[Not firmware-centric, though some firmware (UEFI, for example) use support multiple wireless network protocols).]
Evil Crow RF is a radiofrequency hacking device for pentest and Red Team operations[…]
https://github.com/joelsernamoreno/EvilCrowRF-Beta
See-also: Rolljam:
https://samy.pl/defcon2015/
https://www.wired.com/2015/08/hackers-tiny-device-unlocks-cars-opens-garages/