Mikael NousiainenOct 15, 2023

RS41ng #hamradio firmware for @GrawRadiosondes DFM-17 #radiosonde s ready for testing! CW, APRS and Horus 4FSK modes supported. Thanks Mike KD2EAT for collaboration!

👉 https://github.com/mikaelnousiainen/RS41ng

The video below shows APRS decoding on a Kenwood TM-D710G and Direwolf software.

Because of the experimental nature of the firmware code, we recommend NOT using a DFM-17 as your primary flight tracker yet. Instead, please test it first as a secondary tracker.

#amateurradio #hab #dfm17 #graw

GitHub - mikaelnousiainen/RS41ng: 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.

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, mors...

GitHub
Mikael NousiainenSep 15, 2023

Figured it's finally time to activate this account (and not post to that other service only), so the best way to start is with some #amateurradio hacking:

This #Graw DFM-17 #radiosonde has learned some new tricks and it chirps CW (morse) and Horus 4FSK modulations on the 70cm ham radio band. This is a work-in-progress port of my #RS41ng radiosonde firmware, as the DFM hardware is very similar to #Vaisala #RS41.

Next up is #APRS + testing, so soon you'll be able to repurpose your #DFM17 sondes!