first commit

pwm_fan_control.sh

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+#!/bin/bash
+
+# Path to the temperature sensor and PWM control
+TEMP_SENSOR="/sys/class/hwmon/hwmon1/temp1_input"
+PWM_CONTROL="/sys/class/hwmon/hwmon2/pwm1"  # Adjust this path as needed
+
+# Function to set fan speed using PWM control
+set_fan_speed() {
+    local speed=$1
+    echo $speed | sudo tee $PWM_CONTROL
+}
+
+# Wait for the hwmon files to be available
+while [ ! -f "$TEMP_SENSOR" ] || [ ! -f "$PWM_CONTROL" ]; do
+    echo "Waiting for hwmon files..."
+    sleep 1
+done
+
+echo "hwmon files found. Starting fan control."
+
+# Main loop
+while true; do
+    # Read the current temperature
+    temp=$(cat $TEMP_SENSOR)
+    temp=$((temp / 1000))  # Convert to degrees Celsius
+
+    # Print the current temperature
+    echo "Current temperature: $temp°C"
+
+    # Adjust fan speed based on temperature
+    if [ $temp -lt 50 ]; then
+        set_fan_speed 25  # Approximately 25% speed
+    elif [ $temp -lt 60 ]; then
+        set_fan_speed 45  # Approximately 50% speed
+    elif [ $temp -lt 65 ]; then
+        set_fan_speed 60  # Approximately 75% speed
+    elif [ $temp -lt 75 ]; then
+        set_fan_speed 120  # High speed
+    else
+        set_fan_speed 255  # Maximum speed
+    fi
+
+    # Check for critical temperature
+    if [ $temp -ge 85 ]; then
+        echo "Critical temperature reached: $temp°C" | sudo tee /dev/kmsg
+        set_fan_speed 255  # Ensure fan is at maximum speed
+    fi
+
+    # Sleep for a while before checking again
+    sleep 10
+done