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designer technical writeup

Building the ChCon Badge 2025

Jeremy Stott's post-event technical writeup documenting the ESP32-C3 platform, 24 WS2812 LEDs, SSD1306 OLED, bare-metal Rust/Embassy architecture, stack-based pattern VM, USB Serial JTAG shell, WebSocket implementation, and Minecraft 1.21.4 server.

Badge: CHCon 2025 Badge

development log

LayerOne 2016 All at once log

Project log source for PCB arrival, Eagle design, reverse-protection diode, level-shifter debugging, daisy-chain tests, ESP8266 power/noise fixes, Wi-Fi control, planned firmware-update station, and pre-build intent.

Badge: LayerOne 2016 Conference Badge

development log

LayerOne 2017 goals log

Project log source for feature status around CAN, USB, audio, battery, buttons, J2534 work, ST-Link programming, ECU reflashing, CAN logger behavior, and memory access over CAN.

Badge: LayerOne 2017 CAN Bus Badge

event archive

Zer0Con 2025 archive

Official Zer0Con source for April 10-11, 2025 dates, Fairmont Ambassador Hotel Seoul venue, closed-conference framing, speakers, training, and archives.

Badge: Zer0Con 2025 Entry Badge