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efb0f2e22d
The hand-drawn glyphs (draw_cloud/draw_sun/draw_raindrop/draw_snowflake/ draw_lightning_bolt) are replaced by 7 vendored bitmaps, one per shared weather category, sourced from weather.gc.ca's public icon set -- these are small, flat-shaded images that dither cleanly onto the panel's 6-color palette and read as recognizable weather icons in a way the hand-drawn attempt (a plain circle-with-ticks "sun") didn't. Used for every provider's rendering (Open-Meteo, NWS, EC), not just when EC is selected. Vendored (not fetched live at render time), matching this project's existing convention for the Noto Emoji fonts -- server/app/weather_icons/ SOURCE.md documents the source, attribution, and the licensing caveat (this is a personal, non-commercial project; the icon images' own copyright terms are less clearly permissive than the weather data's own End-use Licence, since they're served from the public website rather than ECCC's data servers). draw_weather_icon's signature changes from (draw, cx, cy, r, category, palette_rgb) to (img, cx, cy, r, category): pasting a bitmap needs the Image object, not just an ImageDraw handle, and palette_rgb is no longer needed since the shared _quantize step already maps whatever's on the composited canvas to the frame's actual palette -- no per-icon color resolution required anymore.
ESPresso Frame
A DIY e-ink photo frame: an ESP32-C6 pulls photos from your Immich library and displays them on a 7.3" full-color e-paper panel, waking on a timer to refresh and spending the rest of its time in deep sleep.
- No cables to a computer, no SD card shuffling. Provisioning is a captive portal with a QR code drawn on the panel itself -- scan, join, fill in your WiFi and server address, done.
- The frame never decodes an image. A small self-hosted server does all the work (pulling from Immich, cropping, dithering, packing into the panel's exact pixel format) and hands the device a stream it can write straight to SPI. The ESP32-C6 has no PSRAM and not much SRAM to spare -- keeping it a dumb display client is what makes that workable.
- Crops toward faces, not just the center, using face bounding boxes Immich already computed for its own People feature -- no bundled face detector.
- Refresh interval and album are configurable from a web UI, no reflashing needed to change them.
Hardware
- ESP32-C6 dev board (8MB flash)
- Waveshare 7.3" E Ink Spectra 6 (E6) panel -- 800x480, 6-color, SPI
See docs/hardware.md for wiring,
docs/architecture.md for how the two halves talk
to each other, and docs/widgets.md for the server's
placeable photos/calendar/whiteboard widget system.
Getting started
server/-- run the FastAPI server first (Docker Compose, points at your Immich instance). Seeserver/README.md.firmware/-- build and flash the ESP32-C6, then scan the QR codes it draws on first boot to provision it. Seefirmware/README.md.
Repo layout
firmware/ ESP-IDF project for the ESP32-C6
server/ FastAPI server: Immich -> crop/dither/pack -> the frame
docs/ Wiring and architecture notes
License
MIT -- see LICENSE. A few small pieces of vendored
third-party code (a QR code generator, a bitmap font table) keep their
own permissive licenses; see LICENSE for details.
Built with substantial assistance from Claude Code.