Fan Control

The NAS case for the Pine64 Rock Pro comes with a fan to cool the closed box. It is to be plugged in the FAN port of the board, as indicated on the Wiki Page.
By default, it will turn at full speed, but can be PWM-controlled, in particular with the software found on Github - ATS.
Install
The installation instructions are dead-simple:
git clone https://github.com/tuxd3v/ats
make
sudo make install
As explained on the repository, the fan has the following control:
Below 40°: normal operation, no fan
Between 40 and 60°, progressively increase the RPM
Above 60°: abnormal heat, full blow
Configuration
The default configuration is annoying (periodically loud) so the following variables were changed in the 
/etc/ats.conf file:
Variable
Value
MIN_CONTINUOUS_THERMAL_TEMP
45
ALWAYS_ON
true
MIN_PWM
20
PROFILE_NR
2