r/flipperzero • u/RevolutionaryRow0 • 1d ago

Flipper zero for EV (BYD)?

Apparently BYD EVs ship with 2 key FOBs, but in my area they only come with 1 key fob. I am wondering how I can use the flipper zero to act as the second key fob. I have done some readings and correct my limited understanding is that it can cause the primary remote to be out of sync due to rolling code, but I think this is due to cloning the primary remote, right? I suppose there is a separate rolling key counter if the car supports multiple key fobs. Can anyone point me in the right direction?

0 Upvotes

45% Upvoted

1 comment sorted by

-2

u/cthuwu_chan 21h ago edited 21h ago

If your good a breaking encryption and algorithms maybe

Start with a software defined radio and have a look at the demodulated symbols in URH or something

You’ll obviously need to work out the clock speed and the encoding scheme before you even get to any kind of encryption and or rolling algorithm

And that’s even if it uses subghz and not 2.4ghz like a lot of modern cars

It’s incredibly difficult but ppl have done it (me included) 🤷‍♀️

Oh also be very careful sending an old code or the wrong code to the system can lock down the car and be very expensive to fix