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The Hosyond 5" panel uses Pi 7" v1.1 architecture (ATTINY ID 0xC3 +
TC358762 DSI-to-DPI bridge). Getting it to paint needed three things
that ESP-IDF doesn't expose:
1. TC358762 bridge configuration — 16 register writes via DSI Generic
Long Write (DT=0x29) packets, transcribed from Linux's tc358762.c.
2. Non-burst video mode — IDF hardcodes BURST_WITH_SYNC_PULSES, but
TC358762 requires NON_BURST_WITH_SYNC_PULSES. Overridden via the
mipi_dsi_host_ll_* API after esp_lcd_new_panel_dpi() and before
panel_init().
3. ATTINY v1.1 power-on sequence + SPI-proxy bridge wake. The legacy
REG_POWERON(0x85) path doesn't apply to 0xC3 firmware; instead
write PORTC/PORTA/PORTB/PORTC in order, then later release bridge
reset and proxy-write TC358762 SYSPMCTRL=0 through the ATTINY's
ADDR_H/L + WR_DATA_H/L registers.
Reaching the LL/HAL APIs requires shadowing esp_lcd_dsi_bus_t so we can
pick the mipi_dsi_hal_context_t out of the private struct. Documented
the layout dependency at the shadow definition.
Tuned config (observed stable on ESP32-P4 per embenix's reference):
- 1 data lane @ 600 Mbps
- DPI 26 MHz (Linux modeline is 25.98)
- timings HSW=2 HBP=46 HFP=210 / VSW=20 VBP=4 VFP=22
- RGB888 end-to-end, R,G,B byte order (BGR was wrong)
- disable_lp=0 so LP windows are available for the bridge writes
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DSI / panel:
- LDO_VO3 acquired at 2500 mV (VDD_MIPI_DPHY) — without this the PHY
PLL busy-waits forever inside esp_lcd_new_dsi_bus.
- PSRAM bumped to 200 MHz (CONFIG_IDF_EXPERIMENTAL_FEATURES) to keep
the DPI fed without underruns.
- Pi-7"-style 800x480 panel init (REG_POWERON, PORTA/PORTB/PWM/PORTC)
+ 16-bit RGB565 framebuffer with portrait-mode rotation buffer in
PSRAM. Currently shows garbled output — known issue, next commit
switches to the TC358762-bridge-aware init sequence.
State + UX:
- viewport_state simplified to AWAKE/ASLEEP only; "unconfigured" is
a flag, not a state. Tap always toggles; content choice (identity
vs frame) is driven by the configured flag.
- BOOT button arms a 15 s identity overlay via local_screens_overlay;
expired callback returns to prior state.
- Boot-done indicator: two backlight flashes (no usable LED GPIO on
the Waveshare board — GPIO 35 BOOT is shared with EMAC TXD1).
- Best-effort subsystem init in app_main; display init deferred to
its own task so a panel hang can't block networking.
Display test pattern: solid R/G/B for 2 s each on boot to characterize
the garble independent of text rendering.
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Real production failure mode for PoE-only deployments: a switch
reboot or briefly down VLAN yanks Ethernet without cutting power.
Confirmed the device handles it cleanly (no panic, no reset, no
state loss) and re-acquires DHCP on link-up.
Serial trace from the bench:
W (748316) net_eth: link down # cable pulled
I (916316) net_eth: link up, mac e8:f6:0a:e0:90:94 # plugged back in
I (924816) net_eth: got ip 10.0.13.83 ... # DHCP renewed ~8.5s later
Same boot throughout — uptime kept climbing past the disconnect, no
ESP reset. The HTTP server stayed bound and the mDNS responder task
kept running through the outage; both resumed serving the moment
DHCP came back. free_heap and free_psram identical to pre-disconnect
(no leak from the cycle).
TESTING.md M1 entry now captures this with the actual log line
sequence. The integration-suite "Cable pull mid-frame" item gets a
✅ for the idle/no-Scrypted variant; the actual mid-frame Scrypted
variant still pending.
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First end-to-end bench verification. Board is the Waveshare
ESP32-P4-ETH (Amazon B0FN7JQ2V8), 32 MB PSRAM, 32 MB flash silkscreen,
ESP-IDF v5.4.1. No panel attached, just board on USB power + LAN.
What passed
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M1 — Ethernet driver up; DHCP lease landed at 10.0.13.83 (gw
10.0.13.1, netmask 255.255.255.0). MAC e8:f6:0a:e0:90:94. 31.7 MB
PSRAM free. Boot completes in ~4s after the kernel handoff.
M2 — GET http://10.0.13.83/state returns the full spec JSON shape
(name=null, configured=false, state=unconfigured, resolution=480x800,
ip=10.0.13.83, free_heap=520995, free_psram=31730048, all counters at
0). mDNS browse from macOS (dns-sd -B _scrypted-viewport._tcp local.)
finds one instance named "viewport" within ~100ms.
Bare-board behavior (Ethernet unplugged) verified too: boot completes
cleanly with summary line `boot complete — subsystems [EMHdJ-B]
ip=(no link)`. Lowercase d = display down because no panel attached;
- for touch because it shares the panel I²C bus.
README status snapshot updated to reflect M1+M2 ✅ on hardware;
TESTING.md M1 and M2 sections gain the 2026-06-14 verification note
plus the three fixes that bring-up exposed (RXD0/RXD1 swap, mDNS
hostname order, elegant subsystem degradation — already shipped in
commit 220ee4c).
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First flash to real hardware (Waveshare ESP32-P4-ETH on USB power,
no LAN cable, no panel attached) exposed three bugs and the need to
degrade gracefully when peripherals are missing.
1. net_eth.c: RXD0 / RXD1 GPIO swap. ESP32-P4's EMAC iomux table
(components/soc/esp32p4/emac_periph.c) fixes RXD0 to GPIO 29 and
RXD1 to GPIO 30. The Waveshare-wiki/ESPHome research had them
transposed. Symptom was:
E (esp.emac.gpio): invalid RXD0 GPIO number
E (esp.emac): esp_eth_mac_new_esp32 failed
-> ESP_ERROR_CHECK abort
Fix: swap the two #defines. CRS_DV / TXD0 / TXD1 / TX_EN / REF_CLK
pinout was already correct.
2. mdns_service.c: mdns_service_add() rejects with INVALID_ARG when
the hostname isn't set yet (see mdns_responder.c:771 — first guard
in mdns_service_add_for_host). We were setting hostname AFTER
service_add inside apply_records(). Restructure mdns_service_start
to: init -> hostname -> service_add -> txt. apply_hostname() and
apply_txt() helpers reuse the same snapshot under viewport_state's
mutex; mdns_service_refresh() re-applies both.
3. app_main.c: every subsystem now best-effort instead of
ESP_ERROR_CHECK abort. A single missing peripheral can't take down
the rest of the firmware. End-of-boot summary line:
boot complete — subsystems [EMHdJ-B] ip=(no link)
Uppercase letter = up, lowercase = down. E=Ethernet M=mDNS H=HTTP
D=Display J=JPEG T=Touch B=BootButton. Touch shows '-' when display
didn't come up (it shares the panel I2C bus). On a stripped board
(just ESP32-P4-ETH on USB, no panel, no LAN) the line above prints
and the device serves /state, /config, and mDNS over the loopback;
plugging Ethernet in later picks up DHCP without a reboot.
Side-effects: the DHCP timeout in app_main shortened from 30s to 15s
so a no-cable boot finishes quickly. Reaching the "ready" state with
no link is fine — the driver keeps the link-up event handler armed and
gets the IP whenever a cable appears.
Verified on hardware (bare ESP32-P4-ETH, no LAN, no panel):
- ESP-IDF v5.4.1, esp32p4, 32 MB PSRAM detected, 16 MB flash config
(actual 32 MB silkscreen — keeping 16 MB until access-beyond-16MB
support lands in flash driver).
- Ethernet driver started — MAC e8:f6:0a:e0:90:94.
- mDNS up advertising viewport.local on _scrypted-viewport._tcp:80.
- HTTP up listening :80.
- JPEG decoder ready.
- Display reports "panel MCU @0x45 unreachable" — exactly correct
for no-panel state.
- Touch skipped as designed.
- BOOT button registered on GPIO 0 (still a guess; harmless if wrong).
This is enough to flip M1's "code" status to ✅ on hardware once
Ethernet is plugged in. M2 (mDNS browse + GET /state) ready to verify.
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local_screens_show_ip() now renders four lines instead of two —
all the device's runtime identity at once:
line 1: viewport name ("mudroom" / "viewport" if unconfigured)
line 2: mDNS hostname ("viewport-mudroom.local" / "viewport.local")
line 3: IP ("192.168.1.42" / "no network")
line 4: state ("awake" / "asleep" / "unconfigured")
Same screen is shown on first boot, after factory reset, and as a
15s BOOT short-press overlay — operator always has the device's full
identity one button-press away (find it on the LAN, confirm name +
configuration without curling).
Font scale is auto-picked: the largest integer scale (1×–6×) where
the longest line fits within 90% of width AND all four lines plus
inter-line spacing fit within 90% of height. Works for both portrait
(480×800) and landscape (800×480) without separate code paths.
Font expanded to cover the new strings:
- All lowercase a–z (added b, f, h, j, k, m, q, s, u, x, y, z).
- Punctuation: dash, slash (digits, period, colon already covered).
Fallback policy unchanged: unsupported chars render as blank, which
keeps the table tight and the failure mode visible rather than
crashing.
README "Local rendering" + TESTING.md M8 updated to describe the
four-line identity layout and show both the unconfigured-boot and
configured-overlay example outputs.
Build verified clean against ESP-IDF 5.4 (binary ~873 KB, +1.6 KB
for the expanded font).
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DESIGN.md was ~80% redundant with README.md (project summary, hardware,
API contract, callback contract, scrypted integration, milestone
acceptance criteria) and ~20% implementation guidance that's now better
served by the source code itself + TESTING.md. Removed it and folded
the unique parts into README.
README.md additions:
- "Status" table at the top: firmware, Scrypted side, hardware — each
with where-we-are + what's-pending columns.
- "Firmware implementation notes" section: source map (one-line per
main/*.{h,c} module), memory strategy, display strategy, error
handling, coding standards. Replaces DESIGN.md sections 7-11, 15, 17.
- "What's next" section before Philosophy: nine items in priority
order, each linking the specific TESTING.md or scrypted/ section.
Makes "pick up cold" trivial.
- Philosophy section absorbed DESIGN.md's "Guiding Rule" as a
blockquote at the bottom.
- "Related docs" rewritten — TESTING.md is now described as *the*
self-contained verification reference.
TESTING.md additions:
- Preamble now describes the five-layer structure and the
⬜/🟡/✅ legend.
- New "Status snapshot" table — milestones + code + HW at a glance.
- New "Hardware prerequisites" — table of what to confirm/order,
plus a numbered list of the four open unknowns (DSI FPC pin count,
I²C jumper destinations, BOOT GPIO, flash silkscreen).
- New "Recommended bench order" — seven stages from "board on
Ethernet over USB" through "integration suite," each with the
commands or where-to-look.
DESIGN.md deleted. Single source of truth is now README.md (spec +
implementation notes + roadmap) and TESTING.md (verification
reference).
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The host field is now optional in "+ Add Device". The script tries
dns.promises.lookup("viewport-<name>.local") via the OS resolver
(Bonjour on macOS, nss-mdns on Linux, host networking on Docker) on:
- every registerViewport call (plugin start, child instantiation,
settings change, periodic 5-min refresh),
- right after createDevice so a fresh viewport's host field is
populated by the time the operator opens its settings page.
On a successful lookup that differs from the stored host, the
resolved IP is written back to the child's storage. POST /config and
POST /frame then use the resolved value.
Falls back gracefully to the operator-entered host (with a one-line
warning if both are empty). A per-viewport "Auto-resolve via mDNS"
toggle (default on) opts out — useful for cross-VLAN setups or hosts
where mDNS doesn't reach.
scrypted/README.md adds a "How mDNS auto-resolve works" section
covering the per-OS resolver requirements and the Docker host-
networking note.
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Convert the Scripts-plugin script from a hardcoded BINDINGS constant
into a DeviceProvider + DeviceCreator + HttpRequestHandler. Each
viewport is now a child Scrypted device under the parent script with
its own Settings page; operators add, edit, and delete viewports
entirely through the Scrypted UI.
Parent (ScryptedViewportProvider):
- DeviceProvider: getDevice(nativeId) instantiates a Viewport, attaches
its camera event listener, and posts /config. releaseDevice tears
down stream + listener + child storage entry.
- DeviceCreator: "+ Add Device" on the parent's page shows a small form
(name / host / camera picker filtered to Camera interfaces /
orientation choice). createDevice() pre-populates the child's storage
via deviceManager.getDeviceStorage(nativeId) and registers it under
the parent.
- Tracks known child nativeIds in its own storage as a JSON array so it
can eagerly instantiate every child on plugin start (each
registration + camera subscription happens at load time, not lazily).
- 5-min re-register loop catches devices that rebooted or got new DHCP
leases.
- HttpRequestHandler routes POST <base>/state on the parent's endpoint;
body {viewport, state} is matched against child names. Honors the
spec race rules: every callback cancels any prior stream + safety
timer for that viewport before applying the new state, and a /frame
409 stops the stream without echoing sleep back.
- Global tuning (frame_interval_ms) lives on the parent's Settings.
Child (Viewport):
- Settings: host (string), camera (type=device with deviceFilter for
the Camera interface — the UX win), orientation (choices), idle
timeout, brightness. All persisted via this.storage.
- putSetting fires onBindingChanged() on the parent so re-register +
re-subscribe happen immediately when any field changes.
scrypted/README.md rewritten for the UI-driven flow — install + add
device + edit + remove + global tuning + smoke test — no more "edit
BINDINGS and re-save."
scrypted/package.json + tsconfig.json: optional `npm install` so
editors can resolve @scrypted/sdk types. Nothing here ships — install
remains "paste into Scripts plugin." node_modules ignored.
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scrypted/scrypted-viewport.ts — single-file TypeScript script for
Scrypted's Scripts plugin. Binds N viewports to N Scrypted cameras and
implements the full Scrypted side of the protocol:
Outbound (Scrypted -> device):
- POST /config on script load + every 5 min (re-syncs after device
reboot or DHCP renumber).
- POST /state {wake} when a bound camera fires an event or when the
device's own POST /state {wake} arrives (operator tap).
- POST /frame at FRAME_INTERVAL_MS (1 fps default) via
camera.takePicture({picture:{width,height}}).
- POST /state {sleep} when the Scrypted-side per-stream timer
expires.
Inbound (device -> Scrypted POST <base>/state):
- {state:wake} -> startStream() (cancels pending sleep timer + any
prior interval, then begins pushing frames).
- {state:sleep} -> stopStream(sendSleep=false) (no echo back).
- Unknown viewport -> 404. Bad body -> 400.
Race rules from the spec are honored:
- Every callback cancels prior pending state for that viewport
before applying the new state (cancelPendingSleep semantics).
- startStream / stopStream are idempotent — re-entering is safe.
- On /frame returning 409, stream stops immediately without
echoing /state {sleep} back (the device already slept).
Configuration is a single BINDINGS array at the top of the file —
edit name/host/cameraId/orientation per viewport and save in the
Scrypted UI. No package install. Tuning constants
(IDLE_TIMEOUT_MS, FRAME_INTERVAL_MS, REREGISTER_INTERVAL_MS, etc.)
are right above the class.
scrypted/README.md walks through Scripts-plugin install, the BINDINGS
schema, what each constant controls, an event-by-event description of
the script's behavior, the v1 limitations (snapshot-rate, manual IP,
camera must respect picture dims), and an end-to-end smoke test.
Top-level README's Scrypted Integration section now links the script
file and the install README directly.
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local_screens.{h,c}:
- Embedded 8x8 bitmap font sized to a 95-char table; only the glyphs
used by today's strings (viewport.local, the IPv4 string, Loading...)
are populated. Unsupported chars render blank.
- 768 KB PSRAM scratch FB at panel-native dims.
- local_screens_show_ip() — two centered lines:
"viewport.local"
<current IP>
Scale 3x portrait / 4x landscape; centered vertically.
- local_screens_show_loading() — centered "Loading..." at scale 4x/5x.
- local_screens_restore_for_state() — repaint after BOOT-overlay expiry:
UNCONFIGURED -> IP screen; AWAKE/ASLEEP -> black FB (next /frame or
sleep handles the rest).
- All paths go through display_present_rgb565() so orientation rotation
is automatic.
button.{h,c}:
- Polling task at 30ms, active-low with internal pull-up.
- Short press (<5s, released) → backlight on, IP overlay for 15s via
esp_timer one-shot, then restore.
- Hold ≥ 5s → nvs_config_reset() + esp_restart().
- PIN_BOOT_BUTTON = GPIO 0 is a TODO placeholder. ESP32-P4 strap pin
GPIO35 is owned by RMII TXD1 at runtime so Waveshare must expose a
separate user button on a free pin; confirm against the schematic.
Fail-soft if mis-wired: input reads stuck-high and the task never
fires.
state_machine on AWAKE transition now calls local_screens_show_loading()
right after display_wake() — so every wake (tap or POST /state) flashes
a clear "Loading..." until the next /frame paints over it.
app_main on boot:
- Calls local_screens_init() after display_init().
- UNCONFIGURED → paint IP screen (replaces the M3 test pattern).
- ASLEEP → backlight off (unchanged).
- After all subsystems: button_init().
Build clean against ESP-IDF 5.4 (binary ~870 KB; the font/glyph data is
under 800 bytes).
TESTING.md M8 documents the visual checks, the BOOT-pin placeholder
caveat, the AWAKE-overlay-overwrite behavior, the open follow-up about
post-overlay backlight when ASLEEP, and the font fallback policy.
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state_client.{h,c}:
- Worker task drains a depth-1 queue (xQueueOverwrite gives the
replace-on-full semantics from the spec — in-flight POST is never
cancelled; the next queued entry is overwritten by newer state).
- esp_http_client POST to <scrypted>/state with Content-Type application/
json, User-Agent ScryptedViewport/<version>, Connection: close, 1s
timeout. Body: {"viewport":"<name>","state":"wake"|"sleep"}.
- Any non-2xx or transport error increments state_post_failures and is
otherwise ignored. Silently drops if no Scrypted URL is configured.
touch.{h,c}:
- FT5426 capacitive touch on the shared I2C bus at 0x38.
- 30ms polling task; tracks down/up transitions, detects taps as
down-then-up within 500ms with a 150ms debounce.
- On tap, toggles wake/sleep via state_machine_set_local(), which drives
the local transition AND fires state_client_post() at Scrypted.
state_machine adds state_machine_set_local(): runs the same transition
as state_machine_set() then enqueues an outbound POST. Idle-timer
expiry now uses this path so Scrypted sees idle-driven sleeps too
(the spec's "tighten the race with /frame 409" path stays in place as
the fallback).
display.h exposes display_i2c_bus(); touch.c uses it instead of
re-initializing the same I2C port.
app_main starts state_client right after the state machine and starts
touch after display init (touch is skipped if display isn't up since
they share the bus).
CMakeLists.txt: add esp_http_client to REQUIRES.
Build clean against ESP-IDF 5.4 (binary ~860 KB; jumped ~210 KB from
M6 because esp_http_client + cJSON path pulls in tcp_transport, mbedtls,
http_parser).
TESTING.md M7: flask-based test receiver, tap dispatch verification,
failure-path check (kill receiver, confirm counter increments),
queue-coalescing behavior, no-POST-on-Scrypted-initiated, no-POST-
when-unconfigured.
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state_machine.{h,c} — central wake/sleep transitions:
- state_machine_init() creates the esp_timer one-shot for the idle timer.
- state_machine_set(target) is idempotent and atomic. On AWAKE: backlight
on, idle timer (re)armed. On ASLEEP: idle timer cancelled, backlight off.
Rejects with INVALID_STATE when the device is unconfigured.
- state_machine_frame_painted() restarts the idle timer if awake; called
by /frame after each successful paint.
- Idle-timer callback transitions to ASLEEP. TODO M7 hook: outbound POST
{viewport, state:sleep} to <scrypted>/state.
http_api.c:
- POST /state: parse {state}, accept "wake"/"sleep", reject others 400.
Unconfigured device → 409 "device unconfigured". Already-in-state → 204
(idempotent no-op). Successful transition → 204.
- POST /frame: 409 Conflict when state != AWAKE. After successful paint,
call state_machine_frame_painted() so the idle clock keeps resetting
while frames stream.
app_main:
- Initialize state_machine before http_api so the route handler can drive
it from request 0.
- After display_init(), reconcile the panel with the boot state:
UNCONFIGURED → test pattern (placeholder until M8 IP screen)
ASLEEP → display_sleep() so a configured device boots dark
AWAKE → leave on (not reached on fresh boot)
Disable path: idle_timeout_ms=0 in /config means the timer is never armed
and a wake state persists until /state {sleep} or a power cycle.
Build clean against ESP-IDF 5.4 (binary ~645 KB).
TESTING.md M6 expands with idempotency checks, 409-when-asleep, 409-when-
unconfigured, idle-timer firing within idle_timeout_ms+slack, /frame
restarting the idle timer, idle-timer disable via idle_timeout_ms=0, and
the M7 dependency note about the missing outbound sleep POST.
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jpeg_decoder.{h,c} wraps esp_driver_jpeg (ESP32-P4 hardware decoder).
- One-time engine + DMA-aligned PSRAM scratch buffer setup (1 MB input,
768 KB output @ panel native 800x480 RGB565).
- try_lock + unlock so concurrent /frame POSTs get 503 instead of
queueing, per spec.
- jpeg_decoder_get_info() reports the dimensions; the http handler
validates them against the effective resolution before painting.
display.h adds display_present_rgb565(src, w, h):
- Landscape: src is 800x480, memcpy 1:1 into the panel framebuffer.
- Portrait: src is 480x800, software rotate 90° CW into the 800x480
panel framebuffer. (PPA / 2D-DMA hardware rotation is a later
optimization if portrait latency matters.)
http_api.c adds POST /frame:
- Content-Type must be image/jpeg → else 400.
- Empty body → 400. > 1 MB → 413. Display not initialized → 500.
- jpeg_decoder_try_lock(0) for concurrency: second post returns 503.
- Body streamed into the decoder's input buffer in chunks.
- Decode failure or dimension mismatch → 400 + decode_errors++.
- Paint failure → 500.
- Success → frames_received++, last_frame_us = esp_timer_get_time(),
204 No Content.
app_main initializes the JPEG decoder after display_init(). Both are
best-effort: failures log a warning and leave the rest of the firmware
running.
CMakeLists.txt: add esp_driver_jpeg to REQUIRES.
Known gap (M6 closes it): /frame currently paints regardless of
wake/sleep state. The 409-when-asleep rule lands with POST /state
in M6.
Build clean against ESP-IDF 5.4 (binary ~640 KB).
TESTING.md M5 expanded with portrait/landscape test commands,
ImageMagick test-image recipes, the full negative matrix (wrong
Content-Type, oversize, wrong dims, concurrent, garbage), and the
M6 dependency note.
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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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display.{h,c} brings up the Hosyond 5\" 800x480 panel via the Raspberry
Pi 7\" touchscreen architecture:
- I2C init to the panel-side MCU at 0x45 (Pi 7\" register map ported
from drivers/gpu/drm/panel/panel-raspberrypi-touchscreen.c).
- POWERON write + 120ms settle.
- ESP32-P4 MIPI-DSI bring-up in DPI video mode: 2-lane, 480 Mbps,
800x480 @ 60Hz, RGB565, canonical Pi 7\" timings (HSW=18/HBP=20/HFP=62,
VSW=4/VBP=27/VFP=18, 30 MHz pixel clock).
- Gamma-corrected (^2.2) PWM brightness via REG_PWM (0x86).
- display_sleep / display_wake hooks for M6.
- display_fill() and display_test_pattern() (8 vertical color bars)
for M3 acceptance and reuse by M8 local screens.
app_main calls display_init() as best-effort — if the panel isn't
attached or wiring is wrong, the rest of the firmware (Ethernet, mDNS,
/state) keeps running. On success it paints the test pattern.
Pin assignments (PIN_I2C_SDA=7, PIN_I2C_SCL=8) match Waveshare's
bundled-panel BSP convention but are flagged TODO until the user's
specific FPC adapter wiring is confirmed.
main/CMakeLists.txt: add driver, esp_driver_i2c, esp_lcd to REQUIRES.
Build verified clean against ESP-IDF 5.4 for target esp32p4. M3
acceptance (color bars on screen) cannot be verified without a
flashed board + connected panel.
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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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net_eth module brings up the Waveshare ESP32-P4-ETH-POE Ethernet
interface (internal EMAC + IP101GRI PHY) and waits for a DHCP lease.
Pin map confirmed via Waveshare wiki + ESPHome's working config:
MDC=31, MDIO=52, REF_CLK=50 (CLK_EXT_IN from PHY)
TX_EN=49, TXD0=34, TXD1=35
CRS_DV=28, RXD0=30, RXD1=29
PHY reset/enable=51, PHY addr=1
app_main initializes NVS, netif, the default event loop, then starts
the Ethernet driver and waits up to 30s for an IP. On success it logs
the IP; on timeout it logs a warning and proceeds (the driver keeps
retrying in the background).
sdkconfig: declare 16 MB flash so partitions.csv (6.1 MB) fits.
main/CMakeLists.txt: explicit REQUIRES esp_eth esp_event esp_netif
nvs_flash.
Acceptance (per M1 in the impl guide): device gets a DHCP lease over
Ethernet and prints its IP. Build is clean against ESP-IDF 5.4 for
target esp32p4.
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Three structural shifts:
1. Discovery section spells out mDNS-SD. The ESP32 runs the ESP-IDF
mdns responder and serves all .local records itself — A, SRV, PTR,
TXT. Scrypted browses _scrypted-viewport._tcp.local with a Node
mDNS-SD library that hits the multicast layer directly. Scrypted
uses the IP from the SRV/A record, NOT OS-level .local hostname
resolution. Re-browse every few minutes for DHCP renumbering.
Manual host:port fallback for non-mDNS deployments.
2. Drop "callback" framing. The device and Scrypted are HTTP peers,
both exposing POST /state with the same body shape {viewport,state}.
Either side can push to the other to set state. Section is renamed
"Device -> Scrypted POST /state". No new vocabulary or semantics —
just the truth about what the protocol is.
- state_post_failures (was: callback_failures)
- state_client.c (was: callback_client.c)
- "callback" replaced with "outbound POST" / "inbound POST" / just
"POST /state" throughout.
3. Explicit no-application-level-ack clause. HTTP 2xx is transport-
only. Device does not retry, does not block subsequent state
changes on the response, does not treat 5xx as anything beyond a
counter increment. Idempotency + /frame 409 + each side's idle
timer cover every failure mode. Scrypted-side logic must not wait
for the device to confirm a state change.
Also: Scrypted Integration code in v2 guide rewritten to discover via
bonjour-service browse rather than hardcoded viewport-<name>.local
URLs. urlFor(name) function resolves the discovered IP per call.
mdns_service.c module spec now explicitly notes Scrypted uses the
browse, not the hostname.
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API surface is now:
GET /state runtime status (replaces /health)
GET /config persisted config
POST /config partial update; brightness is now a field here
POST /state {state: wake|sleep} (replaces /wake and /sleep)
POST /frame unchanged
POST /config now does a partial merge — only present fields are
written. To tweak only brightness, POST {"brightness": 50}.
POST /state replaces POST /wake and POST /sleep with a single
endpoint that takes {state: "wake"|"sleep"}. Idempotent: no-op if
already in the requested state.
Brightness is no longer its own endpoint; it lives in /config with
all the other persisted settings. PWM remains gamma-corrected.
Callback body renamed:
was: {event: wake|sleep, type: tap|timeout}
now: {state: wake|sleep, event: tap|timeout}
The new naming matches POST /state: "state" is the resulting wake/
sleep state and the imperative for Scrypted; "event" is the cause
(tap, timeout, future swipes).
Doc sync: README API/Wake-Sleep/Idempotency/Integration sections and
v2 impl guide API contract, modules, milestones, acceptance criteria
all updated to the new model.
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Previously M5 (Wake/Sleep + idle timer) and M4 (Frame) implicitly
depended on NVS values (orientation, idle_timeout_ms) that did not
exist until M6 (Config Persistence). Moving Config to M4 lets the
downstream endpoints read their parameters from NVS instead of
working around hardcoded defaults.
New order:
M1 Board Bring-Up
M2 HTTP + mDNS
M3 Display Bring-Up
M4 Config Persistence (was M6)
M5 JPEG Frame Push (was M4)
M6 Wake/Sleep/Brightness (was M5)
M7 Touch Callback
M8 Local Screens + BOOT button
M9 Live Stream (/stream)
M4 now also validates orientation and idle_timeout_ms per spec,
applies orientation immediately (mDNS TXT + /health reflect it), and
establishes the brightness default (80) on first boot. M5's test
image is 480x800 by default (portrait); switch to 800x480 if /config
sets landscape. M6's idle timer reads idle_timeout_ms from NVS.
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State model is now strictly wake/sleep, owned by the device:
- Local triggers: tap (toggle), idle timeout (sleep only).
- Remote triggers: POST /wake, POST /sleep. Scrypted decides why
(doorbell, motion, person, schedule) — the device does not know.
- /frame is pure paint: 204 when awake, 409 when asleep, no implicit
wake. Eliminates the race where an in-flight frame could re-wake a
device that just slept on a tap.
Orientation:
- Configurable via /config; default portrait.
- Effective resolution: 480x800 portrait, 800x480 landscape.
- Scrypted must render at the effective resolution. Device does not
rotate or scale JPEG content.
- Orientation flows through mDNS TXT, /health, IP/Loading screens.
Callbacks:
- Add `type` field carrying the cause: tap or timeout (forward-compat
for swipes etc).
- Drop wall-clock timestamp (no RTC, no SNTP).
Other:
- Boot: configured device boots to sleep (backlight off).
- /health adds state, last_frame_ms_ago, frame counters, error
counters, brightness, orientation, idle_timeout_ms.
- idle_timeout_ms: 0 disables; non-zero must be >= 5000; else 400.
- First-boot brightness default 80; apply gamma curve to PWM.
- Watchdog reboots hung tasks; recovers state from NVS.
- On-board status LED indicates network/config state.
- mDNS hostname-collision warning; ops notes.
- Idempotency table summarizing endpoint safety.
- Each viewport is bound 1:1 to a camera in Scrypted-side code.
- Reframe "no rendering engine" honestly as "no general-purpose UI
framework"; IP and Loading screens are the only locally-drawn UI.
Doc sync: v2 implementation guide endpoints, modules, milestones,
acceptance criteria, error handling, and tests all updated to match.
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- Couple backlight and Scrypted streaming as a single wake/sleep state owned by the device.
- Callback events are idempotent imperatives: wake = "start streaming", sleep = "stop streaming". Scrypted does not track viewport state.
- Each viewport is bound to one camera in Scrypted-side code; camera events (doorbell, person, motion) drive streaming.
- idle_timeout_ms set by Scrypted via /config (default 60000). Same value on both sides; timers run independently and either can end a session.
- Tap input only (long_press/swipes out of scope for v1). Tap is internal; callback carries the resulting state.
- IP screen on first boot, after factory reset, and as a 15s BOOT short-press overlay.
- Loading screen between wake and the next /frame.
- BOOT: short press = IP overlay, hold 5s = factory reset.
- Note that Scrypted side is code (Script for v1, custom plugin for v2 with /stream), not configuration.
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Expand README with per-endpoint contracts (response codes, persistence,
size limits, idle/wake semantics) and a Scrypted integration section
covering registration, frame push, and touch handling. Add v2
implementation guide adapted from the DoorView spec.
Co-Authored-By: Claude Opus 4.7 (1M context) <[email protected]>
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Plain ESP-IDF project targeting Waveshare ESP32-P4-ETH-POE with a 5" 800x480
MIPI-DSI capacitive touch panel. Stub app_main with TODOs for Ethernet, mDNS,
HTTP API (/health, /config, /frame, /sleep, /brightness), JPEG decode, and
touch callback delivery per the v1 spec in README.md.
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