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Widget system Phase 3: calendar widgets become size-aware
calendar_render.py's _build_* functions now take a real target box
and pick font sizes/margins from three discrete size tiers (nearest
pixel-area fit) instead of always laying out at full panel size and
resizing after the fact -- a calendar widget placed smaller than the
full panel gets an actually-legible layout instead of shrunk text.
Month view falls back to agenda below the smallest tier, where 7
columns can no longer stay readable.

The old photo-inlay split (inlay_region/_content_region/_paste_inlay)
is deleted along with it -- arbitrary widget placement already
subsumes what a fixed half-panel split did, and every call site has
passed photo_inlay=None since the Phase 2 cutover.

Also adds HTTP-level test coverage for GET .../preview/calendar,
which had none before this -- it's what caught a stale photo_inlay
kwarg left over from the _build signature change that would have
TypeError'd on every request.
2026-07-24 09:38:10 -04:00
2026-07-22 19:07:29 -04:00

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

See docs/hardware.md for wiring and docs/architecture.md for how the two halves talk to each other.

Getting started

  1. server/ -- run the FastAPI server first (Docker Compose, points at your Immich instance). See server/README.md.
  2. firmware/ -- build and flash the ESP32-C6, then scan the QR codes it draws on first boot to provision it. See firmware/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.

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