Broader Frontends
Author : Kazuhiro Hara
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I Will Exhibit an Even G1 and Marp Integration Demo at LODGE XR Talk Vol.30

Hello World on Even G1

The mechanism I have been steadily building lately, which connects Even G1 and a browser over Web Bluetooth, is now connecting successfully, and I was able to make a prototype. I am grateful to have been given an opportunity to exhibit it at XR Trend Watch & Hands-on Session! LODGE XR Talk Vol.30, which will be held on August 21, so I decided to run a hands-on demo for participants.

This prototype connects Even G1 and Marp (a tool for creating slides with Markdown) over Web Bluetooth and displays cue cards in the air. It may be easiest to imagine presenter notes floating in the air.

Can You Speak While Looking at Your Audience?

Speaking while looking at your audience is actually quite difficult. If you can memorize everything before giving a presentation, or if you simply have enough nerve, you may be able to face the audience while speaking. Even so, after doing a fair amount of public speaking, I have felt how hard it can be.

Even the simple technique of occasionally looking toward the audience improves a presentation, but it is easy to want to check what you will say next and end up speaking while looking at the PC in front of you. Presenter notes certainly remove the anxiety of not knowing what to say.

Ideally, the thing you are about to say would just float in the air. If that were the case, you could speak while reading that text, making it less likely that you would talk while looking at your PC.

That is why the need grows for a tool that connects Even G1 and Marp over Web Bluetooth and displays cue cards in the air. If I could ask for more, maybe this would be unnecessary if Apple made stylish AR glasses that worked with Keynote, were lightweight, and had enough battery to last all day. But as of 2025, nothing like that exists anywhere.

The reason I decided to build it myself for Even G1 was this entry I posted before.

At that time, I had to operate Even G1 manually, and because I was not used to it, it did not go very well. Still, I realized that using smart glasses makes it easier to speak while facing forward. At the same time, I thought smart-glasses support for presentations might have enormous potential.

To be honest, what I will exhibit this time is still quite rough and only at the prototype level. Personally, though, I feel a lot of potential in it. I eventually want to make it OSS, and I hope to get various kinds of feedback at this hands-on session. It is coming up soon, but please come visit LODGE on August 21.

The Road to Development

I will also paste in my trial-and-error log. First, it took a while just to arrive at the idea that Web Bluetooth should work, and I also tried various official samples. The road to displaying Hello World was surprisingly long.

AREvenEventWeb Bluetooth

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