hogofwar
New here
I've been looking at getting this if the 26" one ever comes back into stock. Or is there any other similarly priced 250w rear hubs kits with torque sensor which is pretty inconspicuous?
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First DIY conversion kit with cassette integrated torquesensor
- Thread starter stancecoke
- Start date
stancecoke
Minor legend
I don't know a similar set at the moment.
I know, that there are hub motors from Bofeili, Truckrun and Aikema with the Kclamber cassette sensor, but I guess, they are for OEMs only.
@mechaniker has built several test bikes with various sensored motors already, but a Plug&Play set like the A3 from Yose is still the only one that is (was) available commercially.
I'm recently using a Hailong battery integrated JYT controller (with the EBiCS firmware) recently on my commuter bike
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atlet
New here
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- Sep 26, 2022
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hogofwar
New here
That looks interesting! Though it does have less torque, and seems to require using a phone as a display. My biggest concern though would be the battery cells, which they don't mention a brand for. As someone who has no ebike knowledge that throws me a bit.
stancecoke
Minor legend
The (wireless) display is optional, I think. And there is no information about the torquesensor. No photo, if it is the one from KClamber...Just one sentence in the description
So quite an adventure to buy one.
Delivery time 45 days and 100$ shipping costs
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hogofwar
New here
I contacted Yose Powers about the A3 Pro for 26" wheels, and they seem to be expecting more stock in 2-3 months.
I'm very interested in the A3 pro kit for the stealth aspect of the bottle battery and minimal wiring coupled with the torque sensor in the motor. A little concerned about no online docs (I expect this is easy to install though) and spare batteries don't seem to be available yet.
Is there anywhere to find to find a long-term review of a kclamber motor torque sensor or similar technology? Anyone with experience?
Is there anywhere to find to find a long-term review of a kclamber motor torque sensor or similar technology? Anyone with experience?
stancecoke
Minor legend
You can ask at the German Pedelecforum, there is at least one guy who uses the A3 set since this summer:
Nice to see, that the sets are in stock again, after they were sold out for month
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Who is "they"?
This topic is about a hub motor with integrated torque sensor.
I can't find any information if this is the case with this rear hub motor too.
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Truckrun, chinese company. Those hub motors with cassette tq sensor are popping up from time to time on aliexpress or similar chinese platform under different brands.
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stancecoke
Minor legend
We discussed it in this thread:
Truckrun RN04 hub motor with torque sensor
I'm thinking about trying the Truckrun RN04 rear hub motor with integrated torque sensor. A few questions: Is it any good? Or are there better options with through axle? What kind of controller would I need? On Aliexpress there are kits, but it is unclear which controller is included. Thanks!
endless-sphere.com
So the controller has to match to the protocol version.
It makes no sense to buy a single motor, you won't get a matching controller
Is this table correct Stancecoke ? It's the extracted kclamber uart protocol based on this code: EBiCS_Firmware/Src/hubsensor.c at Kclamber_v2 · EBiCS/EBiCS_Firmware The listing is reversed, since your code scans for the eoff byte and works backwards.We discussed it in this thread:
The problem is still the availability of a suitable controller. KClamber has two different UART protocols meanwhile. The old one has 7 bytes message length, the new one 8 bytes. The new one spends one full byte for the temperature.Truckrun RN04 hub motor with torque sensor
I'm thinking about trying the Truckrun RN04 rear hub motor with integrated torque sensor. A few questions: Is it any good? Or are there better options with through axle? What kind of controller would I need? On Aliexpress there are kits, but it is unclear which controller is included. Thanks!
So the controller has to match to the protocol version.
It makes no sense to buy a single motor, you won't get a matching controller
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stancecoke
Minor legend
The byte order is vice versa, but it's correct in principle. And this is the 8Byte protocol. The 7Byte protocol is in another branch.
Thanks. This means I have to write a condition in lisp that checks for message length first based on the 0xff byte, and adapts the parser accordingly. If the only thing changing is the temperature byte, it should be straightforward.
stancecoke
Minor legend
My solution is a little quick and dirty. The sensor sends the data without a defined break between the messages, so the "UART idle" interrupt, that I use for the display communication, doesn't work for the sensor. Now I read slices of 16 bytes by DMA and search for a valid message within this slice. It works reliably, but I miss every second message this way. But it's still fast enough for a smooth assistance behaviour.
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Yes so I've seen in the code. Without a dedicated start byte and timeouts, I don't see how to do it otherwise in order to be sure to capture a full sequence. I'll have to do the same in lisp, and setup a 16B buffer for uart_read to filter out.
themountain
New here
Any updates on this kit ?
stancecoke
Minor legend
More and more conversion kits using the Kclamber cassette integrated sensor are popping up:
With JYT or Kunteng controller, choosable as options:
With Tongsheng controller:
https://wooshbikes.co.uk/?85TS
With JYT or Kunteng controller, choosable as options:
With Tongsheng controller:
https://wooshbikes.co.uk/?85TS
stancecoke
Minor legend
Kunteng will have built a special controller with a new firmware, that reads the UART messages of the cassette integrated torque sensor from the white wire of the motor connector. There is no classical "PAS" signal, all information like torque, cadence, wheel speed, motor temperature is transmitted by the UART protocol.
I wonder, if Kunteng is using a faster processor now, or if the old 8bit STM8 is capable of this additional UART job.
stancecoke
Minor legend
You should read this thread from the beginning
I wonder, why the Kuntengs are more expensive than the JYTs. The JYTs are FOC controllers. I'm using the JYT from YosePower for the Hailong Battery holder with this sensor, but of course with the EBiCS firmware.
This is a really clean and stealthy setup.
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