What began as a simple technical curiosity has ended in a milestone: a developer known as Vimpo has managed to host a Minecraft server in a smart light bulb low-cost item purchased on AliExpress.
The heart of the feat is a microcontroller The RISC-V BL602, which operates at 192 MHz and offers only 276 KB of RAM and 128 KB of ROM, is a tiny number that forces us to push optimization to the limit for the experiment to make sense.
From the light socket to the laboratory: this is how the hardware was prepared
The Wi-Fi LED bulb used contained a single-core BL602 chipwith minimal I/O and meager resources; a seemingly hostile environment for any game server.
To work with more control, the author removed the microcontroller from the light bulb and mounted it in a adapter plate with inputs and a small screenThis allowed for a stable connection for flashing, controlling, and monitoring the system.
The next step was to solder wires to the chip pins and connect them to a USB-to-serial adapterWith that interface, he was able to turn the device on and off, and treat it as an embedded "system" ready for network testing, flashing, and debugging.
A tiny server: software and usage figures
The key piece on the software side was Ucraft, a minimalist server written in C which cuts back many of the features of the "vanilla" version to fit extreme memory and storage restrictions.
In numbers: the Ucraft binary takes up 46 KB without authentication and it reaches about 90 KB with authentication libraryIn operation, with 10 players, RAM usage is around 20 KB without authentication and approximately 70 KB with authentication, figures that demonstrate a remarkable optimization engineering.
- Architecture: RISC-V BL602, single core at 192 MHz.
- Memory: 276 KB of RAM and 128 KB of ROM available.
- Connectivity: Minimal I/O and USB-serial link for programming.
- Assembly: microcontroller removed and placed on adapter board.
What it can and cannot do
Although the server is functional, It does not replace a professional deployment.Ucraft omits most advanced features (plugins, world management, and more complex authentication options) to fit the hardware.
The transformed light bulb demonstrates the flexibility of embedded systemsHowever, its capacity is more of a proof of concept than a practical improvement over standard hosting solutions.
Context: From “Can it run Doom?” to “Will Minecraft fit here?”
For years, the popular challenge was to run Doom on any device imaginable; now Minecraft takes over In these demonstrations, and this test adds to other optimization feats, such as the extreme reduction of operating systems (famous cases with the very lightweight Windows 7) or academic and corporate experiments.
These types of projects, which are very popular with the maker community in Spain and EuropeThey serve as a teaching tool for discussing architecture, networks, and C programming, rather than as a commercial channel for daily use.
Trying it at home? Considerations and safety
To replicate it, the essential thing is to have a bulb based on BL602 (not all are suitable), a USB-serial adapter, fine soldering and knowledge of embedded systems; also familiarity with cross-compilation and flashing tools.
Caution: Handling devices connected to 230 V This involves risks; the bulb must be disconnected from the mains, preferably using a laboratory power supply, and complying with current EU electrical safety regulations to avoid damage and void warranties.
Beyond the media impact, this initiative demonstrates that with engineering, feature reduction, and a lot of patienceA Minecraft server can reside in the most unexpected place: the microcontroller of a smart light bulb.