fanMode
1.3.6.1.4.1.2011.2.235.1.1.8.1
Fan control mode manual or auto.
fan mode:
0 - auto
1 - manual
set format: <mode>,[timeout]
get format: <mode>,[timeout]
When <mode> = 0, the format is only <mode>.
[timeout] is option and value is in [0,300],unit is second,
When set, if fan mode is manual and without [timeout],
The default out time is 30 seconds.