HIOS
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HIOS · Workbench

Local tools for validating, generating, and testing.

A clear workbench for payloads, audio, networking, and technical debugging. Runs in the browser with speed and privacy in mind.

Open Workbench View hardware projects
  • Local-first
  • Open source
  • Built for real work
Tool spotlight
Signal GeneratorTones, white/pink/brown noise, sweeps and L/R tests for speakers, DACs and audio chains.
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Projects

Things that work. Mistakes I made. Everything documented.
BTDAC

BTDAC

Works
"When it finally sounded, I screamed at 2am."
Bluetooth audio receiver con DAC PCM5102 y ESP32. Funciona. Suena bien. Tardé 3 semanas.
3 tutorials12 files
What I learned
I2S audioFuente partidaESP32 Bluetooth A2DP
HIOS PAD

HIOS PAD

Works
"Physical layers for everything I do. No drivers, no cables."
Macropad ESP32-S3 con pantalla, encoder y joystick: teclado/mouse/multimedia HID por USB, BLE y WiFi (auto-switch), con capas por contexto navegables desde la pantalla. Flasheo OTA y feedback real de la PC vía un daemon companion local-first.
What I learned
HID multi-transporte (USB + BLE)OTA wirelessCompanion local-firstFreeRTOS dual-coreNimBLE / TinyUSBUI con TFT_eSprite
WiFi Speaker

WiFi Speaker

WIP
"WiFi + I2S = wireless audio, zero noise."
Parlante WiFi con ESP32, amplificador I2S MAX98357 y control via web.
5 tutorials8 files
What I learned
I2S audioWiFi streamingWeb server ESP32

The tools

47 tools · Everything runs in your browser. Pick one, or roll the dice.

Open a random one
Signal GeneratorTones, white/pink/brown noise, sweeps and L/R tests for speakers, DACs and audio chains.Local onlyOpen toolInstrument TunerMulti-instrument tuner (guitar, bass, ukulele, strings) with adjustable A4 and a clickable string diagram.Local onlyOpen toolSpectrum AnalyzerRealtime microphone FFT to inspect frequency energy from the browser.Local onlyOpen toolLevel MeterRelative microphone meter for comparing loudness, noise floor and signal peaks.Local onlyOpen toolMetronomeConfigurable musical click with tempo, beats and subdivisions for practice or timing tests.Local onlyOpen toolBeat CounterEstimate BPM by tapping the pulse with clicks or the spacebar.Local onlyOpen toolDelay CalculatorConvert BPM to musical delay times and milliseconds to acoustic distance.Local onlyOpen toolPayload LabFormat, validate, and share JSON payloads without leaving the browser.Local onlyOpen tool
See all (47) →
Calculators
Resistors, I2S, RC and more — in the browser.
Pinouts
Interactive module pinout viewer.
Maker
My 3D models and community picks.
Devlog
Technical notes on what I build.