julian
d71ba82999
After a completed payment the customer always gets a transparency record:
entry time, payment time, duration parked, amount + tender. One shared
ESC/POS renderer (renderReceipt + ReceiptData in @parking/devices), two
modes: VOUCHER = those figures PLUS the scannable Code128 barcode and an
emphasised walk-back-grace line, so the one slip both proves payment and
self-exits at a distant exit reader (replaced the old barcode-only voucher);
STANDALONE = detail-only, auto-printed at payment when no voucher is issued.
Figures fold from the SIGNED ledger (latest payment event); printed on the
booth printer (failover to dispenser). Best-effort: a printer fault never
blocks the exit that already happened — the modal shows a note and offers
"Reprint receipt".
Server: booth-print.ts printPaymentReceipt() + receiptFigures(); routes
POST /api/voucher (voucher) + new POST /api/receipt (standalone/reprint).
Both ESC/POS drivers gained printReceipt(). Web: BoothPayModal auto-prints
after a non-voucher payment + reprint button; api.ts printReceipt().
CP852 fixes found on a real printout: (1) uppercase Ë was mapped to 0xEB
(that's ű) — correct byte is 0xD3; (2) Intl.NumberFormat injects a NO-BREAK
SPACE (U+00A0/U+202F) that isn't in CP852 and printed as "?" — line() now
normalises it to a plain space ("1000 Lekë"); (3) grace line wrapped
mid-word — split into two short lines.
Full build green; both receipt modes render-verified; routes live.
Claude-Session: https://claude.ai/code/session_01Xcm6ikLgGoCxxHrxtjkk5V
75 lines
4.4 KiB
Markdown
75 lines
4.4 KiB
Markdown
---
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type: entity
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tags: [parking, hardware, printer, device]
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sources: []
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updated: 2026-06-14
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---
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# Rongta 80mm thermal printer
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The chosen ticket/receipt printer: a **Rongta RP-series 80mm network thermal printer** (and the
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many ESC/POS-compatible OEM clones that share its firmware). Driver `rongta` in
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`packages/devices` implements [[device-adapter-pattern|PrinterDevice]].
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## Transport & protocol
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- **ESC/POS over a raw TCP socket on port 9100** (the JetDirect/RAW convention). The driver
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opens the socket, writes the ESC/POS byte stream, waits for flush, closes.
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- **No authentication** on the print socket — anyone who can reach port 9100 can print. Like
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every other field device it must sit on the **isolated device VLAN** ([[network-isolation]]).
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There is no real HTTP/control boundary on the device (same posture as [[dingtian-relay]]).
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- **Health check** is a TCP connect probe to 9100. The print socket exposes no status protocol
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we rely on; the print itself is the real reachability test (failover attempts the print).
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- **Live status** comes from the device's own web page `http://<host>/prn_stat.htm` (port 80),
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which decodes Cover Open / Cutter Error / Paper End / Paper Near End / Off-Line into Yes/No.
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We scrape that rather than hand-decode `DLE EOT` — this clone's DLE EOT reply bytes do **not**
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match the canonical ESC/POS bit layout (verified on hardware), so trusting the device's own
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decode avoids a false-healthy. Implemented as `readStatus()`; see [[printer-status-monitoring]].
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## Deployment (this site)
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- First printer verified reachable at **10.0.10.6:9100** from the host (TCP connect OK,
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2026-06-14).
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- **Two printers configured (as of 2026-06-18)**, by role — see [[printer-roles-failover]]:
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- **entry-dispenser** — `10.0.10.9`, outside at the lane; the driver takes the entry
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ticket. This unit is a **Cashino**, not a Rongta: it prints the same ESC/POS stream but
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serves no `/prn_stat.htm` status page, so it runs on the `cashino` driver (reachability
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PING only, no paper/cover status) — see [[printer-status-monitoring]].
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- **booth-receipt** — `10.0.10.10`, inside the booth; receipts, AND the backup that prints
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the entry ticket if the outside dispenser is offline. This unit is a **Rongta** (`rongta`
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driver, full status-page monitoring).
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## Ticket rendering
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`printTicket(TicketData)` builds ESC/POS: `ESC @` init, centered/bold/double-size header,
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lane, ticket id, issued-at, feed + partial cut (`GS V B`). CP437/ASCII subset. The entry ticket
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encodes the id as a **1D Code128** barcode (`GS k`).
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**`printSubscriptionCard(SubscriptionCardData)`** (added 2026-06-18) renders a **2D QR** of the
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[[subscription]] code via ESC/POS **`GS ( k`** (model 2, EC level M) — firmware-rendered, no bitmap
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dependency — plus the code as text + holder/validity. Used for the auto-printed + reprintable
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subscription card. (Verified: the `GS ( k` store/print byte sequences + the embedded code appear on
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the wire against a TCP capture.)
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**`printReceipt(ReceiptData)`** (added 2026-06-18) — the payment receipt / exit voucher
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([[booth-exit-flow]]). Same ESC/POS preamble; figures + amount, optional Code128 + grace.
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### CP852 codepage — two gotchas found on a real misprint (2026-06-18)
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The driver selects **CP852** (Latin-2) via `ESC t 18` and maps the Albanian letters to their CP852
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bytes. A printed voucher surfaced two encoding bugs, both now fixed in `printer-escpos.ts`:
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- **Uppercase `Ë` was mapped to `0xEB` — wrong.** In CP852 `0xEB` is `ű`; the correct byte for
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`Ë` (U+00CB) is **`0xD3`**. The title `BILETË DALJE` / `FATURË PAGESE` printed garbled until fixed.
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(Lowercase `ë` = `0x89` was always correct.) Anyone extending the CP852 map must verify bytes
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against the actual Unicode.org `CP852.TXT`, not guess.
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- **`Intl.NumberFormat` injects a NO-BREAK SPACE.** Formatting `ALL` money yields `"1000 Lekë"`
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(separator = U+00A0, sometimes U+202F narrow NBSP) — neither is in CP852, so it printed as `1000?Lekë`.
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`line()` now normalises U+00A0/U+202F → a plain space before encoding. Any Intl-formatted value on a
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ticket is affected, not just money.
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## Status
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Driver written and compiles; entry-ticket layout is a first pass; live status monitoring is
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implemented and verified ([[printer-status-monitoring]]). The receipt/exit layout and the
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cash-drawer kick (ESC/POS `ESC p`) are **not yet implemented** — they arrive with the
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exit/payment flow. Replaces the generic "Epson TM / Citizen" booth-printer line in [[bom]].
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