Researchers at the Disney Research Center and researchers at the Swiss Federal Institute of Technology in Zurich have invented a visible light communication (VLC) network technology that enables LED bulbs to communicate in a way that is compatible with network networking protocols. Researchers say this advancement will drive VLC to play an important role in the Internet of Things (IoT).
Stefan Mangold, head of the research team, said: "Optical communication can make the real Internet of Things a consumer device with LED lights, rather than wireless communication lines being transformed into interactive communication nodes. We are researching not only sensors, smartphones And appliances, including toys with built-in LED lights, created an Internet of Toys that can remotely access, monitor and manipulate these toys."
To achieve their prototype, the researchers used commercial off-the-shelf LED bulbs to modify and transmit and receive visible light signals. These improvements include the Atheros AR9331 SoC (running the embedded OpenWrt Linux operating system), the VLC controller module, and an additional 3.3 V power supply for the SoC and controller.
The controller is like an Ethernet interface and is compatible with Internet protocols such as TCP and UDP. The system is capable of creating networks with communication speeds of up to 1 kbit/s.
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