Bafang m820

[brbr]

Just use an Y for the XT plug that comes from the battery or the charge plug, with a 36/43v->5v limiter that will work and cables are shy 10cm from the seatpost

Yep, that's smart! I will start building a prototype (when I have time...)
I was thinking maybe the lights could be triggered by the Bafang remote, and there was a way to even avoid the dedicated remote! that could be awesome, but I guess it will require more testing.
I need to understand what exactly triggering the lights does (is it just providing the voltage to the cable lights ? if yes, it could be used if we connect it to an IN PIN on the Arduino to trigger the servo...)

 

[shikhov]

Yep, that's smart! I will start building a prototype (when I have time...)
I was thinking maybe the lights could be triggered by the Bafang remote, and there was a way to even avoid the dedicated remote! that could be awesome, but I guess it will require more testing.
I need to understand what exactly triggering the lights does (is it just providing the voltage to the cable lights ? if yes, it could be used if we connect it to an IN PIN on the Arduino to trigger the servo...)

Please make wireless buttons for Bafang! After seatpost project

 

[brbr]

Please make wireless buttons for Bafang! After seatpost project

ahah, I think it's above my knowledge
Doing a RF controlled Servo is quite simple using an Arduino, I'm quite confident in having a working prototype, integrating everything as clean as the guy did in the video is another story

 

[brbr]

Another question, @LAnton, I've seen in the manual that for activation of the lights, you have to press 2 seconds on the upper arrow, I think it's too long to activate the dropper post!
Do you know if it's something ajustable with BESST tool ?

 

[LAnton]

Another question, @LAnton, I've seen in the manual that for activation of the lights, you have to press 2 seconds on the upper arrow, I think it's too long to activate the dropper post!
Do you know if it's something ajustable with BESST tool ?

I have not seen such settings in Besst.

 

[brbr]

Quick question guys, do I need some extra XT30 plugs to connect the motor and battery ?
I think I'm going to wait for the bafang one, what's the default interface between the motor and the battery ?

 

[temon10]

Quick question guys, do I need some extra XT30 plugs to connect the motor and battery ?
I think I'm going to wait for the bafang one, what's the default interface between the motor and the battery ?

With 720Wh CEF50 battery no need extra plugs

 

[stuff]

Quick question guys, do I need some extra XT30 plugs to connect the motor and battery ?
I think I'm going to wait for the bafang one, what's the default interface between the motor and the battery ?

not for the BT F014 either

 

[brbr]

Thanks !

 

[temon10]

@LAnton or others who already have M820 36v. Do your engine have the same firmware like mine?

 

[forsa355]

still unsure if the Besst software will work with blutooth (i.e. not cable). So just to be sure, I want to order a programming cable. What is needed with the M820? Something like this? https://www.aliexpress.com/item/100...0!sea!CA!108350606&curPageLogUid=OwNBO1rYZNql

 

[temon10]

still unsure if the Besst software will work with blutooth (i.e. not cable). So just to be sure, I want to order a programming cable. What is needed with the M820? Something like this? https://www.aliexpress.com/item/1005004206955360.html?spm=a2g0o.productlist.main.7.3a1c5d33hHMp0m&algo_pvid=84b0af28-8c31-4ed8-8699-8d8c929b1c68&algo_exp_id=84b0af28-8c31-4ed8-8699-8d8c929b1c68-3&pdp_npi=3@dis!CAD!83.2!45.76!!!!!@211bf12316852099659696775d07ae!12000029516334220!sea!CA!108350606&curPageLogUid=OwNBO1rYZNql

 

[LAnton]

@LAnton or others who already have M820 36v. Do your engine have the same firmware like mine?

View attachment 115814

 

[mike_kelly]

Just to clarify the Besst tool requires a dealer user ID and password, or a bypass script, for any use? Or can you do basic things like changing the assist levels without the login?
Thanks

 

[temon10]

Just to clarify the Besst tool requires a dealer user ID and password, or a bypass script, for any use? Or can you do basic things like changing the assist levels without the login?
Thanks

U have to login for changing parameter. U can get username and password from your seller.

 

[temon10]

View attachment 115985

I will ask Linda if they can ask bafang for new firmware.

 

[forsa355]

View attachment 115947

ok so just to be sure... do I need the $145 Besst box, cable with orange connectors etc. or can I get by with just the $42 usb cable?

 

[temon10]

ok so just to be sure... do I need the $145 Besst box, cable with orange connectors etc. or can I get by with just the $42 usb cable?

If U only need to change speed limit and wheel size just buy $42 cable. But if U wanna change level parameter setting buy Besst tool.

 

[forsa355]

If U only need to change speed limit and wheel size just buy $42 cable. But if U wanna change level parameter setting buy Besst tool.

ah, ok. Was hoping it was the cheaper option! Maybe I'll wait and see if the Bafang Go+ gets updated to work with setting M820 parameters before I fork out the money for the full Besst tool

 

[LAnton]

Can the M820 be connected to garmin 1030, 1040?

 

[patdam]

Can the M820 be connected to garmin 1030, 1040?

hi lanton. You can do that (connect bafang to garmin edge) with the m510 (or other motors from bafang) ?

 

[LAnton]

hi lanton. You can do that (connect bafang to garmin edge) with the m510 (or other motors from bafang) ?

I don't have garmin.

 

[temon10]

Can the M820 be connected to garmin 1030, 1040?

same hope

 

[clix]

I don't have a motor yet, but probably it can't. It would have to support ANT+ protocol, and I have not seen it mentioned anywhere for any bafang motor. Which is a shame.

 

[LAnton]

Bluetooth?

 

[temon10]

is there any detail dimension for Bafang BT F014 battery? so we build our custom DIY battery that can fit into Lightcarbon frame or Tantan frame.

 

[Freda]

is there any detail dimension for Bafang BT F014 battery? so we build our custom DIY battery that can fit into Lightcarbon frame or Tantan frame.

 

[temon10]

View attachment 116606
View attachment 116607

With 470x52x63 I just calculate if we use 18650 cells we can get 10s4p configuration. If we use 3500mAh cells we can get 518Wh capacity. Any thoughts guys?

 

[Freda]

With 470x52x63 I just calculate if we use 18650 cells we can get 10s4p configuration. If we use 3500mAh cells we can get 518Wh capacity. Any thoughts guys?

Sounds like a good plan. I was planning to use 21700 5000mAh cells, 12s3p. That would give 645Wh theoretical.

 

[temon10]

Sounds like a good plan. I was planning to use 21700 5000mAh cells, 12s3p. That would give 645Wh theoretical.

Will it fit to the frame?