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

blkdout

@onedangt

So, if it were possible to patch the Pint X to bump the pushback to 18 mph (which I think it can handle as the Pint X seems to have as much, if not more, torque than my XR

This would be my impression too as the two boards seem to have the same power on tap but I still wouldn't risk it lol.

LOAFFETTE

@blkdout I've got an idea, but could it's probably just a pipe dream.

Could a bigger battery with a BMS that can supply more power be a solution? It's only an idea, and maybe the actual controller part probably has a limit on the amout of power it can provide.

NotSure

@onedangt first thing this needs is amenable hardware! as u said: no usb. frankly, im astonished there are no emulator boards out there yet!!!

S. Leon

@loaffette -- A bigger battery? Yes. Kind of. VESC often makes use of a higher voltage, and probably more capacity battery along with adjustable app parameters to achieve 30+ mph. Early model Onewheels, including some XRs, allow more battery to be paralleled in, or in the case of the V1 and Plus, to run without a BMS at all -- in my case I am using high capacity EGO batteries and no BMS.

Often I ride my Onewheel Plus at greater speeds than most people ride their XRs. A nosedive, though, is certainly still possible. I use a BadgerSense to visually tell me how much of the battery I am drawing at any given moment -- but I did nosedive at 25 mph when I was distracted by something else and was not watching the BadgerSense display.

Looking for speed can get you hurt, hospitalized, or disabled. Again, I personally seriously gear up with helmet, wrist guards, knee pads, hip pads, and a Fox mountain bike armored vest with an extra d3o pad for the shoulder and elbow. The vest undeniably saved me in this fall by allowing a long, smooth pavement slide on the hard plastic neck-to-tailbone back scallops.

In other falls I have broken a wrist, cracked ribs, shattered a collarbone, and suffered a concussion even through a full face motorcycle helmet. Luckily, none has disabled me -- and too, lucky that insurance paid most of the medical bills.

Onewheeling is great fun! ...Be safe! ...Take it easy! ...Enjoy the learning experience!

LOAFFETTE

@s-leon
Sorry for late response, college work got nuts
I did ahve some time to think and I was wondering if people have put a VESC in an XR or something. I've heard VESCS are getting closer and closer to acting/emulating the feel and the "Onewheel-ness" of a onewheel

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.