- E-paper display simulator: Python port of the C++ Floyd-Steinberg
dithering (same palette, same coefficients) with side-by-side preview
in the web UI. Interactive pan/zoom controls with live re-rendering.
- Frame orientation: landscape / portrait_cw / portrait_ccw setting
controls logical display dimensions (800x480 vs 480x800). Images are
rotated to match the physical buffer after processing.
- Display modes: zoom (cover+crop) and letterbox (fit with padding),
configurable globally and per-image. Zoom mode supports pan_x/pan_y
(0.0-1.0) to control crop position.
- Settings persistence: frame settings, per-image settings, and frame
state stored as JSON, surviving restarts.
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
ESP32-S3 firmware (PlatformIO) that fetches JPEGs from a photo server,
decodes on-device with PSRAM, Floyd-Steinberg dithers to the Spectra 6
6-color palette, and displays on a 7.3" GDEP073E01 e-paper panel.
Deep sleeps 1 hour between updates.
Photo server (Python/Flask) with web UI for photo management, Traefik
routing at photos.haunt.house with Google OAuth, and Home Assistant
REST sensor integration.
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
