Fan Control Instructions for SBC Android System

1. '/sys/class/fan/enable' Controls the fan power state.

1. Write '0' to turn the fan off.
2. Write '1' to turn the fan on.

2. '/sys/class/fan/mode' Controls the fan operation mode.

1. Write '0' for manual control mode.
2. Write '1' for automatic control mode (the fan speed adjusts automatically based on the SoC temperature).

3. '/sys/class/fan/level' Controls the fan speed in manual mode. Range: '1' to '5'.

1. Write '1' for the minimum fan speed.
2. Write '5' for the maximum fan speed.

Turn the fan off

$ echo 0 > /sys/class/fan/enable

Set the fan to automatic mode

$ echo 1 > /sys/class/fan/enable
$ echo 1 > /sys/class/fan/mode

Set the fan to minimum speed (manual mode)

$ echo 1 > /sys/class/fan/enable
$ echo 0 > /sys/class/fan/mode
$ echo 1 > /sys/class/fan/level

Set the fan to maximum speed (manual mode)

$ echo 1 > /sys/class/fan/enable
$ echo 0 > /sys/class/fan/mode
$ echo 5 > /sys/class/fan/level