I would be surprised if Tesla backhauls their data over anything but a TLS connection (even if they only need GPRS connectivity). - thus making a middlebox useless.
Besides products sold to governments agencies, the only 2 options I know of to make a GSM middlebox are OpenBTS or the osmocom stack.
You'd probably have better luck getting at that data through onboard diagnostic ports or the like.
Besides products sold to governments agencies, the only 2 options I know of to make a GSM middlebox are OpenBTS or the osmocom stack.
You'd probably have better luck getting at that data through onboard diagnostic ports or the like.