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nvs_config.{h,c} — persist the runtime config (viewport, scrypted,
idle_timeout_ms, orientation, brightness) under a single NVS namespace.
nvs_config_load() applies persisted values over the in-RAM defaults on
boot and flips state from UNCONFIGURED to ASLEEP once both name and
Scrypted URL are present. nvs_config_save() commits the whole record
atomically.
http_api.c — add GET /config and POST /config:
- GET serializes viewport_state to the spec's JSON shape, with null
for unset string fields and defaults filled in for the rest.
- POST is partial: each field is optional; only present fields are
validated and applied. Validation runs on a staged copy and errors
short-circuit with 400 + reason before any state mutation, so a
rejected request leaves the device untouched.
- Validation rules: viewport non-empty <64 chars; scrypted starts with
http:// and <256 chars; idle_timeout_ms 0 or >=5000; orientation in
{portrait,landscape}; brightness 0..100.
- Side-effects fire after the lock + save: brightness change pushes
PWM to the panel MCU; viewport/orientation change reapplies mDNS
hostname + TXT.
- 204 on success; 400 with a single-line reason on validation error.
app_main calls nvs_config_load() right after viewport_state_init(), so
mdns_service_start() and display_init() see the persisted hostname,
orientation, and brightness from the first packet/PWM.
Build clean against ESP-IDF 5.4 (binary ~620 KB).
TESTING.md M3 now documents the Hosyond jumper wiring (5V/GND/SDA=GPIO7/
SCL=GPIO8 from board to panel header; DSI FPC carries only the high-
speed lanes). M4 entry expands the validation matrix and side-effects
to verify.
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- viewport_state.{h,c}: shared state struct (config, run-state, counters,
orientation, timestamps) behind a FreeRTOS mutex. Modules update it
under viewport_state_lock(); GET /state serializes a snapshot.
- http_api.{h,c}: starts esp_http_server on :80, registers GET /state.
Returns the full JSON shape from the spec (name, version, configured,
state, uptime_ms, last_frame_ms_ago, frames_received, decode_errors,
state_post_failures, resolution, ip, free_heap, free_psram).
- mdns_service.{h,c}: mdns_init + advertise _scrypted-viewport._tcp.local
on :80 with version/resolution/orientation/name TXT records.
mdns_service_refresh() reapplies hostname + TXT after /config writes
(called from M4 onward).
- main/CMakeLists.txt: add esp_http_server, esp_timer, json, mdns to
REQUIRES. espressif/mdns added as managed component via
main/idf_component.yml.
app_main calls viewport_state_init early so any module can read defaults
before /config arrives.
Also adds TESTING.md tracking per-milestone verification status and an
integration test plan to run after M9 (races, failure modes, longevity,
power cycles, negative protocol, multi-viewport).
M1 promoted to "🟡 builds clean" in TESTING.md; combined HW verification
of M1+M2 will be one flash session. Build verified against ESP-IDF 5.4
for target esp32p4 (binary ~550 KB).
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