HackerHotel 2024 Telegraph Badge
An interactive Victorian-telegraph-themed puzzle badge inspired by the Cooke and Wheatstone telegraph.
Badge.Team Adjacent Events
HackerHotel 2024
The Telegraph badge, an ESP32-C6 e-paper puzzle badge with telegraph-inspired switches, LED matrix input, Qwiic, SAO, and case files.
Garderen · Netherlands · 2024
Lifecycle
Add-ons & Upgrades
HackerHotel 2024 Telegraph Badge
historical
802.15.4 mesh Battleships
Hackaday describes a Battleships game played with another badge over the ESP32-C6's 802.15.4 mesh networking.
HackerHotel 2024 Telegraph Badge
historical
SAO, Qwiic, case, and firmware repositories
The Telegraph badge documentation links SAO designs, Qwiic expansion, ESP32-C6 firmware, CH32V003 co-processor firmware, hardware files, and a 3D printable case.
HackerHotel 2024 Telegraph Badge
historical
Clicky relay telegraph feedback
The field report calls out an onboard relay whose practical purpose was tactile clicking, reinforcing the telegraph feel of the five-switch interface.
Operational history
Issues & Camp Impact
The Hackaday report is useful for attendee-facing behavior and lore, but detailed component claims should still be checked against the official Badge.Team hardware repositories and schematics.
The dossier can use the report for mesh gameplay and relay-interface lore while keeping low-level hardware claims anchored to primary sources.
Badge.Team publishes useful official HackerHotel 2024 badge photos, but this pass did not find an explicit reusable content license for those documentation photos; the catalogue therefore withholds the image until reuse rights are cleared.
The image replacement queue can point contributors at the right source page without importing an all-rights-reserved-looking photo into the public archive.
Resources
Hackaday HackerHotel 2024 badge field report
field report · Hackaday writeup covering the telegraph interface, ESP32-C6/CH32V003 split, salvaged e-paper screen, click relay, mesh messaging, and Battleships app.
HackerHotel 2024 docs
official docs · Badge.Team page documenting the Telegraph badge hardware, app navigation, resources, case, and bug-reporting path.
HackerHotel 2024 badge photos
official photos · Badge.Team photos page with badge images, billboard message-printer context, and preparation/flashing/testing photos.
Sources
Badge.Team: HackerHotel 2024 docs
Retrieved 2026-05-15 · Badge.Team page documenting the Telegraph badge hardware, app navigation, resources, case, and bug-reporting path.
Badge.Team: Hackerhotel 2024 photos
Retrieved 2026-05-15 · Primary photo/context source for the badge, billboard printer, and Bitlair preparation.
Hackaday: A Telegraph Interface For The Hacker Hotel 2024 Badge
Retrieved 2026-05-15 · Secondary field report for the badge's telegraph interface, mesh messaging, Battleships app, clicky relay, and reuse as a name badge.