Issue dossier

The writeup notes BLE battery drain, swapped VCC/GND pins on final OLED displays, and a warning that 12 V serial adapters can fry the badge.

A linkable camp-impact record with badge context, severity, evidence confidence, and source notes.

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power and programming caveat · primary writeup · documented

The record documents practical handling and programming risks rather than presenting the badge as a frictionless reference design.

Badge
H2HC 2018 Badge
Category
power and programming caveat
Severity
note
Confidence
primary writeup
Status
documented
Timeframe
H2HC 2018 badge use
Source note
Security-Bits H2HC 2018 badge writeup.

Evidence

Related Resources

project page

H2HC 2018 badge writeup

Security-Bits writeup documenting bottle-shaped ESP32 badge hardware, OLED, BLE behavior, LEDs, programming, power, and practical warnings.

Badge: H2HC 2018 Badge

Source trail

Evidence Sources

Security-Bits.de · retrieved 2026-05-15

H2HC 2018 Badge

Primary writeup source for ESP32 WROOM, OLED display, BLE behavior, LEDs, power, Arduino workflow, and programming warnings.

Badge: H2HC 2018 Badge