ReWheel | Can it be used to modify the max speed?

blkdout

@loaffette Jake Leary is saying VESC is there: https://www.youtube.com/watch?v=AWp4XteFnXo&t=1s

However, from my understanding, it's no walk in the park to setup and tune. I plan to VESC my XR once the internals fail but have a feeling I should start studying now lol.

outlandnish

@loaffette just saw this question, sorry for the delayed response! I'm the author of that rewheel project.

Currently, you can decrease the pushback + increase the Pint aggressiveness to give you higher speeds using those firmware patching tools. Past that, you could modify the Pint to higher current limits, but I haven't looked into doing that yet. As everyone else has mentioned, you run the risk of drawing too much current from the battery depending on the riding conditions (incline, rider weight, etc.).

The reason why the Pint X and the XR can draw more current (and have an even higher max speed) is because they have that second string of batteries run in parallel. Your safest bet would be to get an XR / Pint X until we find a way to dump firmware without pulling the chip off of board.

OneDanGTS

@outlandnish said in ReWheel | Can it be used to modify the max speed?:

until we find a way to dump firmware without pulling the chip off of board

I didn't follow that link, but that definitely sounds like something that is not for the faint of heart! :D

LOAFFETTE

@outlandnish couldn't you make a jig or some sort of "hat" that can latch onto the chip, or is it one that doesn't have the legs? If it has legs, you could just make something that latches onto the top of the chip and have contacts that touch onto the leads?

outlandnish

@loaffette I wish! The hack requires setting the BOOT1 pin high. And either by accident or forethought, Future Motion grounded that pin underneath the chip.

You have to physically disconnect it from that ground to load the firmware dumping exploit into SRAM. Sadly, we haven't found a way around that.

Now if the Bluetooth chip on the controller, the OTA mechanisms, or one of the other peripherals have access to the memory of the STM32, then we have a chance. But all of that kind of stuff is way above my head too.

I was only able to do this hack because there was a research paper documenting this exploit and someone had already tried it on the Onewheel.