How to control fan speed precisely?

Which Khadas SBC do you use?


Which system do you use? Android, Ubuntu, OOWOW or others?


Please describe your issue below:

I want to control my 3705 fan speed precisely.
I already know how to change fan speed level (low / mid / high).
but what I want to know is how to set fan speed when low level / mid level / high level respectively.

I ask because the fan is too noisy even on low level.

I want to use fan as “auto” mode.
but want to lower fan speed more when the fan is on low level in auto mode.

below topic may be solution in vim4 forum,
( How to change lowest fan speed? - #2 by numbqq )
but I don’t know to apply to vim3…

thank you!

Wait you’re on kernel 4.9, check this post Customize fan activation temperature on ubuntu

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