WOL Server - Wake-on-LAN Control Panel for Raspberry Pi

A lightweight web-based Wake-on-LAN control panel designed for Raspberry Pi that lets you remotely power on and shut down your network devices.

Features

• Simple Web Interface: Boot and shut down your server with a clean, responsive UI
• Status Monitoring: Check if your target device is online with auto-refreshing UI
• Scheduled Backup Window: Configure automatic daily, bi-daily, weekly, or monthly server startup and shutdown for backup operations
• Auto Shutdown: Shut down the server automatically at the end of the backup window
• Smart Shutdown Protection: Only auto-shuts down servers that were started by the scheduler
• Passwordless Operation: Uses environment variable for all shutdown operations
• Multiple Shutdown Methods: Supports various SSH authentication methods for reliable automatic shutdown
• Raspberry Pi Optimized: Built specifically for ARM processors found in all Raspberry Pi models
• Secure Shutdown: Password-protected shutdown functionality
• Lightweight: Minimal resource usage ideal for running on even the oldest Pi models
• Easy Setup: Simple installation process with clear instructions

Installation

Prerequisites

• Raspberry Pi (any model) running Raspberry Pi OS
• Network connection
• Basic knowledge of SSH/terminal

Option 1: One-Command Installation

1. Download the latest release on your local machine from the Releases page

2. Transfer the package to your Raspberry Pi using SCP:

   scp wol-server.tar.gz pi@your-pi-ip:~/
   

3. SSH into your Raspberry Pi:

   ssh pi@your-pi-ip
   

4. Install with a single command:

   tar -xzf wol-server.tar.gz && ./install.sh
   

5. Access the web interface at:

   http://your-pi-ip:8080
   

Option 2: Manual Installation

If you prefer a manual approach or encounter issues with the automated install:

1. Create installation directory:

   mkdir -p ~/wol-server/templates
   

2. Transfer and install program files:

   # Copy the executable
   cp wol-server-arm6 ~/wol-server/wol-server
   chmod +x ~/wol-server/wol-server
   
   # Copy template files
   cp templates/* ~/wol-server/templates/
   
   # Create .env file
   cat > ~/wol-server/.env << EOL
   SERVER_NAME=pippo
   SERVER_USER=root
   MAC_ADDRESS=aa:bb:cc:dd:ee:ff
   PORT=8080
   EOL
   

3. Install service:

   sudo cp wol-server.service /etc/systemd/system/
   sudo systemctl daemon-reload
   sudo systemctl enable wol-server
   sudo systemctl start wol-server
   

4. Install required dependencies:

   sudo apt-get update
   sudo apt-get install -y wakeonlan sshpass
   

Configuration

The application can be configured by editing the .env file in the installation directory:

nano ~/wol-server/.env

Available Configuration Options

Setting	Description	Default
SERVER_NAME	Hostname/IP of target server	pippo
SERVER_USER	SSH username for shutdown	root
MAC_ADDRESS	MAC address for Wake-on-LAN	aa:bb:cc:dd:ee:ff
PORT	Web interface port	8080
SHUTDOWN_PASSWORD	Password for all shutdown operations	None
REFRESH_INTERVAL	UI refresh interval in seconds	60

The scheduled backup window configuration is stored in schedule.json in the installation directory. It includes the start time, end time, and frequency settings.

After changing configuration, restart the service:

sudo systemctl restart wol-server

Usage

Accessing the Interface

Open a web browser and navigate to:

http://your-pi-ip:8080

Features

• Status Checking: The interface shows the current status (Online/Offline)
• Booting: Click the "Boot" button to send a WOL magic packet
• Shutting Down: Click "Shutdown" and enter your SSH password when prompted
• Scheduled Backup Window: Configure automatic server startup and shutdown on a regular schedule

Using Scheduled Backup Window

1. Click "Configure Schedule" in the Scheduled Backup Window section
2. Enter your desired start and end times (in 24-hour format)
3. Select a frequency (daily, every 2 days, weekly, or monthly)
4. Optionally, enable "Auto Shutdown" (requires SHUTDOWN_PASSWORD in .env file)
5. Click "Save Schedule" to activate
6. The server will automatically boot at the start time and:
   • If auto shutdown is enabled: automatically shut down at the end time
   • If auto shutdown is disabled: remain on until manually shut down
7. To modify an existing schedule, click "Edit Schedule"
8. To disable, click "Disable Schedule" from the main interface

Note: All shutdown operations (manual and scheduled) use the SHUTDOWN_PASSWORD from your .env file.

Auto Shutdown Feature

The auto shutdown feature provides several advantages:

• Saves power by ensuring the server only runs during scheduled backup periods
• Prevents the server from accidentally remaining on after backups are complete
• Fully automates the backup window process
• Smart protection: only shuts down servers that were started by the scheduler

Requirements for Shutdown Operations:

1. Set the SHUTDOWN_PASSWORD in your .env file
2. The SSH server must be properly configured on the target server
3. The user account specified in the configuration must have sudo privileges
4. The password must be correct for the specified user account
5. The server must allow password authentication via SSH

Troubleshooting Shutdown Operations:

• If shutdown fails, check the logs for specific error messages
• Ensure sshpass is installed on your Raspberry Pi (sudo apt-get install sshpass)
• Verify you can manually SSH to the server with the provided credentials
• Confirm the user has sudo privileges to run the shutdown command
• Check if the server requires SSH key authentication instead of password
• Verify the SHUTDOWN_PASSWORD is correctly set in your .env file

Auto-Refreshing UI

The web interface automatically refreshes every minute (or according to the REFRESH_INTERVAL setting) to show the current server status. This ensures you always see up-to-date information without having to manually refresh the page.

Maintenance

Checking Service Status

sudo systemctl status wol-server

Viewing Logs

sudo journalctl -u wol-server -f

Updating

To update to a newer version:

1. Download and transfer the latest release
2. Stop the service:

   sudo systemctl stop wol-server
   

3. Extract the new files:

   tar -xzf wol-server.tar.gz
   

4. Run the install script:

   ./install.sh
   

Troubleshooting

Service Won't Start

Check for template errors:

ls -la ~/wol-server/templates/

Verify the .env file exists:

cat ~/wol-server/.env

Boot Command Not Working

1. Ensure wakeonlan is installed:

   which wakeonlan || sudo apt-get install wakeonlan
   

2. Verify the MAC address is correct in your .env file
3. Make sure the target device is properly configured for Wake-on-LAN

Shutdown Not Working

1. Verify sshpass is installed:

   which sshpass || sudo apt-get install sshpass
   

2. Check that the SERVER_USER setting in .env is correct
3. Ensure SSH access is working between your Pi and the target server

Advanced Configuration

Running on a Different Port

Edit the .env file:

echo "PORT=8181" >> ~/wol-server/.env

Multiple Target Machines

To control multiple devices, you can install multiple instances:

# Create a second instance
mkdir -p ~/wol-server2/templates
cp -r ~/wol-server/templates/* ~/wol-server2/templates/
cp ~/wol-server/wol-server ~/wol-server2/

# Different config
cat > ~/wol-server2/.env << EOL
SERVER_NAME=server2
SERVER_USER=admin
MAC_ADDRESS=aa:bb:cc:dd:ee:ff
PORT=8081
EOL

# Create a new service
sudo cp /etc/systemd/system/wol-server.service /etc/systemd/system/wol-server2.service
sudo sed -i 's|/home/pi/wol-server|/home/pi/wol-server2|g' /etc/systemd/system/wol-server2.service
sudo systemctl daemon-reload
sudo systemctl enable wol-server2
sudo systemctl start wol-server2

Project Information

Designed for use with Raspberry Pi to provide a simple way to manage servers and devices on your local network. The web interface makes it easy to power on and off machines without having to remember MAC addresses or commands.

Contributing

Contributions are welcome! Feel free to submit pull requests or open issues to help improve this project.

License

This project is licensed under the MIT License - see the LICENSE file for details.