wspr

Open source, multi-user SDR receiver software with a web interface

Notes on the Red Pitaya Open Source Instrument

Easy-to-use custom firmware for Vaisala RS41 and Graw DFM-17 radiosondes with support for amateur radio use. Ideal for tracking high-altitude balloons. Configure and flash the firmware using a web browser (WebUSB). Supported modes include APRS, Horus 4FSK mode, CATS, morse code (CW) and additional digital modes like WSPR and FT8 via Si5351.

WSPR daemon for RTL receivers

A compact hardware device for transmitting WSPR messages based on the SI5351 clock generator, using GPS for transmission timing synchronization and automatic QTH locator calculation.

JT65/JT9/JT4/WSPR/FSQ Encoder Library for Arduino

FT8/FT4/WSPR Skimmer base on WSJT/KiwiSDR

Worldwide Network of WSPR Beacons

A QRP WSPR (and QRSS) transmitter leveraging a Raspberry Pi, with Si5351 support

A C# based class library and usage examples related to interacting with WSJT-X through the UDP interface in .NET & .NET Framework 4.8

WSPR statistical analysis

UDARP - Universal Digital Radio Protocol

Band hopping WSPR beacon for Arduino and Si5351

Si5351 based WSPR beacon

Multimode MEPT based on OpenBeacon

Minimal set of files required to build the WSPR decoder by Joe Taylor, K1JT and Steve Franke, K9AN.

Low Frequency and Weak Signal Underwater Communications in GNU Radio.

.NET Standard library for encoding/decoding messages using the WSPR protocol

RedPitaya application: Software Defined Radio (SDR) for an 8-channel WSPR receiver.

High Altitude Balloon tracker for Arduino and Si5351, using WSPR protocol and Morse code.