250w bafang kit locked down?

[ampuk]

HI,

New member, I built my own BBS02 750w with a 48 v battery, and programmed with the Speeed App and smoother settings found online, no problems.

A friend has just bought a trike in the UK with a supposedly "250w" motor, 48v battery but the amps seem to be limited to 12, can't increase them.

Also the re programming of the thumb throttle with the speeed app didn't seem to work.

Anyone know if some motors are locked down in the firmware?

Screen shot of settings attached.

Speed app would not let me increase amps over 12.

Thanks,

Bruce.

 

[cyclebuddy]

...with a supposedly "250w" motor...

With a supposedly what motor exactly. Some say the BBS02 is now an M315 and a HD an M615... except the BBS uses UART to communicate and the M series use CANbus. I don't know for sure, but I don't think the Speeed or PC app works with the newer M/CANbus versions.

 

[guerney]

Speed app would not let me increase amps over 12.

@peter.c reported the same:

https://www.pedelecs.co.uk/forum/threads/bbs01et-vs-dwg22c-for-cargo-bike.44591/#post-669438


Does the programming cable you're using read and write to your own BBS02? If so, that would of course exclude OTP cable and programming cable problems. In my experience, programming cables don't last long.

https://www.pedelecs.co.uk/forum/threads/bafang-programming-cables-seem-short-lived.45724/

Some say the BBS02 is now an M315

Is that the BBS02B?

"Bafang BBS02B motor bafang 48V750W mid drive kit Bafang M315 conversion kit"

Bafang BBS02B motor bafang 48V750W mid drive kit Bafang M315 conversio

Turn your bike into an e-bike - with Bafang motors In addition to the normal commercial e-bikes, there are lots of conversion systems available. "Bafang" is one of the leading manufacturers in this area - both for e-components and complete systems. Functional principle and advantages of Bafang...

eunorau-ebike.com

 

[ampuk]

Cable still works fine, reads and writes no problem, from the Speeed app

Just cant change amps, and thumb thrittle also seems unresponsive.

From the firmware and other info in the screenshot, can people tell if it's really a 250w, or a 500w or something else?

Cheers.

 

[guerney]

From the firmware and other info in the screenshot, can people tell if it's really a 250w, or a 500w or something else?

Cue Googling - perhaps 250W?

"manufacturer=SZBF
model=SW09
hardwareVersion=2.0
firmwareVersion=1.0.0.4
nominalVoltge=48 "

Sorpresa desagradable motor Bafang

Hola a todos Después de una larga espera, al fin me llegó el motor Bafang 250W 48V que pedí. Me ha costado bastante montarlo, no soy para nada manitas y menos para estos temas. Con todo montado y funcionando he salido a probar y ... bueno, me esperaba más (la verdad) pero lo achaqué a la...

www.mtberos.com

translation:

https://www-mtberos-com.translate.goog/tema/sorpresa-desagradable-motor-bafang.20796/?_x_tr_sl=auto&_x_tr_tl=en&_x_tr_hl=en-US&_x_tr_pto=wapp

 

[guerney]

Cable still works fine, reads and writes no problem, from the Speeed app

You could try other configurators, there's also a new browser based one which I have never tried and am wary of, because it's new and could brick the controller. USE AT YOUR OWN RISK:

https://devnotes.kymatica.com/BafangWebConfig/BafangWebCfg.html

 

[ampuk]

Yeh, I found that and translated it too, not really getting anywhere, but his settings are identical.

It's weird, almost like a rare locked version for some bike suppliers..?

Don't understand why the throttle is so unresponsive too, just like walk mode.

Maybe in comparison to 750w motor it just seems weak?

 

[guerney]

Don't understand why the throttle is so unresponsive too, just like walk mode.

Perhaps Bafang have limited the throttle to 6km/h for UK legality?

 

[ampuk]

You could try other configurators, there's also a new browser based one which I have never tried and am wary of, because it's new and could brick the controller. USE AT YOUR OWN RISK:

https://devnotes.kymatica.com/BafangWebConfig/BafangWebCfg.html

Ah, Not seen that before, worth a try in read only mode maybe....

Thanks.

 

[ampuk]

Perhaps Bafang have limited the throttle to 6km/h for UK legality?

Yeh, and somehow hard baked it into the firmware so it can't be changed....?

I showed the screenshot to a reputable UK ebike motor kit supplier, and they said, "No that doesn't look like a 250w motor firmware"...

But were unable or unwilling to help any more as they hadn't supplied the motor.

 

[ampuk]

The guy looks pretty brainy.

 

[peter.c]

It is not a road burner as the BBS02 750watt is, but if you want/ need the legal option and leave the throttle off ,it is ok, not found a way around settings just gave up and just put on another build

The 250watt 12 amps is a locked firmware a special factory order for a German supplier,
Mine is the legal eu version the amps setting in the firmware / controller are locked at 5 power levels
A throttle worked on mine once the setting is changed to amps level 5
Max power is 500watts peak for a very short burst [had to fit a watt meter display as after a 750watt it felt like no assist at first] Power average 100-200watts before it cuts off at speed setting
The battery range is very good even better than a tsdz2

 

[ampuk]

It is not a road burner as the BBS02 750watt is, but if you want/ need the legal option and leave the throttle off ,it is ok, not found a way around settings just gave up and just put on another build

The 250watt 12 amps is a locked firmware a special factory order for a German supplier,
Mine is the legal eu version the amps setting in the firmware / controller are locked at 5 power levels
A throttle worked on mine once the setting is changed to amps level 5
Max power is 500watts peak for a very short burst [had to fit a watt meter display as after a 750watt it felt like no assist at first] Power average 100-200watts before it cuts off at speed setting
The battery range is very good even better than a tsdz2

Thanks for that info.

What do you mean by "the setting is changed to amps level 5"?

Thanks again...getting somewhere.

 

[peter.c]

The throttle is set to current in the options and to the highest power level mine is 5 but could be level9

 

[ampuk]

Hi again,

Tried that, but no joy.

The throttle seems to be hard baked at 4mph.

PAS limits have been removed setting each power level to 10/20/30% of current etc and current limit not speed.

Thanks again.

 

[guerney]

Spotted this open source firmware for BBS02 and BBSHD:

BBS-FW: Open Source Firmware for BBSHD/BBS02 Controller

This open source project is finally ready for release! This firmware is intended to replace the original Bafang firmware on BBSHD/BBS02 motor controllers and can be flashed using the standard programming cable. Almost all functionality of original firmware has been reimplemented and additional...

endless-sphere.com

 

[marand]

Hi really sorry to bump an old thread but I have the same issue, did either of the people with this issue figure it out. There is really limited info on this, that this is the only thing coming up on a Google search.
Thanks

 

[guerney]

Hi really sorry to bump an old thread but I have the same issue, did either of the people with this issue figure it out. There is really limited info on this, that this is the only thing coming up on a Google search.
Thanks

Which issue? Throttle or controller amp limit? If absolutely necessary, why not give this Open Source Firmware a whirl? Not neccessary for the 15A X 36V = 540W firmware unlocked BBS01B on my 20" wheeled folding bike, and I question why 12A X 48V = 576W wouldn't be power enough for whatever bike you have. Is resolving whatever issue you're asking about worth the cost of a new controller if things go south, as might happen when installing new firmware? Your controller could be magically transformed into a brick.

BBS-FW: Open Source Firmware for BBSHD/BBS02 Controller

This open source project is finally ready for release! This firmware is intended to replace the original Bafang firmware on BBSHD/BBS02 motor controllers and can be flashed using the standard programming cable. Almost all functionality of original firmware has been reimplemented and additional...

endless-sphere.com

 

[marand]

Which issue? Throttle or controller amp limit? If absolutely necessary, why not give this Open Source Firmware a whirl? Not neccessary for the 15A X 36V = 540W firmware unlocked BBS01B on my 20" wheeled folding bike, and I question why 12A X 48V = 576W wouldn't be power enough for whatever bike you have. Is resolving whatever issue you're asking about worth the cost of a new controller if things go south, as might happen when installing new firmware? Your controller could be magically transformed into a brick.

BBS-FW: Open Source Firmware for BBSHD/BBS02 Controller

This open source project is finally ready for release! This firmware is intended to replace the original Bafang firmware on BBSHD/BBS02 motor controllers and can be flashed using the standard programming cable. Almost all functionality of original firmware has been reimplemented and additional...

endless-sphere.com

Thanks for the reply it’s the amp limited to 12a, I’d just never heard of it limited to 12a is all was just curious if others had found a reason for it.

 

[Bikes4two]

........ curious if others had found a reason for it.

What is the current limit of the controller? Maybe anything over 12amp might be too much for your particular configuration?