GitHub repository: whallmann/RS41ng
Primary language: C
Description: 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, morse code (CW) and additional digital modes like WSPR and FT8 via Si5351.