Country dossier
Worldwide badge coverage for Brazil, grouped into seeded badges, event editions, add-ons, operational issues, resources, and evidence sources.
Seeded artifacts
LPC1343 ARM development badge
An open-source H2HC 2013 badge for the 10th Hackers to Hackers Conference in Brazil, built as a USB-enabled ARM Cortex-M3 development board based on the LPC1343 and intended as an experimental next-generation GoodFET platform.
ATTiny85 USB HID injector badge
A small H2HC 2017 badge built around an ATTiny85 USB-stick module for USB HID keyboard-injector experiments, Micronucleus bootloader flashing, and Arduino IDE workshop-style payload development.
Bottle-shaped ESP32 BLE and OLED badge
A small-batch H2HC 2018 bottle-shaped PCB badge with an ESP32 WROOM, I2C OLED display, six controllable LEDs, BLE behavior, AAA or USB power, and Arduino IDE source-code notes.
Wooden-PCB NE555 wrapped-wire badge
A deliberately old-school H2HC 2022 badge built as a wooden PCB with large components, wrapped wire, an NE555 clock signal, and blinking LEDs.
Custom Game Boy conference game artifact
A custom H2HC 2023 Game Boy game badge/artifact distributed as a conference-themed game cartridge experience rather than a PCB electronics badge.
Custom CR80 Hacker ID identity artifact
The first-edition H2HC 2024 Hacker ID Card, a custom CR80-size identity-card badge/artifact produced with a dedicated card-printing workflow.
Garoa ESP8266/OLED community electronic badge
Garoa Hacker Clube's own event-period demo repository identifies its REV. 0 board as a badge distributed at BSides SP 2026. The Garoa and official V21 event sources establish the completed São Paulo conference, while the public source trail documents an ESP8266 badge with a 128×64 OLED, buttons, sound/IR path, microSD socket, FTDI programming header, and public KiCad/Gerber/BOM material. It does not prove one final firmware or hardware revision for every conference unit.
Events
The 10th Hackers to Hackers Conference in Brazil, represented by an open-source LPC1343 ARM development badge documented by Great Scott Gadgets.
A Brazilian H2HC edition represented by a small ATTiny85 USB HID injector badge based on the Wattuino Nanite 85 and documented by Security-Bits.
A Brazilian H2HC edition represented by a bottle-shaped ESP32 badge with OLED display, BLE behavior, six LEDs, and Arduino-based code documentation.
A Brazilian H2HC edition represented by a wooden-PCB badge with wrapped wire, an NE555 clock circuit, and blinking LEDs.
A Brazilian H2HC edition represented by a custom Game Boy game badge/artifact that depicts a virtual visit to the conference, venue, hotel, and Brazil.
A Brazilian H2HC edition represented by the first edition of the Hacker ID Card and custom CR80 card-printing identity-artifact project.
The completed May 16-17, 2026 Security BSides SP V21 edition in São Paulo. Garoa Hacker Clube's public event, REV. 0 hardware, and demo sources associate an ESP8266 Garoa badge with this conference while leaving the exact 2026 firmware, allocation, and final hardware-revision mapping unresolved.
Lifecycle
The badge used a wooden board, large components, wrapped wire, an NE555 clock signal, and a few cycling LEDs.
The source describes flashing about 120 cartridges for the H2HC 2023 Game Boy badge/game artifact.
Garoa’s event-period demo archive is a MicroPython, one-app-per-flash collection associated with BSides SP 2026 and explicitly labeled alpha/experimental. It is recorded as an archival software surface rather than a verified on-badge deployment.
The writeup describes BLE write handling that switches LEDs and shows text messages across badge display pages.
Attendees could use the LPC1343 USB mass-storage bootloader by replacing firmware.bin, or invoke it through the ISP and reset-button sequence.
The writeup documents Micronucleus flashing, Arduino IDE 1.6.x setup, Digistump board support, DigiKeyboard payload examples, and operating-system keyboard-layout caveats.
The game includes custom assets, music, maps, and hidden interactions rather than firmware for a microcontroller badge.
The badge used a Watterott Wattuino Nanite 85 / ATTiny85 USB-stick style board to act as a programmable USB keyboard injector.
Garoa’s REV. 0 documentation identifies an ESP8266, a 128×64 OLED, three GPIO buttons plus Reset, and a buzzer/IR path. It does not establish a complete final component population for every 2026 unit.
The badge was based on the experimental gflpc1343 GreatFET design and exposed a TARGET header intended for future GoodFET-compatible use.
The commit-pinned Garoa hardware tree preserves KiCad, BOM, and Gerber material for the platform. Its cross-year source history does not map a particular tree state to every distributed 2026 board.
The H2HC 2024 artifact is documented as the first edition of the Hacker ID Card, a CR80-size personalized card project.
Documented display tabs include main H2HC 2018, dev status, last BLE message, raw debug text, and name pages.
The artifact consisted of a white baseplate PCB and a separate USB-stick badge board, with soldering-pad access for serial-adapter bootloader repair.
The H2HC card-printing posts document CR80 85.6 x 53.98 mm card sizing, a DASCOM DC-7600 600 DPI full-duplex re-transfer printer, front/back artwork preparation, on-site pickup workflow, and optional UV-ribbon capability rather than electronic badge firmware.
The badge artifact was implemented as a custom GB Studio game that guides players through a virtual Sao Paulo, hotel, conference, and Brazil-themed environment.
The REV. 0 documentation identifies a microSD socket and FTDI programming socket as physical interfaces. The catalogue records their presence without asserting media contents, production wiring, service policy, safety, or support outcomes.
Operational history
The record does not turn the documented REV. 0 platform into a claim that every 2026 badge had the same corrected board, components, physical build, or event-ready firmware.
The record treats the badge as a teaching artifact for keystroke injection and preserves operational risks instead of presenting it as a harmless novelty.
The entry is classified as a playable event artifact rather than upgraded into unsupported electronic-badge claims.
The catalogue records the source-backed event association without implying that every attendee received an identical unit or that the current demo archive was installed on conference hardware.
The catalogue links to the technical source as evidence while withholding local copies of repository imagery, CAD, and source material until a clear reuse basis is identified.
The entry is modeled as an identity-card badge artifact and avoids unsupported electronics claims.
This preserves a real development caveat for people trying to reproduce the badge workflow.
The record stays source-backed and image-free rather than copying blog photos or generating an approximate ID card.
The record remains source-backed and image-free rather than copying event graphics, Garoa wiki media, repository previews, screenshots, social images, or generated approximations.
The badge remains image-free until an original licensed photo or explicit permission is available.
The record stays source-backed and image-free rather than copying blog photos or using generated cartridge art.
The entry stays source-linked and image-free rather than copying project-page media without a recorded image license.
The catalogue does not copy the writeup photos until image provenance can be represented properly.
The record stays source-backed and image-free rather than copying blog images or using generated badge art.
The record documents practical handling and programming risks rather than presenting the badge as a frictionless reference design.