Compose & publish
Preview and send through the Rust web surface, JSON API, command-line client, or a generated SDK.
DISPLAY SYSTEM / LDY-01
From message
to matrix,
one connected system.
Publish from web, API, or CLI. Stream commands and telemetry over WebSockets. Render deterministic scrolling text on Arduino, ESP32-S3, STM32F4, or Raspberry Pi.
HELLO ↗
01PUBLISHweb · API · CLI
02COMMANDWebSocket
03RENDERframebuffer
INPUTMessage + display policy
→CONTROL PLANEDesired state + telemetry
→DEVICEDeterministic pixels
THE SYSTEM
Every layer has a contract.
Compose, deliver, and render messages without burying device behavior inside the control plane.
HTTP
Command & observe
The WebSocket command plane carries desired display state and receives device telemetry.
Render predictably
A shared Rust framebuffer, 5×7 font, layout engine, and serpentine addressing turn state into physical pixels.
Recover current state
Reconnecting devices receive the latest desired state without duplicate replay.
DEVICE RANGE
Small ticker.
Long wall.
Same message model.
Board dimensions are configuration, not a product fork. The software targets compact five-row tickers through installations hundreds of pixels wide; physical readiness remains tied to repository-specific smoke-test evidence.
100 × 5recommended working range300 × 20
CONTROLLERS / TRANSPORTSSOFTWARE TARGETS
- Arduino / ESP32Wi-Fi · serial adapterssoftware
- ESP32-S3connected matrix firmwaresoftware
- STM32F4embedded display targetsoftware
- Raspberry PiRust agent · hardware adapterssoftware
- Virtual devicesoftware-only E2E certificationtest
PORTABLE CONTRACTS
OpenAPI, AsyncAPI, and JSON Schema keep the fleet legible.
Official clients span native, browser, edge, BEAM, JVM, mobile, and scripting runtimes. The same typed display and telemetry model reaches each surface.
C / C++ / ZigRust / WASMTypeScriptGoDart / SwiftJava / KotlinErlang / Elixir / GleamPython / Ruby / PHP
REPOSITORY MAP
Follow one message through the stack.
Each repository owns a bounded layer. The monorepo coordinates versions and the end-to-end project certifies the whole route.