What car? Non SFD2 - OBDeleven is fine. SFD2 -next to 0 DIY changes possible

www.beepoff.app launches soon, extremely useful for SFD2 cars
Beepoff sounds interest. It goes into the bus one assumes. Hence it has to be professionally fitted with all the handshakes and involvement of the mothership 🛸👽👾... pushing the boards graphics ;) .