dell-r720-fan-control_local.sh

#!/bin/bash

ITERATION_NOW=0
ITERATION_MAX=4
ITERATION_SLEEP=10

restore_dynamic_control() {
  echo "Restoring dynamic fan control"
  ipmitool raw 0x30 0x30 0x01 0x01
}

set_speed() {
  if [ -z $1 ]; then
    echo "No speed set"
    exit 2
  fi
  correction=-5
  let speed_result=($1+$correction)
  hex_speed=$( printf "%x" $speed_result ) ;
  echo "Set speed: $speed_result% (0x$hex_speed)"
  ipmitool  raw 0x30 0x30 0x01 0x00
  ipmitool  raw 0x30 0x30 0x02 0xff 0x$hex_speed
}

on_error() {
  restore_dynamic_control
}

detect_speed(){
  #trap "on_error" ERR
  TEMP=$(ipmitool sdr type temperature | egrep "^Temp" | cut -d"|" -f5 | cut -d" " -f2 | sort -n -r | head -1)
  echo "Highest Temp: $TEMP C"

  if [[ "$TEMP" -ge "80" ]]; then
     set_speed 50
  elif [[  "$TEMP" -ge "76" ]]; then
     set_speed 45
  elif [[  "$TEMP" -ge "70" ]]; then
     set_speed 40
  elif [[  "$TEMP" -ge "67" ]]; then
      set_speed 34
  elif [[  "$TEMP" -ge "65" ]]; then
     set_speed 30
  elif [[  "$TEMP" -ge "62" ]]; then
     set_speed 27
  elif [[  "$TEMP" -ge "60" ]]; then
     set_speed 25
  elif [[  "$TEMP" -ge "50" ]]; then
     set_speed 23
  elif [[  "$TEMP" -ge "47" ]]; then
     set_speed 20
  elif [[  "$TEMP" -ge "40" ]]; then
     set_speed 17
  elif [[  "$TEMP" -ge "30" ]]; then
     set_speed 10
  elif [[  "$TEMP" -ge "20" ]]; then
     set_speed 7
  elif [[  "$TEMP" -ge "0" ]]; then
     set_speed 5
  else
     restore_dynamic_control
  fi
}

while :
do
  detect_speed
  ((ITERATION_NOW++));
  echo "Pres CTRL+C to stop..."
  if(($ITERATION_NOW >= $ITERATION_MAX))
  then
    break #Exit the loop.
  fi
  sleep $ITERATION_SLEEP
done