My day-two review of the Comma 3X Self Driving Camera for Gen1 R1- Promising, but not ready for laymen.

[DayTripping]

I have about 800 miles on the comma and the one thing I wish it did differently was lift off the gas to slow down rather than apply the brakes to slow down. I hadn't used my brake pads at all until I got the comma.

It doesn't use the brakes any more or different than the stock ACC or HA. All the Comma does is command an acceleration or deceleration value. And if you've ever used ACC or HA, then you have also absolutely used the brakes.

This is why I used MADS a lot. When using MADS, I can use regen instead.

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[ScoobieSteve]

I got my add-on from Lukas for the auxiliary port for the Comma 3, and completed the install with a USB-C cable. The initial results were that the unit was indicating that the cable was faulty. I reinstalled and removed the magnet connector which did not help. Finally , a hard reset got me going. I am noticing the same issue as some that have written. When I set the speed and use MADS, no problems. When I set cruise control (for example, 40 in a 30), the unit will reduce my speed to as low as 22 mph. Any suggestions? Also, others have mentioned that they can accelerate above the set speed and it will hold. Mine will not. As soon as I release the accelerator, it goes back to set speed rather than my accelerated speed. Is this a setting of sorts? One final question, others have mentioned the ability to choose personality types for driving (aggressive, chill, etc...)> those options are greyed out for me. Is this also a setting that i have missed?

 

[JM.]

Currenly, my truck has errored out all sensors. I removed the second harness, and rebooted twice in two days, but nothing works including native Rivian adaptive or any sensors. The Comma is not installed. My next step probably is to remove the original harness too and reset. Ugh.

 

[ScoobieSteve]

Currenly, my truck has errored out all sensors. I removed the second harness, and rebooted twice in two days, but nothing works including native Rivian adaptive or any sensors. The Comma is not installed. My next step probably is to remove the original harness too and reset. Ugh.

Strange! Sorry to hear of these struggles. I wonder if removing all software from the Comma 3, hard reset....then reinstalling and hard reset may help?

 

[JM.]

I have completely disconnected the Comma and the second harness, THEN did two full resets. The Comma is no longer involved though the primary harness is still connected. So the only thing left to do that I can think of is remove that too.

Before this happened, I had done a factory reset of the Comma to install the button version, and the problem started when I connected the second harness to use the buttons.

 

[MrMusAddict]

I have completely disconnected the Comma and the second harness, THEN did two full resets. The Comma is no longer involved though the primary harness is still connected. So the only thing left to do that I can think of is remove that too.

Before this happened, I had done a factory reset of the Comma to install the button version, and the problem started when I connected the second harness to use the buttons.

It sounds like maybe your High Voltage system needs to be reset. This sounds similar to what's descrbed in the "Install in Sleep Mode" section of the Tips and Tricks doc pinned in the discord.

There have been a small number of installations where Driver+ was deactivated and unrecoverable after connecting the Comma harness. You will also not have power to the Comma 3X. A hazard reset (holding down the leftmost steering wheel button and the hazard button simultaneously) will not revive Driver+. This can only be resolved by performing a high-voltage battery reset (pulling the fireman’s loop and disconnecting the negative battery terminal located behind the frunk storage area).

 

[JM.]

I don't have the second symptom of no power to the Comma. I still have power to it. I've seen the Discord discussion and discussed it there. The problem I'm facing is unique it appears.

 

[MrMusAddict]

I don't have the second symptom of no power to the Comma. I still have power to it. I've seen the Discord discussion and discussed it there. The problem I'm facing is unique it appears.

Maybe, but it also may be unique while resolvable with a HV reset. It may be only a partial failure of sorts.

As far as I know, the harness doesn't change any of the signaling. It's just a passthrough from the original cable when he 3X is disconnected. I know for me, getting the harness plugged in was the biggest pain of the install, so if it were me I'd probably do these steps in order:

1. HV Reset (one trim piece and 2 bolts, disconnect 12v negative terminal). If that doesn't work, then:
2. Plug the original cable back into the AXM (one trim piece and 2 bolts, fight with cabling while you contort your body for 20 min). If that doesn't work, then:
3. Contact Rivian

 

[JM.]

As far as I know, the harness doesn't change any of the signaling. It's just a passthrough from the original cable when he 3X is disconnected.

This is what Lukas has told me. But the same is true for the secondary harness, and that DEFINITELY caused problems when plugged in, without the Comma at all. So it's a mystery. My sequence of events...

Working Comma system with a single harness.

Add second harness, Lukas' provided USB cable, and start up car.

No Comma power. Reverse USB cable, now Comma powers up, but with sensor errors.

Remove Comma, still errors.

John Travolta reboot, without secondary harness or Comma, no errors.

Connect the Comma only, not secondary harness. Now the Comma complains because the secondary isn't connected to the Panda. Now my adaptive is disabled, other sensors ok.

Connect secondary harness ONLY, no USB cable, all sensor error out.

Reset. Errors.

A day later, reset again, still errors.


Agreed on the pain in the ass to remove the harness, you may be right. Also, yesterday I had cataract surgery and have lost most of my near vision for a week or two. I can't imagine how I'd see the AXM.

 

[JM.]

This is all in between trying to live life and commute as needed. Lack of cruise isn't the end of the world, except I have a damaged right knee and having to hold the pedal in position is painful and potentially further damaging. So there's a balance to be found here between hackery and being able to just do things normally. Our secondary car is tiny and limited, and I have been told to stay off the motorcycles for now (due to the surgery).

 

[silkyjohnson]

After a couple days, MADS is the way

 

[JM.]

After a couple days, MADS is the way

Adaptive cruise is vastly more important to me than steering. 80% of my annoyance/challenge is solved by that. Having MADS available for occasional challenges is good, but I consider it a crutch for the fact that we don't have proper speed control. I hope it becomes irrelevant soon.

 

[silkyjohnson]

Adaptive cruise is vastly more important to me than steering. 80% of my annoyance/challenge is solved by that. Having MADS available for occasional challenges is good, but I consider it a crutch for the fact that we don't have proper speed control. I hope it becomes irrelevant soon.

I may change my mind if I ever invest in the other adapter. Rivian's ACC drives me crazy

 

[gerrylum]

I got my add-on from Lukas for the auxiliary port for the Comma 3, and completed the install with a USB-C cable. The initial results were that the unit was indicating that the cable was faulty. I reinstalled and removed the magnet connector which did not help. Finally , a hard reset got me going. I am noticing the same issue as some that have written. When I set the speed and use MADS, no problems. When I set cruise control (for example, 40 in a 30), the unit will reduce my speed to as low as 22 mph. Any suggestions? Also, others have mentioned that they can accelerate above the set speed and it will hold. Mine will not. As soon as I release the accelerator, it goes back to set speed rather than my accelerated speed. Is this a setting of sorts? One final question, others have mentioned the ability to choose personality types for driving (aggressive, chill, etc...)> those options are greyed out for me. Is this also a setting that i have missed?

It would help if you could also let us know which branch you're on to help us diagnose. It almost sounds like you're using experimental mode. You can also check to see if you have speed limit sign detection on.

 

[ScoobieSteve]

It would help if you could also let us know which branch you're on to help us diagnose. It almost sounds like you're using experimental mode. You can also check to see if you have speed limit sign detection on.

Thanks Gerry! I installed: xnor-tech/sunny-mads-buttons. Experimental mode is greyed out, I am unable to select a driving personality. I will check to see if sign detection is on as I did not see the option. I appreciate the help!

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