During my time doing accelerated modules at NUS, one of our projects was to build a CubeSat which is capable of live-streaming telemetry information from a weather balloon.

I couldn't resist the opportunity to over-engineer (the living hell) out of that project, and so I built a STM32 powered CubeSat called ARMSat. Because... it's powered by an ARM processor. Here's more info :)

https://engineers.sg/video/tm32-based-nanosatellite-project-hackware-v3-14159--1773