July 31, 20232 yr 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.
July 31, 20232 yr ...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.
July 31, 20232 yr Speed app would not let me increase amps over 12. [mention=19370]peter.c[/mention] 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" https://eunorau-ebike.com/products/bafang-bbs02b-motor-bafang-750w-mid-drive-kit-bafang-m315-conversion-kit
July 31, 20232 yr Author 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.
July 31, 20232 yr 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 " https://www.mtberos.com/tema/sorpresa-desagradable-motor-bafang.20796/ 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
July 31, 20232 yr 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
July 31, 20232 yr Author 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?
July 31, 20232 yr 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?
July 31, 20232 yr Author 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.
July 31, 20232 yr Author 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.
July 31, 20232 yr 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
July 31, 20232 yr Author 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.
July 31, 20232 yr The throttle is set to current in the options and to the highest power level mine is 5 but could be level9
August 1, 20232 yr Author 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.
August 15, 20232 yr Spotted this open source firmware for BBS02 and BBSHD: https://endless-sphere.com/sphere/threads/bbs-fw-open-source-firmware-for-bbshd-bbs02-controller.117092/
February 28, 20242 yr 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
February 28, 20242 yr 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. https://endless-sphere.com/sphere/threads/bbs-fw-open-source-firmware-for-bbshd-bbs02-controller.117092/ Edited February 28, 20242 yr by guerney
February 28, 20242 yr 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. https://endless-sphere.com/sphere/threads/bbs-fw-open-source-firmware-for-bbshd-bbs02-controller.117092/ 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.
February 28, 20242 yr ........ 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?
February 28, 20242 yr The firmware is locked 12 amps you just have to live with it Mine is now on my gravel bike and have just got on with pas only and no throttle ps not sure if the open source will work as it is a bbs01
February 28, 20242 yr What is the current limit of the controller? Maybe anything over 12amp might be too much for your particular configuration? That’s possibly why it’s not changeable. The firmware is locked 12 amps you just have to live with it Mine is now on my gravel bike and have just got on with pas only and no throttle thank you so much for your reply. I didn’t attach the throttle I’ll just get on with it as is. Maybe modify the pas levels to suit me.
February 28, 20242 yr You can adjust the pas levels to your personal taste ,but the biggest and best is to adjust the keep current mine is set to 100% Above all it needs the right gear to after a few tries settled for 42t front 11 rear not enough torque for a 52t front with 29er tyres
February 28, 20242 yr ps not sure if the open source will work as it is a bbs01 It won't, luckily I've haven't read reports of 36V BBS01B controllers being locked. Before removing the throttle from my bike, I did consider mucking about with Penoff's config tool, written in Delphi, but attempting limiting the throttle to 6km/h wasn't worth buying the latest version of Delphi, and possibly a new BBS01B controller if it got bricked in the process. That being said, I've remembered I have spare controller, which I blackmailed from my BBS01b seller with threats of thousands of bad Amazon reviews because he'd lied to me during pre-sale enquiries about having "Multiple diagnostic facilities throughout Europe", and I'd had to pay to post my dead controller to China for a "free" replacement - it wasn't free! I had to post it for £20! While it was being "Tested" for weeks in China using some unknown and imaginary firmware "Diagnostic tool" and awaiting him sending a new one for "Free" under warranty , I bought another controller from Greenbikekit after you posted a link and recommendation - thanks again for that. It's still working great, and at the recently increased current limit of 18A. I'd increase the limit to 20A, but I need 2A for the lights soldered to the bike battery, and it's BMS is limited to 22A continuous. On the bright side maybe I've dodged a bullet, perhaps 20 X 36 = 720W would cause my 20" wheeled Dahon Helios frame to permanently fold and snap? No sign of that at 648W - not yet anyway, touch aluminium. Fortunately I don't need 720W, even with 52T... 540W and 52T was ok dragging a 90kg+ bicycle trailer up steep hills. If I were still young and foolish, I'd get a 56T or 58T chainwheel, as I'm sure there'd be enough torque on 20" wheels at 20A. Particularly now I've lost over 3.5 stones. Edited February 29, 20242 yr by guerney
August 26, 20241 yr The firmware is locked 12 amps you just have to live with it Mine is now on my gravel bike and have just got on with pas only and no throttle ps not sure if the open source will work as it is a bbs01 Prompted by the sauerkraut hater, I questioned Bing's ChatGPT about this - it initially said yes the open source firmware was compatible... then that notional instance of a faked artificially "Intelligent" entity said:
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