STM32 Development Boards (literally) Falling From The Sky

C1 | Fri 25 Jan | 2:25 p.m.–3:10 p.m.

Presented by

  • Mark Jessop

    Mark is an Electronic Engineer currently working for a large defence contractor. In his spare time, he is an avid amateur radio operator with the callsign VK5QI, and regularly drives around the country hunting STM32 development boards that fall from the sky (also known at radiosondes). Mark has presented at in 2012 talking about High-Altitude Ballooning, and has presented at OpenRadio Miniconfs over subsequent years.

  • Michael Wheeler

    Michael has always been a tinker, both with software and hardware. Growing up hacking up programs with QBasic on a 286 to reverse engineering IoT hardware today Michael is always willing to take on new and exciting challenges in Technology.


Radiosondes are scientific instruments carried aloft under weather balloons to measure characteristics of the upper atmosphere. Thousands of these devices are launched around the world on a daily basis, and are generally left to litter the countryside wherever they land. Using a low cost software-defined radio, a Raspberry Pi, and all open-source software, it is possible to decode signals from these devices. You can then track their flight path, collect the weather data they transmit, and even recover and repurpose them! This talk will cover the development and worldwide use of the radiosonde_auto_rx project, and how we have been re-purposing Vaisala RS41 radiosondes for use on our own high-altitude balloon flights.