Update README.md

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@ -4,3 +4,20 @@ If the inlet temperature is above 35deg C enable iDRAC dynamic control and exit
If inlet temp is below 35deg C set fan control to manual and set fan speed to predetermined value.
The tower servers T320, T420 & T620 inlet temperature sensor is after the HDDs so temperature will
be higher than the ambient temperature.
You can change the temperature set points in the script to sute your needs.
I use this script on a Dell T320 running TrueNAS 12 and it work great. You will need to create a data
set for the script to recide in and make it excicutable, run chmod +x /mnt/tank/fan_control/fan_control.sh
this assumes that you have a pool called tank and an dataset named fan_control.
You can test the script by running ./fan_sontrol.sh from the scrips directory. If it is working you should
get an output similar to this;
Date 04-09-2020 10:24:52
--> iDRAC IP Address: 192.168.40.140
--> Current Inlet Temp: 22
--> Temperature is below 35deg C
--> Disabled dynamic fan control
--> Setting fan speed to 20%