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ChuckandClaude Opus 5.5
14c38a3189
On hdpi the stall watchdog logged a 1.9s stall during the hourly sports refresh that the soak report never had: its worst gap was 655ms. The frame that ended the stall was recorded as static, so its interval was dropped. "Scrolling" is DisplayManager's scroll state at the moment a frame is presented, and it goes missing mid-scroll: it expires after 2s without activity, and any thread can clear it. Plugins call set_scrolling_state(False) from their own display() (news, stocks, the odds ticker's fallback), and Vegas captures some of those on the render thread between two of its own frames. Vegas sets the state again only after its next frame, so that frame is recorded as static -- along with the capture or stall it followed. One static frame between two scrolling frames, with the scroll resuming within RESUME_SECONDS (1s), is now a frame of the scroll and both of its intervals count, the first at the scroll's own hold (clearing the state drops the hold to 1 too). Two static frames in a row still end the scroll. Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
LEDMatrix Documentation
This directory contains guides, references, and architectural notes for the LEDMatrix project. If you are setting up a Pi for the first time, start with the project root README — it covers hardware, OS imaging, and the one-shot installer. The pages here go deeper.
I'm a new user
- GETTING_STARTED.md — first-time setup walkthrough
- WEB_INTERFACE_GUIDE.md — using the web UI
- PLUGIN_STORE_GUIDE.md — installing and managing plugins
- WIFI_NETWORK_SETUP.md — WiFi and AP-mode setup
- TROUBLESHOOTING.md — common issues and fixes
- SSH_UNAVAILABLE_AFTER_INSTALL.md — recovering SSH after install
- CONFIG_DEBUGGING.md — diagnosing config problems
- LOW_MEMORY_BOARDS.md — Pi Zero 2 W / 3B+ / 1GB Pi 4 memory limits
I want to write a plugin
Start here:
- PLUGIN_DEVELOPMENT_GUIDE.md — end-to-end workflow
- PLUGIN_QUICK_REFERENCE.md — cheat sheet
- PLUGIN_API_REFERENCE.md — display, cache, and plugin-manager APIs
- PLUGIN_ERROR_HANDLING.md — error-handling patterns
- DEV_PREVIEW.md — preview plugins on your dev machine without a Pi
- EMULATOR_SETUP_GUIDE.md — running the matrix emulator
Going deeper:
- ADVANCED_PLUGIN_DEVELOPMENT.md — advanced patterns
- PLUGIN_ARCHITECTURE_SPEC.md — original plugin-system design spec (historical; see its banner for what has drifted)
- PLUGIN_DEPENDENCY_GUIDE.md / PLUGIN_DEPENDENCY_TROUBLESHOOTING.md
- PLUGIN_WEB_UI_ACTIONS.md (+ example JSON)
- PLUGIN_CUSTOM_ICONS.md
- PLUGIN_REGISTRY_SETUP_GUIDE.md (+ registry template)
- STARLARK_APPS_GUIDE.md — Starlark-based mini-apps
- widget-guide.md — widget development
- ADAPTIVE_LAYOUT.md — render legibly on any panel size (opt-in font/layout scaling)
- plugin-safety-harness.md — test a plugin across every screen and matrix size
Configuring plugins
- PLUGIN_CONFIG_QUICK_START.md — minimal config you need
- PLUGIN_CONFIGURATION_GUIDE.md — schema design
- PLUGIN_ELEMENT_STYLING.md — let users restyle, move, hide and scale individual elements (per display mode, if you have them)
- PLUGIN_CONFIGURATION_TABS.md — multi-tab UI configs
- PLUGIN_CONFIG_ARCHITECTURE.md — how the config system works
- PLUGIN_CONFIG_CORE_PROPERTIES.md — properties every plugin honors
Advanced features
- ADVANCED_FEATURES.md — Vegas scroll, on-demand display, cache management, background services, permissions
- FONT_MANAGER.md — font system
Reference
- CONFIG_REFERENCE.md — every key in config.json and config_secrets.json
- REST_API_REFERENCE.md — all web-interface HTTP endpoints
- PLUGIN_API_REFERENCE.md — Python APIs available to plugins
- DEVELOPER_QUICK_REFERENCE.md — common dev tasks
Contributing to LEDMatrix itself
- DEVELOPMENT.md — environment setup
- HOW_TO_RUN_TESTS.md — running the test suite
- MULTI_ROOT_WORKSPACE_SETUP.md — multi-repo workspace
- MIGRATION_GUIDE.md — breaking changes between releases
- SPORTS_UNIFICATION.md — how the sports scoreboard base classes are organized
Audits
- audits/WEB_UI_AUDIT_2026-09.md — web UI audit (September 2026)
Contributing to the docs
- Markdown only, professional tone, minimal emoji.
- Prefer adding to an existing page over creating a new one. If you add a new page, link it from this index in the section it belongs to.
- If a page becomes obsolete, delete it (it stays in the repository
history) and fix the links to it;
test/test_doc_links.pyfails on broken relative links. - Keep examples runnable — paths, commands, and config keys here should match what's actually in the repo.