Hello and welcome to the reverse engineering guide of the CactusCon 12 (2024) badge. The badge uses an ESP32-S3-WROOM-1 chip. The data sheet can be found here: espressif.com/sites/default/files/documentation/esp32-s3-wroom-1_wroom-1u_datasheet_en.pdf The chip is programmable through either ESP-IDF or PlatformIO in Visual Studio Code. Presented here are the steps in the order they were revealed/figured out. Note: These are the steps that I executed on a Mac. Some adjustment may be necessary for *nix and Windows.