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  1. M

    New "TSDZ2 Torque Sensor Central Motor"

    Just an aside ... still rocking a TSDZ2 in one cargo bike, Bosch CX in other cargo bike ... there is a very interesting new type of motor that is being released, mechanically looks very interesting https://bikerumor.com/tq-hpr50-ebike-motor-harmonic-pin-ring-transmission/ Cheers
  2. M

    TSDZ2 OSF for all displays, VLCD5-VLCD6-XH18, LCD3, 860C-850C-SW102.

    It sounds like you still have a scenario where you have tx,rx reversed. Ie by replacing the VLCD5 plug you have wired it correctly to work with the rest of the wiring and it remains reversed for the other two screens?
  3. M

    TSDZ2 mid drive with 860C, 850C or SW102 displays only -- Flexible OpenSource firmware (Casainho code only)

    Likely the 850c screen is a 2021 version (check the back) which this version of the firmware does not support. You need to use the mrbusa forked firmware.
  4. M

    New "TSDZ2 Torque Sensor Central Motor"

    Just had something pop in my motor. Approx 3000km on a heavy cargo bike I thought a shaft had broken, it was a loud crack noise, but I pulled it apart and both the motor and main gear shafts are fine. Looks like the one way clutch in the blue gear has gone! Haven't read about this one before...
  5. M

    TSDZ2 OSF for all displays, VLCD5-VLCD6-XH18, LCD3, 860C-850C-SW102.

    Low battery cutoff setting
  6. M

    TSDZ2 OSF for all displays, VLCD5-VLCD6-XH18, LCD3, 860C-850C-SW102.

    Haven’t done this myself, but can’t see any reason why not. Yes the discharge curve is a bit flatter but as long as you enter the right low voltage cutoff and max current. Obviously don’t use the cell count / battery voltage tables in the manual. Out of interest what cells and how many?
  7. M

    New "TSDZ2 Torque Sensor Central Motor"

    There is a newer version of the 850c display that I am only aware of one of the TSDZ2 versions working on https://github.com/emmebrusa/TSDZ2-Smart-EBike-860C/releases/download/v20.1C.3-860C/850C_2021_v20.1C.2-bootloader.bin Of course the motor needs the matching firmware too...
  8. M

    New "TSDZ2 Torque Sensor Central Motor"

    Thank you for performing these tests. It helps explain why quieter motors have multiple nylon step downs. Very quiet motors seem to have carbon belt drives. It is also interesting as the code is refined some of the motor harmonics are reducing over time - anecdotally a lot of motor noise at...
  9. M

    New "TSDZ2 Torque Sensor Central Motor"

    Love it, congrats on your build, looks great
  10. M

    New "TSDZ2 Torque Sensor Central Motor"

    If its a 2021 850c likely won't work until a patch is applied to the existing code
  11. M

    New "TSDZ2 Torque Sensor Central Motor"

    The black wire in the loom going to the display is GND. They moved it at some point. Just splice into that. For reference here is a video I made a while ago, near the end if you look carefully you can see the black wire in the display loom goes off somewhere else on the board...
  12. M

    TSDZ2 mid drive with 860C, 850C or SW102 displays only -- Flexible OpenSource firmware (Casainho code only)

    Here is the post. I don't have a build env so I can't patch sorry https://endless-sphere.com/forums/viewtopic.php?f=30&t=93818&p=1623369&hilit=850c#p1623369
  13. M

    TSDZ2 mid drive with 860C, 850C or SW102 displays only -- Flexible OpenSource firmware (Casainho code only)

    They are recoverable. There was a post about this a few months ago. Someone had a patch for the newer 850c display but I don’t believe it was ever submitted. If you flash the 860 firmware on your 850 screen and you see the boot screen on believe it should work. Let me try to find the post
  14. M

    New "TSDZ2 Torque Sensor Central Motor"

    Nice one. While it was working did you notice any difference in noise profile!
  15. M

    New "TSDZ2 Torque Sensor Central Motor"

    From an earlier post I made I have been obsessing over Q Factor for some time now. I bought some replacement cranks and measured against the bundled TSDZ2 cranks. Here are the results for my bike with bottom bracket width 70mm. Original TSDZ2 crank arms (edited to make clearer) 206mm (offset...
  16. M

    TSDZ2 mid drive with 860C, 850C or SW102 displays only -- Flexible OpenSource firmware (Casainho code only)

    I tried the setup you have above. Never got it to work. Either the step up converter didn’t have enough juice or the USB port couldn’t supply enough. I ended up adding a cable to supply the display direct from the battery. Make sure you connect both the USB/UART output ground to the battery...
  17. M

    TSDZ2 OSF for all displays, VLCD5-VLCD6-XH18, LCD3, 860C-850C-SW102.

    I have also noticed a discrepancy for SOC on my 860c running 0.20c ... I also run an external coulomb counter ... with the external coulomb counter at around 20% capacity left, the 860c is showing 33%. I just double checked my coulomb counter and it seems I de-rated the battery in that by more...
  18. M

    New "TSDZ2 Torque Sensor Central Motor"

    Very interesting. I bought a booster a while ago but was wary of the quality of the power coming from it. I have a scope now so I can put it under load and see what it looks like. Certainly you want to keep the set output voltage closer to the battery voltage. Only the boost voltage different...
  19. M

    New "TSDZ2 Torque Sensor Central Motor"

    Low battery cutoff?
  20. M

    TSDZ2 OSF for all displays, VLCD5-VLCD6-XH18, LCD3, 860C-850C-SW102.

    Also there was a bug that was fixed a week or so after the original release it was reading 10 deg too high. Flash the motor again with the latest
  21. M

    TSDZ2 OSF for all displays, VLCD5-VLCD6-XH18, LCD3, 860C-850C-SW102.

    Some feedback for TSDZ2-v20.1C I have been running the firmware with stock settings, only changes originally to config were setting 36v battery and capacity, street mode. I am using Hybrid mode on a heavy Cargo bike. The responsiveness with default settings is an improvement over V1.1...
  22. M

    TSDZ2 OSF for all displays, VLCD5-VLCD6-XH18, LCD3, 860C-850C-SW102.

    I believe you are disregarding some of the unknown variables that make your request next to impossible. Wind speed and direction Gradient Weight of bike and rider All of these work together such that the level of assistance required at anyone time to be a guess at best. At low speeds rate of...
  23. M

    TSDZ2 OSF for all displays, VLCD5-VLCD6-XH18, LCD3, 860C-850C-SW102.

    Sounds like you should be using power mode without boost and lower the current ramp. Otherwise you will have to patch the code. Could you explain a scenario when you need this behaviour? Can you confirm the range of your torque sensor?
  24. M

    TSDZ2 OSF for all displays, VLCD5-VLCD6-XH18, LCD3, 860C-850C-SW102.

    Thank you for your comments. I will try power only mode with boost as well then, maybe it is what I am looking for. Loving the fact the boost response curve is calculated, much more elegant. It certainly makes me realise that our other cargo bike with a Bosch motor (rated 250W) must be pulling...
  25. M

    TSDZ2 mid drive with 860C, 850C or SW102 displays only -- Flexible OpenSource firmware (Casainho code only)

    There is a new version of the 850c that needs a patch to work with any of the current released code bases
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