Really nice to see the intention behind a "conference badge" that's designed to be re-used and interesting to hear the considerations around espressif's antenna requirements.
Source: https://media.ccc.de/v/emf2026-70-1-design-decisions-behind-the-tildagon-a-technical-walkthrough
I'm surprised they considered using the USB-C ports as the 'lanyard connector' which is both a good and bad idea, in my experience USB-C does not latch properly, and this badge is not light!
You can read more about the badge here: https://tildagon.badge.emfcamp.org/