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  1. G

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

    Maybe that was referring to a 13s battery - 43v LVC would be ok for that but is a bit low for 14s.
  2. G

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

    Ah right, that battery has a 58.8v charger which confirms it as 14s (14 x 4.2v). So as you were, use 58.8v as the max voltage and 46v for LVC. That's a fairly 'safe' LVC, 43v was likely to push the cells down near 3v which is getting into dangerous territory....:)
  3. G

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

    Ok, I was presuming from your mention of 58.8v in a previous post that your battery was 14s (i.e. 14 cell groups in series) - now I'm not sure. Do you know the configuration of your battery? (probably 13s or 14s) If you're not sure, what's the measured battery voltage when fully charged?
  4. G

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

    43v seems a bit low for a 14s battery, if you search online for lipo discharge curves you'll find that the cells generally have little useful charge below around 3.3v and some may start to 'fall off the cliff' if you push them much below this. I'd be inclined to start at 46v LVC and then road...
  5. G

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

    This has always been the case on the BBS02 too (All fw versions). Same with both C961 and 750C displays. I've never bothered to mention it before, as you say it's no more than a mild annoyance. Just a detail Daniel could check in a future update maybe...
  6. G

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

    For me 'Keep current' is all about having a strong startup from stationary that doesn't run away with you when up to your comfortable pedal speed. It allows you to use a higher assist level for stronger starts but then backs off to your 'cruise' level of assist once rolling. Can't remember...
  7. G

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

    Sorry, but I don't have a BBSHD or any firmware for it. Bafang hex file links are available on the web (and back in this thread I think), suggest you do a quick search.... Or are you referring to Daniel's firmware?
  8. G

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

    Yes, the Bafang BBS units are great pieces of hardware, quiet, powerful and pretty reliable but somewhat let down by some rather inaccessible and cranky oem firmware. Daniel's fw offers an easy to understand and configure user interface and gives a drive that operates smoothly without any...
  9. G

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

    Bafang (BBS02) 48v 750w file attached. I've got a suspicion that I may have been selecting the wrong clock frequency in the STC programming tool when trying these Bafang hex files (should be 18.432MHz), which would explain why I could get none of them to work. So maybe you'll have some success...
  10. G

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

    Hi, that was a while back now, but I'm pretty sure I've still got it stored on my pc somewhere, I'll see if I can dig it out. Haven't got any spare time today but should be able to do this tomorrow.
  11. G

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

    The battery state of charge is usually detected by monitoring the battery voltage, this isn't ideal as the voltage sags significantly whilst under load which would show a falsely low soc. The method often used to get round this issue is for the firmware to only update the soc display when there...
  12. G

    Really strange KT controller issue, help please!

    .....certainly seems plausible if it's working for you. Those mosfet type numbers look fairly similar, it would be interesting to know if there's any difference in the specs. All my experience with the KT controllers has been with the 6fet type, the early versions I used had the K150E09NE...
  13. G

    Really strange KT controller issue, help please!

    With the Kunteng open source fw there was an issue with the main branch in that when the torquesensor code was selected it produced random processor overloads and resets, with symptoms virtually identical to those you describe. Eventually the developer created a new branch with the tqsr code...
  14. G

    KT motor controllers -- Flexible OpenSource firmware for BMSBattery S/Kunteng KT motor controllers (0.25kW up to 5kW)

    Yes, if I remember correctly, you solder the tqsr signal wire to X4 (white wire usually), if you're using a throttle it stays connected to the throttle input as normal.
  15. G

    KT motor controllers -- Flexible OpenSource firmware for BMSBattery S/Kunteng KT motor controllers (0.25kW up to 5kW)

    A small negative adjustment of -= 2 or -= 3 has always worked for me in the past, but you'll need to experiment to find what works for you. I should also add that if you use a torquesensor with the Master branch you will almost certainly get issues with processor overloads and resets. The tqsr...
  16. G

    KT motor controllers -- Flexible OpenSource firmware for BMSBattery S/Kunteng KT motor controllers (0.25kW up to 5kW)

    If you do a search for "zero point" on this thread you should find references to what Stancecoke has mentioned on the German forum. Post #3455 on this thread makes reference to this, but there are probably many more.
  17. G

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

    Ah...good news. Just wondered which OEM fw you used, all the versions I tried on my failed controller gave 'error 30' (comms error) after flashing. This is now making me wonder if I was using the correct clock frequency, I can't remember what setting I was using. Do you have a link to the fw you...
  18. G

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

    Just guessing here, but I think it's just the battery voltage which is not communicated (or it's being communicated as zero...) so the fw operates in lvc mode only. I've a feeling that the answer to this issue is probably quite simple but lacking a developer brain I can't go any further with...
  19. G

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

    Yep, that sounds exactly like the outcome I had on my first flashing attempt. It's caused by a lack of communication between the controller and display, you've probably already seen the various messages regarding this starting from page 4 of this thread. In my case the only cure was a...
  20. G

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

    I'm using 1.3.0 with a BBS02b and from my experience the throttle and pas blend quite seamlessly together, there's no feeling of one taking precedence over the other. I'd guess that the fw takes its signal from whichever one gives the highest input at any given moment. There's a thread...
  21. G

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

    Now working correctly in v1.3.0, thanks for sorting that Daniel.
  22. G

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

    When you run the STC programming software there's an option to 'Check MCU' which shows the chip type. You'll find more details in the 'Flashing the firmware' Github page:- Flashing the Firmware
  23. G

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

    @Daniel, I've just rechecked this and the power up throttle guard feature definitely seems to be non functional in the BBS02 fw. As stated, if I power up with active throttle applied the bike immediately takes off. It's not a big problem, but if you need me to try any further tests please just...
  24. G

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

    Both the drives I refer to in this and previous messages are BBS02B's. For me one flashed ok, the other would not communicate with the display after flashing, but this may have been clumsy plugging/unplugging on my part. Daniel is not yet convinced that all BBS02 controllers are compatible with...
  25. G

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

    ....I must admit that I was surprised you hadn't included this safeguard, and clearly - you had. I'm sure the bike was taking off with 'throttle min' set too low - I had the comical battle of desperately trying to get to the battery switch on a bike that was trying to disappear out of the...
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