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.

Versatile, feature-rich and user-friendly custom firmware for ALL revisions of Vaisala RS41 radiosondes

Arduino sketch for a High Altitude Balloon tracker for ESP32 and sx127x, sx126x, RF69, LLCC68 or RFM9x. Supports LoRa, LoRa-APRS and APRS, RTTY, Horus V1 4FSK, Horus V2 4FSK, Horus V3 4FSK and SSDV. Supports LoRa uplink.

4FSK HorusBinary V1 and V2 compatible HAB tracker for SX127x and Arduino Pro mini

GNU Radio out-of-tree (OOT) module for QRadioLink blocks.

Audio communication network html modem. Turn your sound card into a network adapter. Analog packet radio acoustic internet build for off-grid telecomunication. 4FSK+2FSK+SSTV PD290+gibberlink and revolutionary helscreiber video stream all in one html ready to deploy. (Encryption is optional)