# pictureFrame — web app

Handcrafted e-ink digital picture frame ecosystem — built as a meaningful gift. ESP32 firmware pulls pre-rendered images from a Symfony web app over WiFi; the companion web app handles image management, device configuration, and family sharing.

## Project goal

Build gifted e-ink frames that stay personal and current over time, with no ongoing effort required from the recipient. One image per configured interval, cycling through a curated pool of family uploads and shared photos. Setup: scan two QR codes. Ongoing: nothing unless the recipient wants it.

## Stack

- **Firmware:** PlatformIO + Arduino framework (C/C++), ESP32 dev board
- **Web app:** Symfony 8.0 (PHP 8.4+), PostgreSQL 16, Nginx-FPM
- **Local dev:** DDEV — mirrors `~/src/aqua-iq` setup
- **Git:** git.edholm.me (self-hosted Gitea/Forgejo)
- **Domain:** pictureframe.edholm.me

## Hardware

### Dev / V1 hardware (in hand)
- ESP32 dev board (`esp32dev`), dual-core 240MHz, 4MB flash
- Waveshare 7.3" 6-color e-ink (800×480)
- SPI pinout: SCK=18, MOSI=23, CS=5, DC=17, RST=16, BUSY=4
- 4bpp packed, palette: BLACK=0x0, WHITE=0x1, YELLOW=0x2, RED=0x3, BLUE=0x5, GREEN=0x6 (same map as Spectra 6; 0x4 unused)

### Target / V2 hardware (on order)
- Waveshare ESP32-S3-ePaper-13.3E6 — 13.3" **Spectra 6** (6-color), ESP32-S3 onboard
- Spectra 6 palette: same as above — BLACK=0x0, WHITE=0x1, YELLOW=0x2, RED=0x3, BLUE=0x5, GREEN=0x6
- Battery or plugin at recipient's choice

## Design decisions

- Server pre-renders all images to display-ready 4bpp per device model/orientation — ESP32 never transforms images
- Device pull model: `GET /api/device/{mac}/image` → 200 (binary), 204 (no ready image), 404 (unknown MAC)
- Atomic image write: display only refreshes after complete confirmed transfer; last good image persists through outages
- Deep sleep between pull cycles (see ESP32 deep sleep memory)
- Status via border color: yellow = sync fail, red = no WiFi
- Holding the BOOT button until the screen starts to flash triggers re-provisioning (config wipe + AP mode). Threshold is 5 s in firmware (RESET_HOLD_MS), but user-facing terminology is "hold until the screen flashes" because total wall-clock time-to-visible-change includes a ~20 s e-ink redraw, and a too-short press just wakes the device into a normal poll cycle.
- Two-phase provisioning: AP mode (WiFi credentials) → STA mode (QR to account setup page)
- Async image processing: Symfony Messenger (Doctrine transport), `max_retries: 1`
- Image storage: `storage/images/{id}/{model}_{orientation}.bin`, relative paths in DB
- PHP 8.1 backed enums for `RenderStatus`, `TokenType`, `Orientation`
- Imagick for Floyd-Steinberg dithering (not GD)
- No OTA firmware updates in V1 — API contract must not break without reflash

## Infrastructure reference

For Docker/DDEV config, server location, and SSH details: `~/src/aqua-iq`

## Full spec

See `_bmad-output/planning-artifacts/` — PRD, architecture, epics all complete as of 2026-04-27. Symfony web app scaffold + Vue SPA frontend scaffolded. Firmware fully rewritten with WiFi, provisioning, and deep sleep (`firmware/src/`).
