Re:I Hacked My Car Guides: Creating Custom Firmware
by TedDoesntTalk on Tuesday July 19, 2022 @10:13AM
(#32151755)
After-market head units don’t seem to have access to the same data as this factory-installed one. Can after market head units read gas tank levels, battery voltage, door lock statuses (and lock/unlock doors with commands), probably interface with the climate control system, too.
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Re:I Hacked My Car Guides: Creating Custom Firmware
by 95014_refugee on Tuesday July 19, 2022 @12:58PM
(#32154644)
The challenge with doing this with an aftermarket headunit is that you need to cover a meaningful number of different vehicles in order for the feature to be useful to your customer base.
With that said, yes, if you happen to have a suitably common vehicle (e.g. Ford F150).
Re:I Hacked My Car Guides: Creating Custom Firmware
by Nextgrid on Tuesday July 19, 2022 @04:16PM
(#32157359)
Nothing prevents them from having access - it’s just a matter of reverse-engineering the messages transiting on the various CAN buses the radio has access to.
Zenec for example makes units that are able to display & control HVAC and parking radar on VAG Group (Volkswagen/Audi/Seat/Skoda) vehicles, pulling the data from the CAN bus.
In the authors case he’s reusing existing manufacturer-provided libraries that handle CAN message parsing but there’s no reason you couldn’t do it from scratch with enough effort.