rs41

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.

Versatile, feature-rich firmware for ALL revisions of Vaisala RS41 radiosondes, supporting factory-calibrated sensors (silver boom and pressure board), excellent GPS performance, Horus/APRS/Morse/RTTY/Pip/Fox radio modes and more! Project usage is straightforward, with web flasher and guided configurator.

Reverse Engineering of the Vaisala RS41 Radiosondes Data Frame Format

RS41 and DFM09 radiosonde projects

dxlAPRS extension for uploading radiosonde telemetry to SondeHub

Radiosonde decoder, monitoring, scan and decoder status

ESP-IDF firmware that turns a LILYGO T3 V1.6 into a portable weather-balloon receiver — BLE companion to the BalloonHunter app.

dxlAPRS Encrypted Sonde Telegram Notifier

Handheld RS41 radiosonde recovery receiver firmware for the LilyGO T-Deck Plus with SX1262, GPS navigation, SD logging, frequency scanning, and read-only SondeHub predictions.

Linux-based RS41 radiosonde tracking, decoding and SondeHub upload application with graphical and terminal interfaces, as well as script-based launch options. / Linuxos RS41 rádiószonda-követő, dekódoló és SondeHub feltöltő alkalmazás grafikus és terminálos felülettel valamint script indítási lehetőségekkel.