Building Festival Badges That Sync Themselves Up
Tony Goacher has developed innovative festival badges that can automatically sync with each other during performances. These badges utilize an ESP32 microcontroller and the ESP-NOW wireless communication protocol to broadcast and receive clock ticks. This allows multiple badges to synchronize their LED sequences without the need for a master device.
- ▪The badges feature a ring of 16 addressable RGB LEDs.
- ▪They use an ESP32 microcontroller with built-in wireless capabilities.
- ▪The ESP-NOW protocol enables badges to sync their clock ticks automatically.
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| Original publisher | Hackaday |
| Canonical URL | https://hackaday.com/2026/05/20/building-festival-badges-that-sync-themselves-up/ |
| Publication time | Wed, 20 May 2026 23:00:32 +0000 |
| Retrieval time | 2026-05-20T23:05:03.117Z |
| Last seen | 2026-05-20T23:05:03.117Z |
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Basis: Derived from the published RSS/Atom feed. Contact: [email protected]. Reviewed: 2026-07-24.
Opening excerpt (first ~120 words) tap to expand
Building Festival Badges That Sync Themselves Up No comments by: Zoe Skyforest May 20, 2026 Title: Copy Short Link: Copy Lots of music events these days hand out various glowing tchotchkes that flash and sync up with the performance. [Tony Goacher] has whipped up his own badges that can do just that, all without needing any sort of pairing or infrastructure to speak of. The CrowdClock badges each feature a ring of 16 addressable RGB LEDs. Running the LEDs is an ESP32 microcontroller, which has lots of neat wireless capability baked in from the factory. [Tony] decided to leverage the ESP-NOW wireless communication protocol to enable each badge to broadcast its current local clock tick.
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Excerpt limited to ~120 words for fair-use compliance. The full article is at Hackaday.
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