cooling fan in linux

[jonesong]

Hi guys,

Can someone tell me how to run the cooling fan in linux?

Thank you.

[Cuke]

I use two simple scripts for this.

Turn the fan on by enabling GPIO107.

#!/bin/bash
echo 107 > /sys/class/gpio/export
echo out > /sys/class/gpio/gpio107/direction
echo 1 > /sys/class/gpio/gpio107/value

Reverse the process to turn the fan off.

#!/bin/bash
echo 0 > /sys/class/gpio/gpio107/value
echo in > /sys/class/gpio/gpio107/direction
echo 107 > /sys/class/gpio/unexport

[jonesong]

Thanks for the reply. I have tried this before but it didn't work. The system responded the device is busy or unavailable... so I just tried another no like 108, it executed successfully. Why is 107 unsuccessful?

I'm using Geekbox_Lubuntu_V160309. How about you? Can you send me your linux version so I might flash it using TWRP.

[Cuke]

I'm using the same update rom but with an archlinux rootfs flashed over it. Not sure why 107 would not work for you, the device tree should be the same for both. Perhaps Lubuntu is locking 107 for its own use?

[Cuke]

You need to be root to access the gpio pins, sudo does not work. You need to "su" or login as root.