CH23
Listed in the HackerHotel 2024 team section.
SourceHackerHotel 2024 · Netherlands · 2024
HackerHotel 2024 Telegraph Badge
ESP32-C6 e-paper telegraph puzzle badge
An interactive Victorian-telegraph-themed puzzle badge inspired by the Cooke and Wheatstone telegraph.
EventHackerHotel 2024
SeriesBadge.Team Adjacent Events
LocationGarderen
CountryNetherlands
People
Authors & Credits
Dimitri
Listed in the HackerHotel 2024 team section.
SourceGuru-san
Listed in the HackerHotel 2024 team section.
SourceJulian
Listed in the HackerHotel 2024 team section.
SourceMartijn
Listed in the HackerHotel 2024 team section.
SourceNikolett
Listed in the HackerHotel 2024 team section.
SourceNorbert
Listed in the HackerHotel 2024 team section.
SourceRenze
Listed in the HackerHotel 2024 team section.
SourceSqyD
Listed in the HackerHotel 2024 team section.
SourceTom Clement
Listed in the HackerHotel 2024 team section.
SourceYvo
Listed in the HackerHotel 2024 team section.
SourceZac
Listed in the HackerHotel 2024 team section.
SourceWhy It Mattered
It demonstrates the modern Badge.Team stack extending to ESP32-C6, e-paper UX, unusual physical input, mesh-capable radios, and published hardware/firmware/case resources.
Hardware
ESP32-C6 with WiFi 6, BLE and 802.15.4, 296x128 red/black e-paper display, five three-way switches, LED matrix telegraph interface, SAO, Qwiic, status LED, USB-C charging, and printable case.
Software & Apps
Map-style app/game navigation, engine-room settings, ESP32-C6 firmware, CH32V003 co-processor firmware, and image-display examples are documented.
Lore
The five switches become telegraph needles; when two needles point at the same letter, the input is registered.
Lifecycle
Add-ons & Upgrades
badge-to-badge game
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.
Source
hardware/software expansion
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.
Source
physical interface feature
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.
SourceOperational history
Issues & Camp Impact
field-report scope caveat
note
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.
- Confidence
- official docs plus secondary field report
- Status
- needs schematic-level review
- Timeframe
- post-event archive
- Source note
- Hackaday field report and Badge.Team HackerHotel 2024 docs.
missing rights-cleared image
note
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.
- Confidence
- official photo page and project image policy
- Status
- needs permission or explicit license
- Timeframe
- current catalogue build
- Source note
- Badge.Team HackerHotel 2024 photos page and badge.gallery image policy.
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 badge photos
official photos · Badge.Team photos page with badge images, billboard message-printer context, and preparation/flashing/testing photos.
HackerHotel 2024 docs
official docs · Badge.Team page documenting the Telegraph badge hardware, app navigation, resources, case, and bug-reporting path.
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.