Compatibility with Firmware 4.21.0

[hg8]

Hey 👋

First of all I know you don't own a C4, I am creating this issue to see if there is a possibility of collaboration with the community to debug and test fix for this problem.

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Firmware 4.21.0 ("AdaptivePower 2.0") included a lot of changes, for example it's the first time in 2 years that an update reverted my Untamed settings.

Once setting again "Torque (no speed limit) + Field weakening" in the app the bike mostly works fine and behaves as expected, expect that the engine completely shut off when starting from a stopped position (It kind of feels like engine protection or something ?). The bike is still on but the engine won't work at all until you re-lock and unlock the bike (doesn't even work every time).
When reverting to "Torque and speed limit" from the Untamed app, the problem fully disappears.

I tried various field weakening settings but none changed the issue. Any idea on how to debug this issue or what could be the cause ?

Thanks!

EDIT: Or alternatively, if anyone knows a way to revert to a previous firmware version ?

[Imaginous]

It feeds my "fears", I believe they are controlling the motor controller more directly via the main PCB.

I assume they adjust the torque sensor dynamically.
I don't quite get it why only setting torque without speedlimit dusturbs the power output. Field weakening can do this.
It's also possible the changed register addresses, so we are changing wrong addresses.

[ezly123]

I'd like to report I have the exact same issue, C4 with AP 2.0 and Untamed.

[BrianMnairB]

Yeah, same 'issue' here. I tried to go back to default settings and only unlock the speed limit. So without field weakening, just to see if I'll run into the issue again and also to see if the field weakening is correctly reverted back to default (0).

[hg8]

I assume they adjust the torque sensor dynamically.

Indeed, seems like it and it would explain why it sometimes works sometimes doesn't.

It's also possible the changed register addresses, so we are changing wrong addresses.

Could we use expert mode to read address values since the latest update? Would that help make sense of what is happening ?

[BrianMnairB]

The version is v4.21 btw, not v4.12

[Imaginous]

I assume they adjust the torque sensor dynamically.

Indeed, seems like it and it would explain why it sometimes works sometimes doesn't.

It's also possible the changed register addresses, so we are changing wrong addresses.

Could we use expert mode to read address values since the latest update? Would that help make sense of what is happening ?

You can read every address, only it is going to be trail and error.
Also there is no easy tool to compare all changes at once.
At this moment I also have some health issues which prevent me from investing a lot of time/work into this project.

Also the NDA is still in effect, so I can't share the source without any legal issues.

[hg8]

Ah, I am sorry to hear that.
It's all good, take all the time you need and take care of yourself first 👍 It's already amazing all the work you've put in for the cowboy community. Thanks a lot for that.

[Cryptosaurus89]

Hope you'll be well soon!

I have the same issues with 4.21 version. Is it possible to downgrade?

[maakle]

I also share the same problem. I have a C4 Classic on Firmware v4.21.0. But I am unable to perform the second update 2/2 for the engine. It always stops with an error message during the update.

What I tried now was to use the Untamed App to reset to default settings. This somewhat works, it threw sometimes an error as seen on the images below but in the end worked that the bike has now again the speed lock and is back to how it was before.

fieldweakening: Operation failed: 010300810001D422
motormode: Operation failed: 0103000B0001F5C8

Nevertheless I am still unable to perform the second update for Adaptive Power 2.0. Which leaves me now basically with a broken bike on Firmware v4.21.0 where the engine shuts off from time to time during the ride...

Any other ideas how to I fix this?
Is there another way that I can reset the engine to factory settings? And then at least perform the Adaptive Power 2.0 2/2 update? Or did Cowboy somehow block this now
Is there a way of going back to Firmware v4.19.0 where everything was working?

[Imaginous]

When you connect and field weakening is empty and torque and speed limit is selected. Everything is default.

Unless you used the expert settings and or presets and stored these in firmware.

[maakle]

I double checked with the iOS App from the Unleashed project that everything is fully reset and back to defaults.

But still no luck in updating to Adaptive Power 2.0. It'll show me the error screen attached. Sorry for the German but it basically says "The update failed, please try again later."

Which leaves us right now with 2 options:

1. Cowboy can someone fix this and allow upgrading to the second update -> I booked an appointment with one of their mechanics. Maybe they can perform some black magic
2. @Imaginous can find a way of making Untamed work with v4.21.0 is there any further way we can help or assist you?

Or is anyone else able to perform both updates? On Reddit some people claimed that.

[hg8]

Or is anyone else able to perform both updates? On Reddit some people claimed that.

I was able to perform both updates without issues, while untamed settings applied.

May be silly but have you tried to uninstall and reinstall the cowboy app? I had update issues in the past and reinstalling the app and relink the bike always worked.

Maybe try to install the cowboy app on a different phone as well? I think your update issue is not linked to Untamed.

[maakle]

So I tried what you suggested @hg8 this morning. (I deleted and installed the Cowboy App again, removed the bike and connected it again etc.) It was unfortunately not successful and the second update still doesn't finish. I'll try to see if Cowboy can fix this and help me to finish the second update. But this seems unrelated to Untamed for sure. There is a Cowboy store very close by work location, maybe I can ask them there.

That being said, my bike is now technically back in default settings with speed limit and no field weakening and it still turned off this morning 1x during my morning commute. So perhaps Firmware v4.21.0 introduced something that is causing this. No matter if Untamed is being used or default settings from Cowboy.

Btw I also experienced the exact same thing like you @hg8 that when I arrived at work, the bike briefly completely shut of and turned back on then again. That being said, my bike is now on default settings and this still happened.

[Imaginous]

I know multiple occasions that the update successfully completed. With and without Untamed.

I also heard that non Untamed riders sometimes have shutdowns with AP2.0 when starting uphill.

So it seems the over current margin is too tight in AP2.0.

@maakle you can try to enable a preset in which you lower the power output for the lowest speed group to 50% or maybe even lower.

And torque without speed limit and the desired field weakening.

Don't store anything in flash, but just use the preset and make some test drives.

Lowering the power might prevent the overcurrent when starting from a standstill.