[Marcel] reverse-engineered this remote ... and built a test setup with a spare Arduino and CC1101 module. It worked, and he set out to design a separate dongle, using an ATMega32U4.

[Alexandre Blin] wanted a reversing camera for his old Peugeot 207 and went down a rabbit hole which led him to do some extreme CAN bus reverse-engineering ... BLE module connected to the Arduino ...