README.MD

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README.md

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+# Dell OptiPlex 3050 Micro Fan Control Script
+
+This Bash script provides simple, temperature-based fan control for the **Dell OptiPlex 3050 Micro**. It's designed to reduce idle fan noise by lowering the fan speed when the system is cool, while still ramping it up appropriately under load.
+
+---
+
+## 📋 Overview
+
+By reading CPU temperature from the system's `hwmon` interface and adjusting the fan speed via PWM (pulse-width modulation), this script allows you to override the default, often overly aggressive fan behavior.
+
+---
+
+## ⚙️ How It Works
+
+1. **Monitors CPU Temperature**
+   - Reads from: `/sys/class/hwmon/hwmon1/temp1_input`  
+     *(Path may vary depending on your system — adjust as needed.)*
+
+2. **Controls Fan Speed**
+   - Writes PWM values to: `/sys/class/hwmon/hwmon2/pwm1`  
+     *(This controls the fan speed. Also may vary.)*
+
+3. **Temperature-Based Fan Speed Logic**
+
+   | Temperature (°C) | Fan Speed (PWM) | Approximate Speed |
+   |------------------|------------------|--------------------|
+   | < 50°C           | 25               | ~25%               |
+   | 50–59°C          | 45               | ~50%               |
+   | 60–64°C          | 60               | ~75%               |
+   | 65–74°C          | 120              | High               |
+   | ≥ 75°C           | 255              | Maximum            |
+   | ≥ 85°C           | 255 + warning    | Emergency max speed|
+
+4. **Failsafe Mechanism**
+   - If temperature exceeds **85°C**, the fan is forced to maximum and a message is logged to `/dev/kmsg`.
+
+---
+
+## 🧪 Requirements
+
+- A Linux system with PWM-capable fan control (`/sys/class/hwmon/...`)
+- Root access to write PWM values
+- Adjusted system paths if `hwmon1` and `hwmon2` differ on your machine
+
+---
+
+## 🚀 Usage
+
+1. Make the script executable:
+
+   ```bash
+   chmod +x fan_control.sh