Hello. I've just bought Fiido D2, and your forum seems to be the most useful of all I saw..
So, Fiido has WK3615MS controller, that is set up very strange. It has pedal assist mode, that turns on after 2 full crank rounds, and it always gives about 50% of power to motor. I tested it today, and in pedal assist mode bike reachs about 14km/h independent on cadence.
I don't like this behavior, so my first idea was to insert some microcontroller between PAS and controller with some logic of increasing frequency PAS. It could help to start assisting faster by pushing 24 impulses in a short period of time when I start pedaling, but it seems it can't solve speed problem.
And the second idea is to change a controller, and brainpower+s866 seems to be quite enough and not so expensive. But the only question is - what is the logic of pedal assist of brainpower? Does it just use constant power depending on choosen PAS level? Or it changes assisting power depending on both PAS level and cadence?
Thanks.