I find comma.ai’s work pretty fascinating compared to the bigger fish in the self-driving world. There’s something quite human about it versus the Waymo’s and Tesla’s of the world.
Huh intersting that that they don't support any of the european Stellantis brands at all, wonder what they do differently that makes them incompatible.
I’m working on integrating with a Jeep Renegade which was designed on the Fiat small-wide platform, and the CAN bus architecture is a non-starter for mainline OpenPilot support. OpenPilot requires every signal needed from/to the car is accessible by tapping at most two CAN buses, both of which must be accessible on the cable to the lane assist camera behind the rear view mirror.
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 wonder if it's possible to do link aggregation for x8 lanes to GPU. I have two thunderbolt connections available, each x4. x8 has minimal losses for gaming.
Two things: 1. they have a cheap fuse (cents on the dollar) that’s not automotive-grade so your windshield mounted device fails in hot weather and doesn’t last past the hardware warranty. Known issue, doubt they ever fixed it.
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.
You're not paying $1,000 for a cut down Android when you buy a Comma Four.
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 $200 every month for a mandatory subscription.
Which one makes you feel better? Comma as a business needs to be able to pay their employees.
I want them to improve the product meaningfully beyond lane keeping, which besides lane changing (partially), it's the only thing it's capable of because they willingly choose not to extend the system to use more visibility.
comma 4 was built from the ground up to avoid this problem. also they are building it in the us for about 500$ the 1000$ price tag isnt super unreasonable.
the picture of that GPU installed on the side of the firewall tunnel reminded myself and my husband of a gadget they would have shown off in the original Batman series.
"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?"
I had my C3X audio device fail a month or so past warranty. It literally couldn't detect the sound card anymore. My car is not supported, and I've been on a fork since the beginning. Few line of code changes to get it working again and it's almost two years in use. And yes, I tried flashing any and all available releases/forks. The sound hardware was not visible in the kernel on all.
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.
This bridge - does it actually support host PCIe->thunderbolt->PCIe device - my reading of it is that it's just handling USB commands that the bridge is turning into separate PCIe commands to the GPU?
My understanding is both USB 4 and TB use PCIe tunneling. Surely at this price point we’re looking at a USB 4 device. Thunderbolt has historically cost more due to licensing, which is now free I believe, but there’s still specialized hardware and requirements manufacturers need to adhere to.
I'm surprised that it's pretty much the same as the adapters you can get on aliexpress. Not even a case to protect it from feet in the passenger footwell. Especially compared to the windshield-mount unit, which looks like a very slick product. I suppose they can always improve it if there is interest in this first version.
What I tried was based on theory (I haven't seen real device),
bought Oculink dock, connected Oculink to M.2 connector, USB4 M.2 SSD Enclosure to connect to thunderbolt, whole thing costed 150euros :)
25 comments
[ 0.25 ms ] story [ 17.9 ms ] threadOn 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
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.
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.
"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?"
https://blog.comma.ai/img/chestnut/install_footwell.png
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...