mca/parking_solution
3
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases 10 Wiki Activity

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

Browse Source 
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
Download Patch File Download Diff File Expand all files Collapse all files
wiki/index.md
+4 -1
View File
@@ -7,7 +7,7 @@ updated: 2026-06-14
# Index
Content catalog for the wiki. Start at [[overview]]. Maintained on every ingest.
Counts: 1 source · 14 entities · 10 concepts · 2 decision records.
Counts: 1 source · 15 entities · 12 concepts · 2 decision records.
## Overview & navigation
- [[overview]] — the top-level synthesis and entry point.
@@ -39,6 +39,7 @@ Counts: 1 source · 14 entities · 10 concepts · 2 decision records.
- [[lpr-camera]] — edge-AI plate recognition; host-side casual-identity source.
- [[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).
- [[rongta-printer]] — ✅ CHOSEN 80mm thermal printer; ESC/POS over raw TCP 9100; driver written, one unit reachable at 10.0.10.6.
- [[bom]] — reference bill of materials (barrier, loops, controller, readers, payment, host, network).
## Concepts — foundational forces
@@ -57,6 +58,8 @@ Counts: 1 source · 14 entities · 10 concepts · 2 decision records.
- [[device-input-flow]] — button → device push → backend decides → relay; backend is source of truth.
- [[device-discovery]] — optional driver capability to scan the LAN (no current driver uses it; UHPPOTE was the example).
- [[barrier-not-a-door]] — never timed-close a barrier; safety lives in barrier firmware.
- [[printer-roles-failover]] — ≥2 printers per lane by role; entry ticket falls back outside→booth.
- [[printer-status-monitoring]] — live poll of paper/cover/cutter/offline via the device's status page; SSE to the booth UI.
- [[trust-boundary]] — the core fork: network vs. device; auditable vs. unforgeable.
- [[fail-state-safety]] — entry fails closed, exit fails open; manual override; watchdog.