Add-on dossier

BLE mesh chat protocol

A linkable lifecycle record for hardware expansions, app ecosystems, firmware upgrades, cases, radio parts, and post-event badge experiments.

Back to add-ons index

DEF CON Singapore 2026 TISC ESP32 Trinket first-hand finalist-backed

wireless challenge

The trinket ran a customized mesh chat protocol over BLE, with the challenge requiring reverse engineering to gain access to an administrative system broadcasting over the protocol.

Badge: DEF CON Singapore 2026 TISC ESP32 Trinket
Type: wireless challenge
Status: first-hand finalist-backed
Compatibility: DEF CON Singapore 2026 TISC ESP32 Trinket
Source: https://uzyn.com/2026/tisc-defcon-singapore-2026-finals/

Badge context

Related Resources

event page

DEF CON Singapore 2026 event page

Official DEF CON page anchoring the April 28-30, 2026 Singapore host event; it does not classify the TISC trinket as an official admission badge.

Badge: DEF CON Singapore 2026 TISC ESP32 Trinket

finalist writeup

TISC@DEFCON Singapore 2026 Finals writeup

Finalist report documenting top-50 qualification, six-hour finals format, and the ESP32 BLE mesh challenge trinket handed to each participant.

Badge: DEF CON Singapore 2026 TISC ESP32 Trinket

official village page

C517 Village at DEF CON SG

CSIT official C517 Village page documenting TISC@DEF CON SG as a special-edition Capture The Flag with online qualifiers and on-site finals at DEF CON Singapore.

Badge: DEF CON Singapore 2026 TISC ESP32 Trinket

Source trail

Evidence Sources

CSIT · retrieved 2026-05-15

C517 Village at DEF CON SG

Official C517 Village source for TISC@DEF CON SG, online qualifier and on-site final structure, C517 Village context, and CSIT framing.

Badge: DEF CON Singapore 2026 TISC ESP32 Trinket

DEF CON · retrieved 2026-05-15

DEF CON Singapore

Official host-event source for the April 28-30, 2026 DEF CON Singapore conference at Marina Bay Sands; this source does not identify the TISC trinket as an official admission badge.

Badge: DEF CON Singapore 2026 TISC ESP32 Trinket

U-Zyn Chua · retrieved 2026-05-15

TISC@DEFCON Singapore 2026 Finals

First-hand finalist source for the top-50 finalist group, six-hour five-challenge finals, and ESP32 BLE mesh hardware trinket handed to each participant.

Badge: DEF CON Singapore 2026 TISC ESP32 Trinket