Glossary¶

Hover over terms in the docs to see short definitions. This page lists all acronyms, file types, and product names used in the documentation.

Acronyms & abbreviations¶

Term	Definition
A2DP	Advanced Audio Distribution Profile — Bluetooth stereo audio streaming protocol.
ADC	Analog-to-Digital Converter — converts the slider's voltage to a number (e.g. 0–4095).
API	Application Programming Interface — how code talks to a library or service.
BLE	Bluetooth Low Energy — used for wireless features on the device.
CI	Continuous Integration — automated builds (e.g. GitHub Actions compiling WASM).
CMake	Cross-platform build system used to configure the WASM/Emscripten build.
CORS	Cross-Origin Resource Sharing — browser rules that block loading WASM from `file://` URLs.
CSS	Cascading Style Sheets — used to style the emulator (LEDs, layout).
DOM	Document Object Model — the browser's representation of the page (buttons, canvas).
ESP32	Espressif's 32-bit microcontroller — the main chip on Cyber Fidget hardware.
FPS	Frames Per Second — the emulator runs at 50 FPS like the real device.
FreeRTOS	Free Real-Time Operating System — the RTOS layer used by ESP-IDF under the hood.
GPIO	General-Purpose Input/Output — physical pins used for buttons, etc.
HAL	Hardware Abstraction Layer — the layer that swaps ESP32 drivers for browser equivalents in the emulator.
I2C	Inter-Integrated Circuit — serial bus used for the OLED, accelerometer, and fuel gauge.
I2S	Inter-IC Sound — digital audio bus used for the speaker amplifier and MEMS microphone.
IDE	Integrated Development Environment — e.g. the App Builder on the website.
IndexedDB	Browser storage used to cache compiled WASM so you don't recompile every time.
JS	JavaScript.
LED	Light-Emitting Diode.
LiPo	Lithium Polymer — rechargeable battery type used in Cyber Fidget (400 mAh).
MEMS	Micro-Electro-Mechanical Systems — miniaturized sensor technology used in the ICS-43434 microphone.
NeoPixel	Adafruit's addressable RGB(W) LED product line; firmware uses a shim that matches its API.
OLED	Organic Light-Emitting Diode — the 128×64 pixel display on Cyber Fidget.
OTA	Over-The-Air — firmware updates delivered wirelessly.
PCB	Printed Circuit Board.
RGBW	Red, Green, Blue, White — four-channel LED color.
SD	Secure Digital — the micro-SD card slot.
SPI	Serial Peripheral Interface — serial bus used for the SD card.
SPP	Serial Port Profile — Bluetooth serial data streaming protocol.
SSD1306	The display controller chip used in the Cyber Fidget OLED.
USB	Universal Serial Bus — used for charging and serial communication via USB-C.
WASM	WebAssembly — binary format that runs in the browser; the emulator runs C++ apps as WASM.
WebAssembly	Binary instruction format for the web; the emulator compiles C++ to WASM.
Wi-Fi	Wireless Fidelity — used for OTA and network features.

File types & artifacts¶

Term	Meaning
.cpp	C++ source file (implementation).
.h	C/C++ header file (declarations).
.js	JavaScript file — the Emscripten "loader" that loads and runs the WASM module.
.wasm	WebAssembly binary — the compiled app.
.yml / .yaml	YAML config — e.g. GitHub Actions workflow or MkDocs config.

Products & projects¶

Term	Meaning
Adafruit	Maker electronics company; NeoPixel and many Arduino libraries.
AP2112K	Diodes Inc. 3.3V LDO regulator — used for main logic, OLED, and LED power rails.
CircuitPython	Adafruit's Python runtime for microcontrollers. Hardware support designed-in but currently untested on Cyber Fidget.
CP2102N	Silicon Labs USB-to-UART bridge chip — provides the serial connection over USB-C.
Cyber Fidget	The physical device and ecosystem (hardware, firmware, website, docs).
Emscripten	Toolchain that compiles C/C++ to WebAssembly and JavaScript.
GitHub Actions	CI/CD platform used to compile WASM on your fork.
ICS-43434	InvenSense/TDK I2S MEMS microphone used in Cyber Fidget.
LIS2DH12	STMicroelectronics 3-axis digital accelerometer used in Cyber Fidget.
MAX17048	Analog Devices/Maxim fuel gauge IC for LiPo battery state-of-charge monitoring.
MAX98357A	Analog Devices/Maxim I2S Class-D amplifier driving the on-board speaker.
MCP73831	Microchip single-cell LiPo charge management controller.
pioarduino	Community-maintained PlatformIO platform fork for ESP32 (ESP-IDF 5.1.4 + Arduino ESP32 3.0.3).
PlatformIO	IDE and build system for embedded development; recommended for Cyber Fidget via the pioarduino fork.
SK6812	Individually addressable RGBW LED (NeoPixel-compatible) — four are used in Cyber Fidget.
ThingPulse	Source of the OLED font data used in the WASM shim.

Emulator-specific¶

Term	Meaning
Bridge	`wasm_bridge.js` — glue between the WASM module and the on-screen emulator.
Shim	A stub header (e.g. `Arduino.h`, `SSD1306Wire.h`) that replaces real hardware libraries so the same app code compiles for the browser.
Serial Monitor	The panel in the App Builder that shows `Serial.println()` output from the running app.