening to HD Radio
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      • Listening to SCA Broadcasts
      • Live ADS-B Aircraft Cockpit
      • Transmitting with a Raspberry Pi
    • Quick Start Guides
      • RTL-SDR QSG
      • V3 Features Users Guide
      • SDRSharp Users Guide
      • PlutoSDR QSG
    • Direct Sampling Mod
    • Roundup of Software Defined Radios
    • KerberosSDR
      • KerberosSDR Quickstart Guide
      • Direction Finding Android Demo
      • Direction Finding Android Tutorial
      • SignalsEverywhere Direction Finding Tutorial
      • Networked Direction Finding
      • Measuring Traffic Volumes with Passive Radar
  • Software
    • RTL-SDR Supported Software
    • List of SDRSharp Plugins
    • Experimental Drivers
      • Experimental HF Driver
      • Manual gain controls and decimation driver
      • ExtIO with Decimation & Tuner Bandwidth Controls
      • Keenerds Driver
      • L-Band Heat Issue Driver
  • Signal ID Wiki
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Monthly Archives: December, 2025

  • DSDPlus Public Release Updated & Fast Lane Changes December 9, 2025
  • rtl_haos: An rtl_433 to Home Assistant Bridge December 2, 2025
  • Frugal Radio: Using a 25 Dollar PC for Decoding with SDRs December 1, 2025
    • Newer posts
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Recent Posts

  • Demod Analyzer: Analyze Digital Modulation (BPSK, QPSK, 16-QAM) in IQ Files
  • Marine VHF Scanner: A General Purpose Narrowband Receiver and Scanner for the RTL-SDR
  • LakeShark: P25 Phase 1, FM, POCSAG, ADS-B and Sub-GHz with an RTL-SDR on the LilyGO T-Display P4 (ESP32-P4)
  • Automating Indoor RF Heatmapping with a PlutoSDR, Raspberry Pi 5 and LiDAR SLAM
  • InjectEave: Eavesdropping on Headphones by Injecting a Carrier and Listening to the Modulated Retransmission

Recent Comments

  • Larry on Marine VHF Scanner: A General Purpose Narrowband Receiver and Scanner for the RTL-SDR: “Please send me the python source code. Thanks” Sep 25, 13:51
  • gvanem on FoxSDR: A From-Scratch Software-Defined Radio Receiver for Windows: “This project has now gone awl from Github. Project page at: https://github.com/wonderingStars/foxsdr.git is gone. What!?” Sep 25, 13:36
  • Jim on Marine VHF Scanner: A General Purpose Narrowband Receiver and Scanner for the RTL-SDR: “I would like the Python source code, please.” Sep 25, 00:39
  • Anonymous on RTL-SDR Blog V4L (Lite) Now Available for Purchase!: “I plug it into a Raspberry Pi 4 that only has USB-A.” Sep 24, 22:55
  • Hussein on About RTL-SDR: “I’m planning to use four RTL-SDR V4 receivers simultaneously for a multi-channel application such as beamforming. I have a couple…” Sep 24, 18:36
  • wesleycolton on KerberosSDR Preview: A 4x Coherent RTL-SDR for Direction Finding, Passive Radar and more: “Really interesting project, especially the fact that all four receivers are kept coherent while still using a single USB connection.…” Sep 24, 14:09
  • Fabio on Marine VHF Scanner: A General Purpose Narrowband Receiver and Scanner for the RTL-SDR: “A version of this program for aviation frequencies would be great!” Sep 22, 23:13

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What is RTL-SDR

The RTL-SDR is an ultra cheap software defined radio based on DVB-T TV tuners with RTL2832U chips. The RTL-SDR can be used as a wide band radio scanner. It may interest ham radio enthusiasts, hardware hackers, tinkerers and anyone interested in RF.
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