Example Baseboard Fan Control


The goal of this wiki page is to provide information on how to control the fan on the development kit.


The files that normally control the fan are located in /sys/class/hwmon/hwmon0. Information about this driver is available here.

On the development kit, the fan is either on (at 13000 rpm) or off.

The pre-built image for the development kit has the fan connected to the kernel's cpu cooling maps. (see Example_SOM_Temperature_Monitors for more information) In this mode, manual control of the fan is not really possible. You might try to turn it off but the kernel might just turn it right back on. If you want manual control, you will need to unhook the fan from the kernel's cpu cooling maps.

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