bluejay

And a lot of it is all open source! ESC software: - https://github.com/am32-firmware - https://github.com/mathiasvr/bluejay Flight controller (you mentioned these): - https://github.com/betaflight - https://github.com/ArduPilot - https://github.com/iNavFlight Control link: - https://github.com/ExpressLRS (also uses ESP32/ESP82 chips) Radio Controllers: - https://github.com/EdgeTX 5+ years ago the vast majority of this stuff was proprietary-only and getting into the hobby cost thousands of dollars. Now you could start at ~$500 (big price factor for FPV is the goggles, but cheap analog ones can be had for ~$100).