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

Notes on the Red Pitaya Open Source Instrument

Custom firmware for Vaisala RS41 and Graw DFM-17 radiosondes with support for amateur radio use. Ideal for tracking high-altitude balloons. 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

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

A small hardware device for transmitting WSPR messages based on the SI5351 IC which uses GPS for transmission time synchronization and automatic QTH locator calculation.

FT8/FT4/WSPR Skimmer base on WSJT/KiwiSDR

Worldwide Network of WSPR Beacons

WSPR statistical analysis

UDARP - Universal Digital Radio Protocol

A C# based class library and usage examples related to interacting with WSJT-X through the UDP interface in .NET 7, 6, & .NET Framework 4.8

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.

Band hopping WSPR beacon for Arduino and Si5351

A QRP WSPR transmitter leveraging a Raspberry Pi

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

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

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