91 lines
4.0 KiB
HTML
91 lines
4.0 KiB
HTML
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<section>
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<blockquote>
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<p>DATE: Thu 19 Dec 2024 18:35 By: konsthol@pm.me</p>
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</blockquote>
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<h1 id="the-magic-of-wake-on-lan">The magic of Wake-On-LAN</h1>
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<p>Years ago, some good friends of mine gifted me a Raspberry Pi 4 with
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2GB of RAM for my birthday. It’s hands down the most thoughtful gift
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I’ve ever received, perfectly matching my hobbies. They were lucky to
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even find one during the chip shortage! I initially used it as a VPN
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server with WireGuard and played around with Pi-hole for network-wide ad
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blocking.</p>
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<p>Eventually, I got into cloud computing and started hosting multiple
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services on a VPS I rent from MVPS. This VPS, with its 4GB of RAM,
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currently runs several of my daily-use services like Gitea, Searx, NTFY,
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and more. Although the Raspberry Pi could theoretically handle these
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services, its 2GB of RAM limited simultaneous operations.</p>
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<p>One day, it hit me: why not use the Raspberry Pi for a simpler
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project like a Wake-On-LAN (WOL) server? It requires minimal resources
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and just needs to stay on and send WOL packets. The Raspberry Pi is
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connected via Wi-Fi to the same network as my laptop. Normally, waking
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up my laptop with WOL would require an Ethernet cable connection to the
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router, but I connected one end to the Pi and the other to the
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laptop.</p>
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<p>I started with a simple shell script using etherwake, a command-line
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tool to send WOL packets. After enabling WOL in my laptop’s BIOS and
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confirming it on the OS using ethtool, I could easily wake my laptop
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remotely using a Termux shortcut on my phone, which SSHed into the
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Raspberry Pi to execute the etherwake command.</p>
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<p>Though this setup worked perfectly fine, I wanted to make it even
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better. Initially, the Raspberry Pi only ran SSH and executed a command
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to wake my laptop. So it wasn’t really a WOL server. After some
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research, I found Flask and created an actual WOL server. This server
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had routes, authentication, logging, rate limits, and more to ensure
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robustness and security.</p>
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<p>What makes my Flask-based server so cool is its dynamic nature. I can
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configure a .env file with multiple device MAC addresses, allowing
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numerous routes for different devices. For instance, I have
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LAPTOP_MAC=“itsmac” and DESKTOP_MAC=“itsmac”, enabling me to wake them
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via HTTP requests at /wol/laptop and /wol/desktop, respectively.</p>
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<p>One open-source application that fits my use case is HTTP Shortcuts
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from F-Droid. After configuring a specific route, I can turn it into a
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widget on my home screen. This way, I can wake my laptop up with just a
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tap! Plus, I use dynamic DNS, so my Pi is accessible from anywhere.</p>
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<p><img
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src="/images/pic-selected-19-12-24_19-10-42.png">The project’s
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mascot</a><br /></p>
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<p>I would suggest anyone to take a look at my project’s repo and if
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they find that it fits their needs, use the setupSingleBinary.sh script
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to grab the latest executable. The repo is over at</p>
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<p><a
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href="https://git.konsthol.eu/konsthol/WOL-Ly">WOL-Ly</a><br /></p>
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<p><a href="..">..</a></p>
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<footer>
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</html>
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