Reversing engineering a 2.4GHz remote control @rgerganov
Radoslav Gerganov posts the methodology used to decode the GFSK radio signals from a toy car remote.
I have an old project on Github called rf-car for controlling a radio car with HackRF. A few months ago, my daughter received a new RC car made by Dickie Toys:
This car was faster than the previous one and it was more fun to play with. I thought it’d be great if I can add support for it in the rf-car project and the fun began.
The go-to tool for signal analysis is, of course, inspectrum. I have successfully reverse engineered the ASK/OOK signal of my old car with it but I didn’t have any experience with FSK signals.
There are 146 symbols (bits) in each packet. The packets in each batch are the same.
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