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Rongta 80mm printer: driver, role-based failover, live status monitoring

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Add the rongta PrinterDevice driver (ESC/POS over raw TCP 9100) and the
device-agnostic pieces around it:

- Roles + failover: each printer declares a role (entry-dispenser/booth-
  receipt) and failoverRank; printer-routing.ts picks the best healthy printer
  and falls back outside->booth for entry tickets (never the reverse).
- Live status: MonitorableDevice.readStatus()/PrinterStatus capability. The
  Rongta driver scrapes the device's own /prn_stat.htm (Cover/Cutter/Paper
  End/Near End/Off-Line) rather than hand-decoding DLE EOT, whose reply bytes
  on this clone don't match the canonical ESC/POS bit layout (verified on
  hardware) -- avoids a false-healthy. Maps to ready/degraded/offline, fail
  safe on an unreachable or unexpected page.
- Server PrinterMonitor polls enabled printers (PRINTER_POLL_MS, default 5s),
  caches latest, emits "printer-status" on change. Exposed via
  GET /api/printers/status and an SSE stream for the booth UI.

Verified against 10.0.10.6: ready when healthy, offline when unreachable
(no throw), bus emits on change and suppresses unchanged reads.

Wiki: new rongta-printer entity, printer-roles-failover and
printer-status-monitoring concepts; BOM/index/log updated.
This commit is contained in:
Julian Çuni
2026-06-14 20:26:45 +02:00
parent 2a86e578a8
commit b2a0471b08
15 changed files with 878 additions and 3 deletions
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wiki/entities/bom.md
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@@ -17,8 +17,8 @@ payment terminal is dictated by the acquiring bank. (See [[parking-system-archit
| Access controller | [[dingtian-relay]] relay+input board | Decoupled inputs (host-in-the-loop); **isolate the VLAN** ([[network-isolation]]). ([[uhppote-controller]]/[[zkteco-controller]] rejected) |
| Permit readers | Nedap/Kathrein UHF, or Mifare → [[wiegand]] | Hands-free, or autonomous offline decisions |
| Casual identity | [[lpr-camera]] (Milesight, edge AI) | Plate = ticket + independent record |
| Ticket dispenser | Custom VKP80 | Parking-grade thermal/ESC-POS |
| Booth printer | Epson TM / Citizen (USB or network) | ESC/POS; one adapter covers both transports |
| Ticket dispenser | [[rongta-printer]] 80mm (entry-dispenser role) | ESC/POS over raw TCP 9100; driver written |
| Booth printer | [[rongta-printer]] 80mm (booth-receipt role) | Receipts + backup for entry tickets ([[printer-roles-failover]]) |
| Payment | Bank-certified P2PE standalone terminal + cash drawer | Keeps the app out of **PCI-DSS scope** |
| Host machine | Fanless industrial PC + UPS + [[atecc608]] | Reliability, power-loss safety, offline signing |
| Network | Managed VLAN switch, PoE+ | Isolate the open control protocol |