From e8822a14f3f561d65053854278d657ab1121bd84 Mon Sep 17 00:00:00 2001
From: david <david@socialnerds.org>
Date: Sat, 23 Sep 2023 18:48:47 +0200
Subject: [PATCH] updated hc4_fancontrol to version 0.2.0

---
 hc4_fancontrol.sh | 73 ++++++++++++++++++++++++++++-------------------
 1 file changed, 43 insertions(+), 30 deletions(-)

diff --git a/hc4_fancontrol.sh b/hc4_fancontrol.sh
index bbc201e..814b57b 100755
--- a/hc4_fancontrol.sh
+++ b/hc4_fancontrol.sh
@@ -10,46 +10,59 @@ VERSION="0.2.0"
 LICENSE="GPLv3"
 
 # Configuration
-THRESHOLD=42000
-DISTANCE=2000
-INTERVAL=30
-STEPS=(120 160 210 255)
+THRESHOLD=45000
+DISTANCE=1000
+INTERVAL=10
+STEPS=(80 120 160 210 255)
 FAN="/sys/class/hwmon/hwmon2/pwm1"
 
+# Get all temperature readings and return the highest value
 function get_temp() {
-  local TEMP=($(cat /sys/devices/virtual/thermal/thermal_zone*/temp))
-  for I in ${TEMP[@]}; do
-    echo "temp: $I"
+  local TEMPS=($(cat /sys/devices/virtual/thermal/thermal_zone*/temp))
+  local RESULT=${TEMPS[0]};
+  for TEMP in ${TEMPS[@]}; do
+    if [ $TEMP -gt $RESULT ]; then
+      RESULT=$TEMP
+    fi
   done
+  echo $RESULT
 }
 
-# set fan mode to manual
+# Get current fan speed
+function get_speed() {
+  local SPEED=$(cat $FAN)
+  echo $SPEED
+}
+
+# Set new fan speed
+function set_speed() {
+  local CURRENT_SPEED=$(get_speed)
+  local NEW_SPEED=$1
+  if [ $CURRENT_SPEED -ne $NEW_SPEED ]; then
+    echo $NEW_SPEED > $FAN
+    sleep 3
+  fi
+}
+
+# Set fan mode to manual
 echo "disabled" | tee /sys/class/thermal/thermal_zone{0,1}/mode > /dev/null
 
-# set fan speed to max if either cpu or ram is above $THRESHOLD
+# Run loop
 while true; do
-  TOOHOT=0
-  FANSPEED=$(cat $FAN)
-  TEMP=($(cat /sys/devices/virtual/thermal/thermal_zone{0,1}/temp))
-  for i in ${TEMP[@]}; do
-    if [ $i -gt $THRESHOLD ]; then
-      TOOHOT=255
-    fi
-  done
-  if [ $TOOHOT -eq 0 ]; then
-    if [ $FANSPEED -ne $TOOHOT ]; then
-      echo 170 > $FAN; sleep 2
-      echo 120 > $FAN; sleep 2
-      echo $TOOHOT > $FAN
-    fi
+  TEMP=$(get_temp)
+  SPEED=$(get_speed)
+  NEW_THRESHOLD=$THRESHOLD
+  if [ $TEMP -gt $THRESHOLD ]; then
+    for STEP in ${STEPS[@]}; do
+      if [ $TEMP -gt $NEW_THRESHOLD ]; then
+        NEW_THRESHOLD=$((NEW_THRESHOLD + DISTANCE))
+        if [ $SPEED -lt $STEP ]; then
+          set_speed $STEP
+        fi
+      fi
+    done
   else
-    if [ $FANSPEED -ne $TOOHOT ]; then
-      echo 120 > $FAN; sleep 2
-      echo 170 > $FAN; sleep 2
-      echo $TOOHOT > $FAN
-    fi
+    set_speed 0
   fi
-  # debug output
-  #echo "temp=${TEMP[@]},speed=$FANSPEED, toohot=$TOOHOT"
   sleep $INTERVAL
 done