Chestnut – eGPU dock with open-source firmware
hwbusters.com
hwbusters.com
The RX 9060 has a TDP of 160W, but that’s the high end of what you can continuously draw from the 12v DC plug in a car, so it looks like they cap it at 100W. It has to be on the floor or under the passenger seat because it has to plug into that 12v outlet that’s usually in the front.
Things will get caught by the fan blades, and passengers will inadvertently kick it. Hopefully suddenly losing connection to the GPU won’t cause the car to hit a pedestrian or anything like that.
More generally, Comma's safety is handled by a microcontroller. The microcontroller limits steering torque commanded to a safe range for level 2 driver assistance and acts as a watchdog for the rest of the stack. Failure of openpilot causes it to disengage and sound an audible alarm.
"Golly gee whilikers Batman, what is this high tech contraption?"
"It's a car tracker my good lad, see how sleek and easy to hide it is?"
Want to run Qwen3.8 27B? Download the quantized model from HF, git clone tinygrad, then run `DEV=METAL python3 -m tinygrad.llm --max_context 8192 -m <GGUF File>`. Read the code and experiment - takes 1 minute.
Compare that with PyTorch (great, but almost impossible to comprehend and modify, IMO) or Mojo/MAX (complex and not even fully open source, not to mention that the Modular folks aren’t particularly nice). Tinygrad is a breath of fresh air.
i ran 7MW and 20,000 gpus in containers in WA for mining eth for many years. it is a bad idea that he's trying to do. but george is george and the hype is real...
sorry, no writeup other than what i've posted already.
I've given up on the latest models and don't bother with the automatic cruise control. But just the lane centering is extremely helpful.
When people ask me about the device, I tell then it's the next version of power steering. And if one has never driven a car without power steering, one may not understand how much easier it makes the drive.
Thought about upgrading to the C4 as the original owner I could trade mine in for a discount. But the first thing I noticed on reddit threads were the C4 H/W failures, and that made me not want to bother figuring out what's needed to get the C4 running on my car. Wish they figured out how to bulletproof the device, would love to add the GPU.
[1] https://github.com/tinygrad/asm2464pd-firmware/blob/master/U...
I can rest assured that when I use this on any machine running Mac, Windows or Linux, I know it just works well with tinygrad.
On the Renegade, the adaptive cruise control activation and control signals are on a separate bus from the steering control signals, and the ACC signals don’t get up to the lane assist camera at all. OpenPilot support on this vehicle will require tapping CAN buses in two spots on the vehicle, and this is not a Comma-supported configuration. They want to be able to make a single interposer cable that plugs in between the lane assist camera and your car, and if that’s not possible they will never support your vehicle.
To attempt to support my car I am working on a gateway device that will bridge information from the powertrain bus to the fusion bus so it will be available at the camera (which is on the fusion bus and the chassis bus). But this implementation, which may not actually work but even if it does, will never be accepted upstream. And safety-wise, that’s probably the right choice for the project.
The sad part is I think the only signal that I need that I don’t have at the camera right now to make a safe implementation is ACC engagement. I’ve scrutinized every bit of every message on the chassis and fusion buses available at the camera and there is simply no signal that indicates if ACC is engaged.
One bit is all I need to get lateral control working. Well, assuming that once I start injecting control signals there aren’t other issues, that is. And that is not probably a safe assumption.
I really think to buy my next car which is supported by comma
comma openpilot do its thing by faking stock self driving unit talking to actuators over the in-vehicle network; a modern car is like a bunch of Pi on a LAN hosting microservices, but on a car specific network standard, usually the one called CAN bus, instead of the 802.3 we're familiar with. The manufacturer stock units is usually a camera unit integrated CPU sitting behind a hump behind the rearview mirror. comma devices tap into the cable going in there, sending out fake commands to other computers handling cruise control, brake, steering, blinker... etc.
This can break two ways: some communication standards like FlexRay are harder to tamper and fake, or some newer cars have tightened security clearly in response to comma doing its thing too well, many following the new EU cybersecurity standards which require commands to be signed and/or each of those Pi-like modules to be crypto paired against each others.
I think Stellantis car always had the first of those two issues of having something difficult that are not strictly anti-hacker hostile architecture. But could be both or I could be wrong altogether. The comma devteam seem to like 2015-2019ish hybrids from such brands as Honda, Subaru, Hyundai and Toyota for the presence of the remote control features in the actuator modules && lack of security getting in the way.
See for example: https://autel.us/security-gateways/, 'Automakers with security gateways installed include Stellantis (Dodge, Chrysler, Ram, Alfa Romeo, FIAT, and Maserati), Nissan and Infinity, Mercedes-Benz, and Volkswagen and Audi.'
But i know there is some experimental work out there.
2. 1B parameter model to stay between two lines. Why. Waste of time. Their product hasn’t actually changed in several years because they will never advance past lane keeping SAE Level 2.
I suspect for what they’re selling for $1,000+ these days, could you find a way to do for half? Less than that?
I mean after all, it still runs off a Snapdragon 845.
Nice tech, disappointing limitations and too expensive. The world moved on, Tesla is bad but a Waymo competitor would be more serious than this.
What you're buying is an entry ticket to Comma-land — where dozens of car models are supported, pre-made harnesses are just a buy button away, and everything is open source.
If George had chosen to go the closed source route, you might be paying $200 for a locked-down device and $200 every month for a mandatory subscription.
Which one makes you feel better? Comma as a business needs to be able to pay their employees.
Comma on, man.
Maybe... you're answering your own question there?
> I suspect for what they’re selling for $1,000+ these days, could you find a way to do for half? Less than that?
Genuine question: does anyone else anywhere sell something like this? An all-in-one retrofitable level 2 self-driving gadget?