@thermal-label/d1-core

Shared D1 tape-protocol primitives for the DYMO LabelManager and LabelWriter Duo (tape side) drivers.

The D1 protocol is ESC A..E plus SYN (per the LW 400 Series Tech Ref and on-the-wire analysis). Both standalone LabelManager chassis and the LabelWriter Duo's tape engine speak it; this package centralises the encoder, status parser, tape-type table, and the shared cassette catalogue so both drivers stay byte-for-byte aligned.

Pages

• D1 tape protocol — opcode vocabulary, job structure, and the per-opcode wire reference.
• Chassis and USB topology — devices, interfaces, mode-switch, head geometry, WebUSB.
• API reference — TypeDoc-generated reference for the @thermal-label/d1-core package.

API surface

• buildPrinterStream(bitmap, engine, options, media) — encode a print job to a contiguous USB Printer-class byte stream.
• parseStatus(bytes) + STATUS_REQUEST — single-byte D1 status decoder (same shape on every D1 device).
• tapeTypeFor(media) + TAPE_TYPE_DEFAULT / TAPE_TYPE_MAX — map a user-selected media's text / background colours to the ESC C n selector (0..12). Host-declared: D1 firmware can detect cassette presence but not type.
• D1_MEDIA / D1_MEDIA_LIST — the unified D1 cassette catalogue (71 entries today: standard + Permanent Polyester + Flexible Nylon
  • Durable + Rhino-vinyl / -permanent / -flexible / -heat-shrink / -non-adhesive). 24 mm Standard included for the 128-dot Duo tier. Missing: 24 mm Rhino, Self-Laminating Rhino — pending authoritative SKU sources.