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Server: Frame.panel_type (new column + migration) is auto-derived from the device's reported board (X-Frame-Board), never user-set -- the panel is a property of the hardware, not a picker in the UI. image_pipeline's packing/render pipeline is parameterized by panel geometry instead of hardcoded 800x480 globals, with the real confirmed 13.3in geometry (1600x1200) registered alongside the original 7.3in panel. Existing 7.3in frames are unaffected (column default + board mapping both resolve to the original panel). Board identifiers are also renamed (devkit/xiao -> devkit_esp32c6/ xiao_esp32c6, plus new "ee02") since the EE02 board also carries a XIAO module -- "xiao" alone stopped disambiguating hardware. The server keeps accepting the legacy bare names indefinitely for already-flashed devices. Firmware: scaffolds a third build target (ee02, ESP32-S3 -- a real chip-target change, not just a same-chip Kconfig variant like xiao) and a new epd13in3e driver component skeleton. The actual panel init/LUT/ refresh register sequence isn't ported from vendor demo code yet (none was available), so that component deliberately fails to compile (#error) rather than risk sending unverified register values to real hardware -- devkit/xiao are unaffected and build identically to before. CI's ee02 build step is continue-on-error for the same reason.
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.