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docs(wiki): DS-2CD1047G3H-LIU main-stream ISAPI snapshot is a firmware bug — camera line to be replaced
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Full live investigation of the persistent 503 "deviceBusy" on main-stream ISAPI
snapshots (10.0.10.13): ruled out config (byte-identical to a working sibling
model), ruled out firmware age (reproduced on both the original V5.8.11 and
current V5.11.0 builds, ~15 months apart), and ruled out real resource
contention (a full channel-ID sweep shows every ID fails identically except
the one hardcoded working value, including nonexistent channels) — pointing
at a broken/incomplete ISAPI snapshot handler that mislabels itself as
"busy," not a real encoder ceiling.

RTSP main-stream frame-grab was confirmed as a working route around it, but
given the bug and the sub-stream's real-world plate-read accuracy problems,
the owner decided to replace the DS-2CD1047G3H-LIU units rather than carry
an ffmpeg/RTSP dependency to work around vendor firmware. Ingested the
vendor datasheet as a source page along the way.

Claude-Session: https://claude.ai/code/session_01FWncR69HgGPuei1dLrW3cU
This commit is contained in:
Julian Çuni
2026-08-23 14:50:22 +02:00
parent 19dff97c74
commit 3a176c5cc8
5 changed files with 255 additions and 3 deletions
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@@ -19,6 +19,7 @@ Counts: 4 sources · 19 entities · 47 concepts · 8 decision records.
- [[dingtian-dt008]] — Dingtian DT-008 product page: QR/RFID access reader (QR/barcode + ID/IC/NFC; Wiegand/TCP-IP/USB/RS485; HTTP-GET push).
- [[qrcode-sdk]] — QRCode SDK v1.6.5: the reader's HTTP-GET-poll protocol + JSON verdict (beep/output).
- [[parksql2017-legacy-schema]] — predecessor SQL Server schema (Albanian market): legacy tariff/discount/membership/shift/fiscal model; confirms blocks, adds time-windows + categories, lacks postpaid sponsors.
- [[ds-2cd1047g3h-liu]] — HIKVISION DS-2CD1047G3H-LIU-F datasheet: 4MP, main stream has no MJPEG option (sub does) — likely explains the model's persistent ISAPI snapshot 503 on main; confirms ISAPI/RTSP both fully in-spec.
## Entities — technology stack
- [[technology-stack]] — the full stack table; all MIT/Apache/BSD, chosen to avoid lock-in.
@@ -39,7 +40,7 @@ Counts: 4 sources · 19 entities · 47 concepts · 8 decision records.
- [[esp32-custom-controller]] — prevention-grade upgrade; device-level auth.
- [[atecc608]] — secure element; non-extractable signing key (host events + controller auth).
- [[wiegand]] — reader standard feeding the controller directly (autonomous permit-holder path).
- [[lpr-camera]] — edge-AI plate recognition; host-side casual-identity source.
- [[lpr-camera]] — edge-AI plate recognition; host-side casual-identity source; DS-2CD1047G3H-LIU main-stream ISAPI snapshot 503 is a firmware bug (only channel 102 ever works, ALL other IDs incl. garbage 503 identically) — firmware update tested, no fix; owner decided to replace the camera line rather than build an RTSP workaround.
- [[dingtian-dt008-reader]] — Dingtian DT-008 QR/RFID reader on hand; host-side serial → `read` bus (the QR-ticket scanner).
- [[zkteco-controller]] — ❌ rejected/historical; aux-input path was a contender, not pursued.
- [[dingtian-relay]] — ✅ CHOSEN access controller; decoupled inputs solve the button blocker (driver verified on hardware); spare relays drive aux outputs (`setAux`).