Generating Server-Sent Events on Arduino

This is a tiny demonstration I created for MESO Digital Services. We’re using an Arduino Ethernet to intercept inputs and forward them to a browser. One-Way communication makes Server-Sent Events via Eventsource an interesting and rarely seen choice.

Here’s a video of the proof of concept with two switches on digital inputs. Analog input (or complex input like MIDI or DMX) works, too. The latency is negligible – the video was shot at 25 frames per second, and i can’t even tell if there’s one frame of delay. It’s certainly good enough for most use cases, including games.

The Code and some more links are up on GitHub!


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Claudius Coenen is a tech-enthusiast. He's writing on all kinds of topics, including programming, technology, gadgets and media.

This site features his occasional articles, findings, documentations.

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