0.1.27

Merge pull request '0.1.25' (#6 ) from 0.1.25 into main
Reviewed-on: #6
2026-03-16 14:17:49 +01:00 · 2026-03-16 12:48:37 +00:00 · 2026-03-16 13:48:12 +01:00 · 2026-03-16 11:44:45 +00:00 · 2026-03-16 12:43:26 +01:00 · 2026-03-16 09:26:06 +00:00
18 changed files with 766 additions and 1516 deletions
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -4,6 +4,94 @@ All notable changes to this project are documented in this file.

 The format is based on Keep a Changelog and this project uses Semantic Versioning.

+## [0.1.27] - 2026-03-16
+
+### Changed
+
+- **Project Structure**: Moved the `fichero` library into `fichero_printer/` to make the add-on self-contained. This simplifies the build process and removes the need for synchronization scripts.
+- Fixed invalid duplicate `version` keys in `pyproject.toml` and `config.yaml`.
+
+## [0.1.26] - 2026-03-16
+
+### Fixed
+
+- **Build Process**: Fixed `too many links` Docker build error by removing the symlink-based approach. Introduced a `sync_addon.sh` script to automate copying the library into the add-on directory, which is required for the Home Assistant build system.
+
+## [0.1.25] - 2026-03-08
+
+### Changed
+
+- **Build Process**: Replaced the manually copied `fichero` directory inside the Home Assistant add-on with a symbolic link. This eliminates code duplication and automates synchronization, simplifying the build process.
+
+## [0.1.24] - 2026-03-08
+
+### Fixed
+
+- **Home Assistant Build**: Reverted the add-on's `Dockerfile` to a vendored code approach to resolve build failures caused by the Home Assistant build system's inability to access files outside the add-on directory. The add-on is now self-contained again.
+
+## [0.1.23] - 2026-03-08
+
+### Changed
+
+- Updated the Home Assistant add-on's `Dockerfile` to install the main library as a package, completing the project structure refactoring.
+- Added `python-multipart` as an explicit dependency for the API server.
+
+## [0.1.22] - 2026-03-08
+
+### Changed
+
+- **Refactored Project Structure**: Eliminated duplicated code by converting the project into an installable Python package. The Home Assistant add-on now installs the main library as a dependency instead of using a vendored copy, improving maintainability and preventing sync issues.
+
+## [0.1.21] - 2026-03-08
+
+### Fixed
+- Synchronized the Home Assistant add-on's source code (`fichero_printer/fichero/`) with the main library to fix stale code and version mismatch issues.
+
+## [0.1.20] - 2026-03-08
+
+### Changed
+
+- Refactored the embedded web UI in the API server to be loaded from a separate `index.html` file instead of a large inline string, improving maintainability.
+
+## [0.1.19] - 2026-03-08
+
+### Added
+
+- Added `POST /unpair` endpoint and "Unpair Device" button in the web UI to remove a Bluetooth device from the host's paired devices.
+
+## [0.1.18] - 2026-03-08
+
+### Added
+
+- Added `POST /pair` endpoint and "Pair Device" button in the web UI to easily pair/trust the printer via `bluetoothctl` for Classic Bluetooth connections.
+
+## [0.1.17] - 2026-03-08
+
+### Added
+
+- Added automatic fallback to BLE connection if Classic Bluetooth (RFCOMM) fails with `[Errno 12] Out of memory`, a common issue on Linux with stale device states.
+
+## [0.1.16] - 2026-03-08
+
+### Fixed
+
+- Corrected typos in the Code128B bit pattern table for characters '$' (ASCII 36) and ')' (ASCII 41), which caused incorrect barcodes to be generated.
+
+## [0.1.15] - 2026-03-07
+
+### Fixed
+- Added BLE recovery path for `br-connection-not-supported`: the connector now forces a fresh LE scan target resolution and retries before returning an error.
+
+## [0.1.14] - 2026-03-07
+
+### Fixed
+- Removed BLE fallback to raw MAC string when device resolution fails. The connector now requires a discovered LE device object, avoiding BlueZ BR/EDR misclassification that can cause `br-connection-not-supported`.
+
+## [0.1.13] - 2026-03-07
+
+### Fixed
+- Treated BLE service-discovery disconnects (`failed to discover services, device disconnected`) as retryable transient errors in the BLE connect loop.
+
 ## [0.1.12] - 2026-03-07

 ### Fixed
--- a/README.md
+++ b/README.md
@@ -140,6 +140,18 @@ asyncio.run(main())

 The package exports `PrinterClient`, `connect`, `PrinterError`, `PrinterNotFound`, `PrinterTimeout`, `PrinterNotReady`, and `PrinterStatus`.

+## Troubleshooting
+
+### Classic Bluetooth: [Errno 12] Out of memory
+
+If you encounter `[Errno 12] Out of memory` failures on Classic Bluetooth connections, it typically implies a stale state in the BlueZ stack or the printer's radio. As of v0.1.17, the library automatically falls back to a BLE connection when this specific error occurs.
+
+If you wish to resolve the underlying Classic Bluetooth issue, these steps can help:
+
+- **Power cycle the printer**: This clears the printer's radio state and is often the only fix if the device is rejecting RFCOMM.
+- **Verify Pairing**: Classic Bluetooth (RFCOMM) requires the device to be paired and trusted in the OS. You can use the "Pair Device" or "Unpair Device" buttons in the Home Assistant add-on's web UI, or run `bluetoothctl pair <MAC>` and `bluetoothctl trust <MAC>` (or `bluetoothctl remove <MAC>`) on the host. Pairing is not required for BLE.
+- **Restart Bluetooth**: `systemctl restart bluetooth` on the host can clear stuck socket handles.
+
 ## TODO

 - [ ] Emoji support in text labels. The default Pillow font has no emoji glyphs, so they render as squares. Needs two-pass rendering: split text into emoji/non-emoji segments, render emoji with Apple Color Emoji (macOS) or Noto Color Emoji (Linux) using `embedded_color=True`, then composite onto the label.
--- a/fichero/init.py
+++ b/fichero/init.py
@@ -1,25 +0,0 @@
-"""Fichero D11s thermal label printer - BLE + Classic Bluetooth interface."""
-
-from fichero.printer import (
-    RFCOMM_CHANNEL,
-    PrinterClient,
-    PrinterError,
-    PrinterNotFound,
-    PrinterNotReady,
-    PrinterStatus,
-    PrinterTimeout,
-    RFCOMMClient,
-    connect,
-)
-
-__all__ = [
-    "RFCOMM_CHANNEL",
-    "PrinterClient",
-    "PrinterError",
-    "PrinterNotFound",
-    "PrinterNotReady",
-    "PrinterStatus",
-    "PrinterTimeout",
-    "RFCOMMClient",
-    "connect",
-]
--- a/fichero/api.py
+++ b/fichero/api.py
@@ -5,6 +5,7 @@ Start with:
 or:
    python -m fichero.api

+
 Endpoints:
    GET  /status           – Printer status
    GET  /info             – Printer info (model, firmware, battery, …)
@@ -17,8 +18,10 @@ from __future__ import annotations
 import argparse
 import asyncio
 import io
+import re
 import os
 from contextlib import asynccontextmanager
+from pathlib import Path
 from typing import Annotated

 from fastapi import FastAPI, File, Form, HTTPException, UploadFile
@@ -72,7 +75,7 @@ async def lifespan(app: FastAPI):  # noqa: ARG001
 app = FastAPI(
    title="Fichero Printer API",
    description="REST API for the Fichero D11s (AiYin) thermal label printer.",
-    version="0.1.9",
+    version="0.1.27",
    lifespan=lifespan,
    docs_url=None,
    redoc_url=None,
@@ -94,301 +97,20 @@ def _address(address: str | None) -> str | None:
 def _ui_html() -> str:
    default_address = _DEFAULT_ADDRESS or ""
    default_transport = "classic" if _DEFAULT_CLASSIC else "ble"
-    return f"""<!doctype html>
-<html lang="en">
-<head>
-  <meta charset="utf-8">
-  <meta name="viewport" content="width=device-width, initial-scale=1">
-  <title>Fichero Printer</title>
-  <style>
-    :root {{
-      --bg: #f4efe6;
-      --panel: #fffaf2;
-      --line: #d8cdbd;
-      --ink: #2d241d;
-      --muted: #6c6258;
-      --accent: #b55e33;
-      --accent-2: #245b4b;
-    }}
-    * {{ box-sizing: border-box; }}
-    body {{
-      margin: 0;
-      font-family: "Noto Sans", system-ui, sans-serif;
-      color: var(--ink);
-      background:
-        radial-gradient(circle at top left, #fff8ed 0, transparent 35%),
-        linear-gradient(180deg, #efe4d3 0%, var(--bg) 100%);
-    }}
-    main {{
-      max-width: 980px;
-      margin: 0 auto;
-      padding: 24px 16px 40px;
-    }}
-    .hero {{
-      margin-bottom: 20px;
-      padding: 24px;
-      border: 1px solid var(--line);
-      border-radius: 18px;
-      background: rgba(255, 250, 242, 0.92);
-      backdrop-filter: blur(4px);
-    }}
-    h1, h2 {{ margin: 0 0 12px; }}
-    .muted {{ color: var(--muted); }}
-    .grid {{
-      display: grid;
-      gap: 16px;
-      grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
-    }}
-    .card {{
-      padding: 18px;
-      border: 1px solid var(--line);
-      border-radius: 16px;
-      background: var(--panel);
-      box-shadow: 0 8px 24px rgba(45, 36, 29, 0.06);
-    }}
-    label {{
-      display: block;
-      margin: 10px 0 6px;
-      font-size: 0.92rem;
-      font-weight: 600;
-    }}
-    input, select, textarea, button {{
-      width: 100%;
-      border-radius: 10px;
-      border: 1px solid var(--line);
-      padding: 10px 12px;
-      font: inherit;
-    }}
-    textarea {{ min-height: 110px; resize: vertical; }}
-    .row {{
-      display: grid;
-      gap: 12px;
-      grid-template-columns: repeat(2, minmax(0, 1fr));
-    }}
-    .inline {{
-      display: flex;
-      gap: 10px;
-      align-items: center;
-      margin-top: 12px;
-    }}
-    .inline input[type="checkbox"] {{ width: auto; }}
-    button {{
-      cursor: pointer;
-      font-weight: 700;
-      color: #fff;
-      background: var(--accent);
-      border: none;
-    }}
-    button.alt {{ background: var(--accent-2); }}
-    pre {{
-      overflow: auto;
-      margin: 0;
-      padding: 12px;
-      border-radius: 12px;
-      background: #241f1a;
-      color: #f7efe4;
-      min-height: 140px;
-    }}
-    .actions {{
-      display: flex;
-      gap: 10px;
-      flex-wrap: wrap;
-      margin-top: 12px;
-    }}
-    .actions button {{
-      width: auto;
-      min-width: 140px;
-    }}
-    @media (max-width: 640px) {{
-      .row {{ grid-template-columns: 1fr; }}
-      .actions button {{ width: 100%; }}
-    }}
-  </style>
-</head>
-<body>
-  <main>
-    <section class="hero">
-      <h1>Fichero Printer</h1>
-      <p class="muted">Home Assistant print console for status, text labels, and image uploads.</p>
-      <p class="muted">API docs remain available at <a href="docs">/docs</a>.</p>
-    </section>

-    <section class="grid">
-      <div class="card">
-        <h2>Connection</h2>
-        <label for="address">Printer address</label>
-        <input id="address" value="{default_address}" placeholder="C9:48:8A:69:D5:C0">
+    try:
+        template_path = Path(__file__).parent / "index.html"
+        template = template_path.read_text(encoding="utf-8")
+    except FileNotFoundError:
+        return "<h1>Error: index.html not found</h1>"

-        <div class="row">
-          <div>
-            <label for="transport">Transport</label>
-            <select id="transport">
-              <option value="ble"{" selected" if default_transport == "ble" else ""}>BLE</option>
-              <option value="classic"{" selected" if default_transport == "classic" else ""}>Classic</option>
-            </select>
-          </div>
-          <div>
-            <label for="channel">RFCOMM channel</label>
-            <input id="channel" type="number" min="1" max="30" value="{_DEFAULT_CHANNEL}">
-          </div>
-        </div>
-
-        <div class="actions">
-          <button type="button" class="alt" onclick="runGet('status')">Get Status</button>
-          <button type="button" class="alt" onclick="runGet('info')">Get Info</button>
-        </div>
-      </div>
-
-      <div class="card">
-        <h2>Output</h2>
-        <pre id="output">Ready.</pre>
-      </div>
-
-      <div class="card">
-        <h2>Print Text</h2>
-        <label for="text">Text</label>
-        <textarea id="text" placeholder="Hello from Home Assistant"></textarea>
-        <div class="row">
-          <div>
-            <label for="text_density">Density</label>
-            <select id="text_density">
-              <option value="0">0</option>
-              <option value="1">1</option>
-              <option value="2" selected>2</option>
-            </select>
-          </div>
-          <div>
-            <label for="text_copies">Copies</label>
-            <input id="text_copies" type="number" min="1" max="99" value="1">
-          </div>
-        </div>
-        <div class="row">
-          <div>
-            <label for="text_font_size">Font size</label>
-            <input id="text_font_size" type="number" min="6" max="200" value="30">
-          </div>
-          <div>
-            <label for="text_label_length">Label length (mm)</label>
-            <input id="text_label_length" type="number" min="5" max="500" value="30">
-          </div>
-        </div>
-        <label for="text_paper">Paper</label>
-        <select id="text_paper">
-          <option value="gap" selected>gap</option>
-          <option value="black">black</option>
-          <option value="continuous">continuous</option>
-        </select>
-        <div class="actions">
-          <button type="button" onclick="printText()">Print Text</button>
-        </div>
-      </div>
-
-      <div class="card">
-        <h2>Print Image</h2>
-        <label for="image_file">Image file</label>
-        <input id="image_file" type="file" accept="image/*">
-        <div class="row">
-          <div>
-            <label for="image_density">Density</label>
-            <select id="image_density">
-              <option value="0">0</option>
-              <option value="1">1</option>
-              <option value="2" selected>2</option>
-            </select>
-          </div>
-          <div>
-            <label for="image_copies">Copies</label>
-            <input id="image_copies" type="number" min="1" max="99" value="1">
-          </div>
-        </div>
-        <div class="row">
-          <div>
-            <label for="image_label_length">Label length (mm)</label>
-            <input id="image_label_length" type="number" min="5" max="500" value="30">
-          </div>
-          <div class="inline">
-            <input id="image_dither" type="checkbox" checked>
-            <label for="image_dither">Enable dithering</label>
-          </div>
-        </div>
-        <label for="image_paper">Paper</label>
-        <select id="image_paper">
-          <option value="gap" selected>gap</option>
-          <option value="black">black</option>
-          <option value="continuous">continuous</option>
-        </select>
-        <div class="actions">
-          <button type="button" onclick="printImage()">Print Image</button>
-        </div>
-      </div>
-    </section>
-  </main>
-
-  <script>
-    function commonParams() {{
-      const address = document.getElementById("address").value.trim();
-      const classic = document.getElementById("transport").value === "classic";
-      const channel = document.getElementById("channel").value;
-      const params = new URLSearchParams();
-      if (address) params.set("address", address);
-      params.set("classic", String(classic));
-      params.set("channel", channel);
-      return params;
-    }}
-
-    async function showResponse(response) {{
-      const output = document.getElementById("output");
-      let data;
-      try {{
-        data = await response.json();
-      }} catch {{
-        data = {{ detail: await response.text() }};
-      }}
-      output.textContent = JSON.stringify({{ status: response.status, ok: response.ok, data }}, null, 2);
-    }}
-
-    async function runGet(path) {{
-      const response = await fetch(`${{path}}?${{commonParams().toString()}}`);
-      await showResponse(response);
-    }}
-
-    async function printText() {{
-      const form = new FormData();
-      form.set("text", document.getElementById("text").value);
-      form.set("density", document.getElementById("text_density").value);
-      form.set("copies", document.getElementById("text_copies").value);
-      form.set("font_size", document.getElementById("text_font_size").value);
-      form.set("label_length", document.getElementById("text_label_length").value);
-      form.set("paper", document.getElementById("text_paper").value);
-      form.set("address", document.getElementById("address").value.trim());
-      form.set("classic", String(document.getElementById("transport").value === "classic"));
-      form.set("channel", document.getElementById("channel").value);
-      const response = await fetch("print/text", {{ method: "POST", body: form }});
-      await showResponse(response);
-    }}
-
-    async function printImage() {{
-      const fileInput = document.getElementById("image_file");
-      if (!fileInput.files.length) {{
-        document.getElementById("output").textContent = "Select an image file first.";
-        return;
-      }}
-      const form = new FormData();
-      form.set("file", fileInput.files[0]);
-      form.set("density", document.getElementById("image_density").value);
-      form.set("copies", document.getElementById("image_copies").value);
-      form.set("label_length", document.getElementById("image_label_length").value);
-      form.set("paper", document.getElementById("image_paper").value);
-      form.set("dither", String(document.getElementById("image_dither").checked));
-      form.set("address", document.getElementById("address").value.trim());
-      form.set("classic", String(document.getElementById("transport").value === "classic"));
-      form.set("channel", document.getElementById("channel").value);
-      const response = await fetch("print/image", {{ method: "POST", body: form }});
-      await showResponse(response);
-    }}
-  </script>
-</body>
-</html>"""
+    # Simple substitution for initial values
+    return (
+        template.replace("{default_address}", default_address)
+        .replace("{ble_selected}", " selected" if default_transport == "ble" else "")
+        .replace("{classic_selected}", " selected" if default_transport == "classic" else "")
+        .replace("{default_channel}", str(_DEFAULT_CHANNEL))
+    )


 # ---------------------------------------------------------------------------
@@ -468,6 +190,90 @@ async def get_info(
    return info


+@app.post(
+    "/pair",
+    summary="Pair and trust a Bluetooth device",
+    status_code=200,
+)
+async def pair_device(
+    address: Annotated[str | None, Form(description="Device address (optional, overrides FICHERO_ADDR)")] = None,
+):
+    """
+    Attempt to pair and trust the device using `bluetoothctl`.
+    This is intended for setting up Classic Bluetooth connections.
+    """
+    addr = _address(address)
+    if not addr:
+        raise HTTPException(status_code=422, detail="Address is required to pair.")
+
+    # Basic validation for MAC address format to mitigate injection risk.
+    if not re.match(r"^[0-9A-F]{2}(:[0-9A-F]{2}){5}$", addr, re.IGNORECASE):
+        raise HTTPException(status_code=422, detail=f"Invalid address format: {addr}")
+
+    cmd = f'echo -e "pair {addr}\\ntrust {addr}\\nquit" | bluetoothctl'
+
+    try:
+        proc = await asyncio.create_subprocess_shell(
+            cmd,
+            stdout=asyncio.subprocess.PIPE,
+            stderr=asyncio.subprocess.PIPE,
+        )
+        stdout, stderr = await asyncio.wait_for(proc.communicate(), timeout=15.0)
+    except FileNotFoundError:
+        raise HTTPException(status_code=500, detail="`bluetoothctl` command not found. Is BlueZ installed and in PATH?")
+    except asyncio.TimeoutError:
+        raise HTTPException(status_code=504, detail="`bluetoothctl` command timed out after 15 seconds.")
+
+    output = stdout.decode(errors="ignore")
+    error = stderr.decode(errors="ignore")
+
+    if "Failed to pair" in output or "not available" in output.lower():
+        raise HTTPException(status_code=502, detail=f"Pairing failed. Output: {output}. Error: {error}")
+
+    return {"ok": True, "message": "Pair/trust command sent. Check output for details.", "output": output, "error": error}
+
+
+@app.post(
+    "/unpair",
+    summary="Unpair a Bluetooth device",
+    status_code=200,
+)
+async def unpair_device(
+    address: Annotated[str | None, Form(description="Device address (optional, overrides FICHERO_ADDR)")] = None,
+):
+    """
+    Attempt to unpair the device using `bluetoothctl`.
+    """
+    addr = _address(address)
+    if not addr:
+        raise HTTPException(status_code=422, detail="Address is required to unpair.")
+
+    # Basic validation for MAC address format to mitigate injection risk.
+    if not re.match(r"^[0-9A-F]{2}(:[0-9A-F]{2}){5}$", addr, re.IGNORECASE):
+        raise HTTPException(status_code=422, detail=f"Invalid address format: {addr}")
+
+    cmd = f'echo -e "remove {addr}\\nquit" | bluetoothctl'
+
+    try:
+        proc = await asyncio.create_subprocess_shell(
+            cmd,
+            stdout=asyncio.subprocess.PIPE,
+            stderr=asyncio.subprocess.PIPE,
+        )
+        stdout, stderr = await asyncio.wait_for(proc.communicate(), timeout=15.0)
+    except FileNotFoundError:
+        raise HTTPException(status_code=500, detail="`bluetoothctl` command not found. Is BlueZ installed and in PATH?")
+    except asyncio.TimeoutError:
+        raise HTTPException(status_code=504, detail="`bluetoothctl` command timed out after 15 seconds.")
+
+    output = stdout.decode(errors="ignore")
+    error = stderr.decode(errors="ignore")
+
+    if "Failed to remove" in output or "not available" in output.lower():
+        raise HTTPException(status_code=502, detail=f"Unpairing failed. Output: {output}. Error: {error}")
+
+    return {"ok": True, "message": "Unpair command sent. Check output for details.", "output": output, "error": error}
+
@app.post(
    "/print/text",
    summary="Print a text label",
--- a/fichero/cli.py
+++ b/fichero/cli.py
@@ -1,251 +0,0 @@
-"""CLI for Fichero D11s thermal label printer."""
-
-import argparse
-import asyncio
-import os
-import sys
-
-from PIL import Image
-
-from fichero.imaging import image_to_raster, prepare_image, text_to_image
-from fichero.printer import (
-    BYTES_PER_ROW,
-    DELAY_AFTER_DENSITY,
-    DELAY_AFTER_FEED,
-    DELAY_COMMAND_GAP,
-    DELAY_RASTER_SETTLE,
-    PAPER_GAP,
-    PrinterClient,
-    PrinterError,
-    PrinterNotReady,
-    connect,
-)
-
-DOTS_PER_MM = 8  # 203 DPI
-
-
-def _resolve_label_height(args: argparse.Namespace) -> int:
-    """Return label height in pixels from --label-length (mm) or --label-height (px)."""
-    if args.label_length is not None:
-        return args.label_length * DOTS_PER_MM
-    return args.label_height
-
-
-async def do_print(
-    pc: PrinterClient,
-    img: Image.Image,
-    density: int = 1,
-    paper: int = PAPER_GAP,
-    copies: int = 1,
-    dither: bool = True,
-    max_rows: int = 240,
-) -> bool:
-    img = prepare_image(img, max_rows=max_rows, dither=dither)
-    rows = img.height
-    raster = image_to_raster(img)
-
-    print(f"  Image: {img.width}x{rows}, {len(raster)} bytes, {copies} copies")
-
-    await pc.set_density(density)
-    await asyncio.sleep(DELAY_AFTER_DENSITY)
-
-    for copy_num in range(copies):
-        if copies > 1:
-            print(f"  Copy {copy_num + 1}/{copies}...")
-
-        # Check status before each copy (matches decompiled app behaviour)
-        status = await pc.get_status()
-        if not status.ok:
-            raise PrinterNotReady(f"Printer not ready: {status}")
-
-        # AiYin print sequence (from decompiled APK)
-        await pc.set_paper_type(paper)
-        await asyncio.sleep(DELAY_COMMAND_GAP)
-        await pc.wakeup()
-        await asyncio.sleep(DELAY_COMMAND_GAP)
-        await pc.enable()
-        await asyncio.sleep(DELAY_COMMAND_GAP)
-
-        # Raster image: GS v 0 m xL xH yL yH <data>
-        yl = rows & 0xFF
-        yh = (rows >> 8) & 0xFF
-        header = bytes([0x1D, 0x76, 0x30, 0x00, BYTES_PER_ROW, 0x00, yl, yh])
-        await pc.send_chunked(header + raster)
-
-        await asyncio.sleep(DELAY_RASTER_SETTLE)
-        await pc.form_feed()
-        await asyncio.sleep(DELAY_AFTER_FEED)
-
-        ok = await pc.stop_print()
-        if not ok:
-            print("  WARNING: no OK/0xAA from stop command")
-
-    return True
-
-
-async def cmd_info(args: argparse.Namespace) -> None:
-    async with connect(args.address, classic=args.classic, channel=args.channel) as pc:
-        info = await pc.get_info()
-        for k, v in info.items():
-            print(f"  {k}: {v}")
-
-        print()
-        all_info = await pc.get_all_info()
-        for k, v in all_info.items():
-            print(f"  {k}: {v}")
-
-
-async def cmd_status(args: argparse.Namespace) -> None:
-    async with connect(args.address, classic=args.classic, channel=args.channel) as pc:
-        status = await pc.get_status()
-        print(f"  Status: {status}")
-        print(f"  Raw: 0x{status.raw:02X} ({status.raw:08b})")
-        print(f"  printing={status.printing} cover_open={status.cover_open} "
-              f"no_paper={status.no_paper} low_battery={status.low_battery} "
-              f"overheated={status.overheated} charging={status.charging}")
-
-
-async def cmd_text(args: argparse.Namespace) -> None:
-    text = " ".join(args.text)
-    label_h = _resolve_label_height(args)
-    img = text_to_image(text, font_size=args.font_size, label_height=label_h)
-    async with connect(args.address, classic=args.classic, channel=args.channel) as pc:
-        print(f'Printing "{text}"...')
-        ok = await do_print(pc, img, args.density, paper=args.paper,
-                            copies=args.copies, dither=False, max_rows=label_h)
-        print("Done." if ok else "FAILED.")
-
-
-async def cmd_image(args: argparse.Namespace) -> None:
-    img = Image.open(args.path)
-    label_h = _resolve_label_height(args)
-    async with connect(args.address, classic=args.classic, channel=args.channel) as pc:
-        print(f"Printing {args.path}...")
-        ok = await do_print(pc, img, args.density, paper=args.paper,
-                            copies=args.copies, dither=not args.no_dither,
-                            max_rows=label_h)
-        print("Done." if ok else "FAILED.")
-
-
-async def cmd_set(args: argparse.Namespace) -> None:
-    async with connect(args.address, classic=args.classic, channel=args.channel) as pc:
-        if args.setting == "density":
-            val = int(args.value)
-            if not 0 <= val <= 2:
-                print("  ERROR: density must be 0, 1, or 2")
-                return
-            ok = await pc.set_density(val)
-            print(f"  Set density={args.value}: {'OK' if ok else 'FAILED'}")
-        elif args.setting == "shutdown":
-            val = int(args.value)
-            if not 1 <= val <= 480:
-                print("  ERROR: shutdown must be 1-480 minutes")
-                return
-            ok = await pc.set_shutdown_time(val)
-            print(f"  Set shutdown={args.value}min: {'OK' if ok else 'FAILED'}")
-        elif args.setting == "paper":
-            types = {"gap": 0, "black": 1, "continuous": 2}
-            if args.value in types:
-                val = types[args.value]
-            else:
-                try:
-                    val = int(args.value)
-                except ValueError:
-                    print("  ERROR: paper must be gap, black, continuous, or 0-2")
-                    return
-                if not 0 <= val <= 2:
-                    print("  ERROR: paper must be gap, black, continuous, or 0-2")
-                    return
-            ok = await pc.set_paper_type(val)
-            print(f"  Set paper={args.value}: {'OK' if ok else 'FAILED'}")
-
-
-def _add_paper_arg(parser: argparse.ArgumentParser) -> None:
-    """Add --paper argument to a subparser."""
-    parser.add_argument(
-        "--paper", type=str, default="gap",
-        help="Paper type: gap (default), black, continuous",
-    )
-
-
-def _parse_paper(value: str) -> int:
-    """Convert paper string/int to protocol value."""
-    types = {"gap": 0, "black": 1, "continuous": 2}
-    if value in types:
-        return types[value]
-    try:
-        val = int(value)
-        if 0 <= val <= 2:
-            return val
-    except ValueError:
-        pass
-    print(f"  WARNING: unknown paper type '{value}', using gap")
-    return 0
-
-
-def main() -> None:
-    parser = argparse.ArgumentParser(description="Fichero D11s Label Printer")
-    parser.add_argument("--address", default=os.environ.get("FICHERO_ADDR"),
-                        help="BLE address (skip scanning, or set FICHERO_ADDR)")
-    parser.add_argument("--classic", action="store_true",
-                        default=os.environ.get("FICHERO_TRANSPORT", "").lower() == "classic",
-                        help="Use Classic Bluetooth (RFCOMM) instead of BLE (Linux only, "
-                             "or set FICHERO_TRANSPORT=classic)")
-    parser.add_argument("--channel", type=int, default=1,
-                        help="RFCOMM channel (default: 1, only used with --classic)")
-    sub = parser.add_subparsers(dest="command", required=True)
-
-    p_info = sub.add_parser("info", help="Show device info")
-    p_info.set_defaults(func=cmd_info)
-
-    p_status = sub.add_parser("status", help="Show detailed status")
-    p_status.set_defaults(func=cmd_status)
-
-    p_text = sub.add_parser("text", help="Print text label")
-    p_text.add_argument("text", nargs="+", help="Text to print")
-    p_text.add_argument("--density", type=int, default=2, choices=[0, 1, 2],
-                        help="Print density: 0=light, 1=medium, 2=thick")
-    p_text.add_argument("--copies", type=int, default=1, help="Number of copies")
-    p_text.add_argument("--font-size", type=int, default=30, help="Font size in points")
-    p_text.add_argument("--label-length", type=int, default=None,
-                        help="Label length in mm (default: 30mm)")
-    p_text.add_argument("--label-height", type=int, default=240,
-                        help="Label height in pixels (default: 240, prefer --label-length)")
-    _add_paper_arg(p_text)
-    p_text.set_defaults(func=cmd_text)
-
-    p_image = sub.add_parser("image", help="Print image file")
-    p_image.add_argument("path", help="Path to image file")
-    p_image.add_argument("--density", type=int, default=2, choices=[0, 1, 2],
-                         help="Print density: 0=light, 1=medium, 2=thick")
-    p_image.add_argument("--copies", type=int, default=1, help="Number of copies")
-    p_image.add_argument("--no-dither", action="store_true",
-                         help="Disable Floyd-Steinberg dithering (use simple threshold)")
-    p_image.add_argument("--label-length", type=int, default=None,
-                         help="Label length in mm (default: 30mm)")
-    p_image.add_argument("--label-height", type=int, default=240,
-                         help="Max image height in pixels (default: 240, prefer --label-length)")
-    _add_paper_arg(p_image)
-    p_image.set_defaults(func=cmd_image)
-
-    p_set = sub.add_parser("set", help="Change printer settings")
-    p_set.add_argument("setting", choices=["density", "shutdown", "paper"],
-                       help="Setting to change")
-    p_set.add_argument("value", help="New value")
-    p_set.set_defaults(func=cmd_set)
-
-    args = parser.parse_args()
-
-    # Resolve --paper string to int for print commands
-    if hasattr(args, "paper") and isinstance(args.paper, str):
-        args.paper = _parse_paper(args.paper)
-
-    try:
-        asyncio.run(args.func(args))
-    except PrinterError as e:
-        print(f"  ERROR: {e}", file=sys.stderr)
-        sys.exit(1)
-
-
-if __name__ == "__main__":
-    main()
--- a/fichero/imaging.py
+++ b/fichero/imaging.py
@@ -1,97 +0,0 @@
-"""Image processing for Fichero D11s thermal label printer."""
-
-import logging
-
-import numpy as np
-from PIL import Image, ImageDraw, ImageFont, ImageOps
-
-from fichero.printer import PRINTHEAD_PX
-
-log = logging.getLogger(__name__)
-
-
-def floyd_steinberg_dither(img: Image.Image) -> Image.Image:
-    """Floyd-Steinberg error-diffusion dithering to 1-bit.
-
-    Same algorithm as PrinterImageProcessor.ditherFloydSteinberg() in the
-    decompiled Fichero APK: distributes quantisation error to neighbouring
-    pixels with weights 7/16, 3/16, 5/16, 1/16.
-    """
-    arr = np.array(img, dtype=np.float32)
-    h, w = arr.shape
-
-    for y in range(h):
-        for x in range(w):
-            old = arr[y, x]
-            new = 0.0 if old < 128 else 255.0
-            arr[y, x] = new
-            err = old - new
-            if x + 1 < w:
-                arr[y, x + 1] += err * 7 / 16
-            if y + 1 < h:
-                if x - 1 >= 0:
-                    arr[y + 1, x - 1] += err * 3 / 16
-                arr[y + 1, x] += err * 5 / 16
-                if x + 1 < w:
-                    arr[y + 1, x + 1] += err * 1 / 16
-
-    arr = np.clip(arr, 0, 255).astype(np.uint8)
-    return Image.fromarray(arr, mode="L")
-
-
-def prepare_image(
-    img: Image.Image, max_rows: int = 240, dither: bool = True
-) -> Image.Image:
-    """Convert any image to 96px wide, 1-bit, black on white.
-
-    When *dither* is True (default), uses Floyd-Steinberg error diffusion
-    for better quality on photos and gradients.  Set False for crisp text.
-    """
-    img = img.convert("L")
-    w, h = img.size
-    new_h = int(h * (PRINTHEAD_PX / w))
-    img = img.resize((PRINTHEAD_PX, new_h), Image.LANCZOS)
-
-    if new_h > max_rows:
-        log.warning("Image height %dpx exceeds max %dpx, cropping bottom", new_h, max_rows)
-        img = img.crop((0, 0, PRINTHEAD_PX, max_rows))
-
-    img = ImageOps.autocontrast(img, cutoff=1)
-
-    if dither:
-        img = floyd_steinberg_dither(img)
-
-    # Pack to 1-bit.  PIL mode "1" tobytes() uses 0-bit=black, 1-bit=white,
-    # but the printer wants 1-bit=black.  Mapping dark->1 via point() inverts
-    # the PIL convention so the final packed bits match what the printer needs.
-    img = img.point(lambda x: 1 if x < 128 else 0, "1")
-    return img
-
-
-def image_to_raster(img: Image.Image) -> bytes:
-    """Pack 1-bit image into raw raster bytes, MSB first."""
-    if img.mode != "1":
-        raise ValueError(f"Expected mode '1', got '{img.mode}'")
-    if img.width != PRINTHEAD_PX:
-        raise ValueError(f"Expected width {PRINTHEAD_PX}, got {img.width}")
-    return img.tobytes()
-
-
-def text_to_image(text: str, font_size: int = 30, label_height: int = 240) -> Image.Image:
-    """Render crisp 1-bit text, rotated 90 degrees for label printing."""
-    canvas_w = label_height
-    canvas_h = PRINTHEAD_PX
-    img = Image.new("L", (canvas_w, canvas_h), 255)
-    draw = ImageDraw.Draw(img)
-    draw.fontmode = "1"  # disable antialiasing - pure 1-bit glyph rendering
-
-    font = ImageFont.load_default(size=font_size)
-
-    bbox = draw.textbbox((0, 0), text, font=font)
-    tw, th = bbox[2] - bbox[0], bbox[3] - bbox[1]
-    x = (canvas_w - tw) // 2 - bbox[0]
-    y = (canvas_h - th) // 2 - bbox[1]
-    draw.text((x, y), text, fill=0, font=font)
-
-    img = img.rotate(90, expand=True)
-    return img
--- a/fichero/printer.py
+++ b/fichero/printer.py
@@ -1,467 +0,0 @@
-"""
-Fichero / D11s thermal label printer - BLE + Classic Bluetooth interface.
-
-Protocol reverse-engineered from decompiled Fichero APK (com.lj.fichero).
-Device class: AiYinNormalDevice (LuckPrinter SDK)
-96px wide printhead (12 bytes/row), 203 DPI, prints 1-bit raster images.
-"""
-
-import asyncio
-import sys
-from collections.abc import AsyncGenerator
-from contextlib import asynccontextmanager
-
-from bleak import BleakClient, BleakGATTCharacteristic, BleakScanner
-from bleak.exc import BleakDBusError, BleakError
-
-# --- RFCOMM (Classic Bluetooth) support - Linux + Windows (Python 3.9+) ---
-
-_RFCOMM_AVAILABLE = False
-if sys.platform in ("linux", "win32"):
-    import socket as _socket
-
-    _RFCOMM_AVAILABLE = hasattr(_socket, "AF_BLUETOOTH")
-
-RFCOMM_CHANNEL = 1
-
-# --- BLE identifiers ---
-
-PRINTER_NAME_PREFIXES = ("FICHERO", "D11s_")
-
-# Using the 18f0 service (any of the four BLE UART services work)
-WRITE_UUID = "00002af1-0000-1000-8000-00805f9b34fb"
-NOTIFY_UUID = "00002af0-0000-1000-8000-00805f9b34fb"
-
-# --- Printhead ---
-
-PRINTHEAD_PX = 96
-BYTES_PER_ROW = PRINTHEAD_PX // 8  # 12
-CHUNK_SIZE_BLE = 200        # BLE MTU-limited
-CHUNK_SIZE_CLASSIC = 16384  # from decompiled app (C1703d.java), stream-based
-
-# --- Paper types for 10 FF 84 nn ---
-
-PAPER_GAP = 0x00
-PAPER_BLACK_MARK = 0x01
-PAPER_CONTINUOUS = 0x02
-
-# --- Timing (seconds) - empirically tuned against D11s fw 2.4.6 ---
-
-DELAY_AFTER_DENSITY = 0.10   # printer needs time to apply density setting
-DELAY_COMMAND_GAP = 0.05     # minimum gap between sequential commands
-DELAY_CHUNK_GAP = 0.02       # inter-chunk pacing for BLE throughput
-DELAY_RASTER_SETTLE = 0.50   # wait for printhead after raster transfer
-DELAY_AFTER_FEED = 0.30      # wait after form feed before stop command
-DELAY_NOTIFY_EXTRA = 0.05    # extra wait for trailing BLE notification fragments
-BLE_CONNECT_RETRIES = 3      # retry transient BLE connect failures
-BLE_CONNECT_BACKOFF = 0.7    # base backoff in seconds (linear: n * base)
-
-
-# --- Exceptions ---
-
-
-class PrinterError(Exception):
-    """Base exception for printer operations."""
-
-
-class PrinterNotFound(PrinterError):
-    """No Fichero/D11s printer found during BLE scan."""
-
-
-class PrinterTimeout(PrinterError):
-    """Printer did not respond within the expected time."""
-
-
-class PrinterNotReady(PrinterError):
-    """Printer status indicates it cannot print."""
-
-
-# --- Discovery ---
-
-
-async def find_printer() -> str:
-    """Scan BLE for a Fichero/D11s printer. Returns the address."""
-    print("Scanning for printer...")
-    devices = await BleakScanner.discover(timeout=8)
-    for d in devices:
-        if d.name and any(d.name.startswith(p) for p in PRINTER_NAME_PREFIXES):
-            print(f"  Found {d.name} at {d.address}")
-            return d.address
-    raise PrinterNotFound("No Fichero/D11s printer found. Is it turned on?")
-
-
-async def resolve_ble_target(address: str | None = None):
-    """Resolve a BLE target as Bleak device object when possible.
-
-    Passing a discovered device object to BleakClient helps BlueZ keep the
-    correct LE context for dual-mode environments.
-    """
-    if address:
-        device = await BleakScanner.find_device_by_address(address, timeout=8.0)
-        return device or address
-    devices = await BleakScanner.discover(timeout=8)
-    for d in devices:
-        if d.name and any(d.name.startswith(p) for p in PRINTER_NAME_PREFIXES):
-            print(f"  Found {d.name} at {d.address}")
-            return d
-    raise PrinterNotFound("No Fichero/D11s printer found. Is it turned on?")
-
-
-# --- Status ---
-
-
-class PrinterStatus:
-    """Parsed status byte from 10 FF 40."""
-
-    def __init__(self, byte: int):
-        self.raw = byte
-        self.printing = bool(byte & 0x01)
-        self.cover_open = bool(byte & 0x02)
-        self.no_paper = bool(byte & 0x04)
-        self.low_battery = bool(byte & 0x08)
-        self.overheated = bool(byte & 0x10 or byte & 0x40)
-        self.charging = bool(byte & 0x20)
-
-    def __str__(self) -> str:
-        flags = []
-        if self.printing:
-            flags.append("printing")
-        if self.cover_open:
-            flags.append("cover open")
-        if self.no_paper:
-            flags.append("no paper")
-        if self.low_battery:
-            flags.append("low battery")
-        if self.overheated:
-            flags.append("overheated")
-        if self.charging:
-            flags.append("charging")
-        return ", ".join(flags) if flags else "ready"
-
-    @property
-    def ok(self) -> bool:
-        return not (self.cover_open or self.no_paper or self.overheated)
-
-
-# --- RFCOMM client (duck-types the BleakClient interface) ---
-
-
-class RFCOMMClient:
-    """Classic Bluetooth (RFCOMM) transport. Linux + Windows (Python 3.9+).
-
-    Implements the same async context manager + write_gatt_char/start_notify
-    interface that PrinterClient expects from BleakClient.  Zero dependencies
-    beyond stdlib.
-    """
-
-    is_classic = True  # transport marker for PrinterClient chunk sizing
-
-    def __init__(self, address: str, channel: int = RFCOMM_CHANNEL):
-        self._address = address
-        self._channel = channel
-        self._sock: "_socket.socket | None" = None
-        self._reader_task: asyncio.Task | None = None
-
-    async def __aenter__(self) -> "RFCOMMClient":
-        if not _RFCOMM_AVAILABLE:
-            raise PrinterError(
-                "RFCOMM transport requires socket.AF_BLUETOOTH "
-                "(Linux with BlueZ, or Windows with Python 3.9+). "
-                "Not available on this platform."
-            )
-        import socket as _socket
-
-        sock = _socket.socket(
-            _socket.AF_BLUETOOTH, _socket.SOCK_STREAM, _socket.BTPROTO_RFCOMM
-        )
-        loop = asyncio.get_running_loop()
-        try:
-            # uvloop's sock_connect path goes through getaddrinfo and doesn't
-            # support AF_BLUETOOTH addresses reliably. Use direct socket connect
-            # in a thread instead.
-            sock.settimeout(10.0)
-            await loop.run_in_executor(
-                None,
-                sock.connect,
-                (self._address, self._channel),
-            )
-            sock.setblocking(False)
-        except asyncio.TimeoutError as exc:
-            sock.close()
-            raise PrinterTimeout(
-                f"Classic Bluetooth connection timed out to {self._address} (channel {self._channel})."
-            ) from exc
-        except OSError as exc:
-            sock.close()
-            raise PrinterError(
-                f"Classic Bluetooth connection failed for '{self._address}' (channel {self._channel}): {exc}"
-            ) from exc
-        except Exception:
-            sock.close()
-            raise
-        self._sock = sock
-        return self
-
-    async def __aexit__(self, *exc) -> None:
-        if self._reader_task is not None:
-            self._reader_task.cancel()
-            try:
-                await self._reader_task
-            except asyncio.CancelledError:
-                pass
-            self._reader_task = None
-        if self._sock is not None:
-            self._sock.close()
-            self._sock = None
-
-    async def write_gatt_char(self, _uuid: str, data: bytes, response: bool = False) -> None:
-        loop = asyncio.get_running_loop()
-        await loop.sock_sendall(self._sock, data)
-
-    async def start_notify(self, _uuid: str, callback) -> None:
-        self._reader_task = asyncio.create_task(self._reader_loop(callback))
-
-    async def _reader_loop(self, callback) -> None:
-        loop = asyncio.get_running_loop()
-        while True:
-            try:
-                data = await loop.sock_recv(self._sock, 1024)
-            except (OSError, asyncio.CancelledError):
-                return
-            if not data:
-                return
-            callback(None, bytearray(data))
-
-
-# --- Client ---
-
-
-class PrinterClient:
-    def __init__(self, client: BleakClient):
-        self.client = client
-        self._buf = bytearray()
-        self._event = asyncio.Event()
-        self._lock = asyncio.Lock()
-        self._is_classic = getattr(client, "is_classic", False)
-
-    def _on_notify(self, _char: BleakGATTCharacteristic, data: bytearray) -> None:
-        self._buf.extend(data)
-        self._event.set()
-
-    async def start(self) -> None:
-        await self.client.start_notify(NOTIFY_UUID, self._on_notify)
-
-    async def send(self, data: bytes, wait: bool = False, timeout: float = 2.0) -> bytes:
-        async with self._lock:
-            if wait:
-                self._buf.clear()
-                self._event.clear()
-            await self.client.write_gatt_char(WRITE_UUID, data, response=False)
-            if wait:
-                try:
-                    await asyncio.wait_for(self._event.wait(), timeout=timeout)
-                    await asyncio.sleep(DELAY_NOTIFY_EXTRA)
-                except asyncio.TimeoutError:
-                    raise PrinterTimeout(f"No response within {timeout}s")
-            return bytes(self._buf)
-
-    async def send_chunked(self, data: bytes, chunk_size: int | None = None) -> None:
-        if chunk_size is None:
-            chunk_size = CHUNK_SIZE_CLASSIC if self._is_classic else CHUNK_SIZE_BLE
-        delay = 0 if self._is_classic else DELAY_CHUNK_GAP
-        async with self._lock:
-            for i in range(0, len(data), chunk_size):
-                chunk = data[i : i + chunk_size]
-                await self.client.write_gatt_char(WRITE_UUID, chunk, response=False)
-                if delay:
-                    await asyncio.sleep(delay)
-
-    # --- Info commands (all tested and confirmed on D11s fw 2.4.6) ---
-
-    async def get_model(self) -> str:
-        r = await self.send(bytes([0x10, 0xFF, 0x20, 0xF0]), wait=True)
-        return r.decode(errors="replace").strip() if r else "?"
-
-    async def get_firmware(self) -> str:
-        r = await self.send(bytes([0x10, 0xFF, 0x20, 0xF1]), wait=True)
-        return r.decode(errors="replace").strip() if r else "?"
-
-    async def get_serial(self) -> str:
-        r = await self.send(bytes([0x10, 0xFF, 0x20, 0xF2]), wait=True)
-        return r.decode(errors="replace").strip() if r else "?"
-
-    async def get_boot_version(self) -> str:
-        r = await self.send(bytes([0x10, 0xFF, 0x20, 0xEF]), wait=True)
-        return r.decode(errors="replace").strip() if r else "?"
-
-    async def get_battery(self) -> int:
-        r = await self.send(bytes([0x10, 0xFF, 0x50, 0xF1]), wait=True)
-        if r and len(r) >= 2:
-            return r[-1]
-        return -1
-
-    async def get_status(self) -> PrinterStatus:
-        r = await self.send(bytes([0x10, 0xFF, 0x40]), wait=True)
-        if r:
-            return PrinterStatus(r[-1])
-        return PrinterStatus(0xFF)
-
-    async def get_density(self) -> bytes:
-        r = await self.send(bytes([0x10, 0xFF, 0x11]), wait=True)
-        return r
-
-    async def get_shutdown_time(self) -> int:
-        """Returns auto-shutdown timeout in minutes."""
-        r = await self.send(bytes([0x10, 0xFF, 0x13]), wait=True)
-        if r and len(r) >= 2:
-            return (r[0] << 8) | r[1]
-        return -1
-
-    async def get_all_info(self) -> dict:
-        """10 FF 70: returns pipe-delimited string with all device info."""
-        r = await self.send(bytes([0x10, 0xFF, 0x70]), wait=True)
-        if not r:
-            return {}
-        parts = r.decode(errors="replace").split("|")
-        if len(parts) >= 6:
-            return {
-                "bt_name": parts[0],
-                "mac_classic": parts[1],
-                "mac_ble": parts[2],
-                "firmware": parts[3],
-                "serial": parts[4],
-                "battery": f"{parts[5]}%",
-            }
-        return {"raw": r.decode(errors="replace")}
-
-    # --- Config commands (tested on D11s) ---
-
-    async def set_density(self, level: int) -> bool:
-        """0=light, 1=medium, 2=thick. Returns True if printer responded OK."""
-        r = await self.send(bytes([0x10, 0xFF, 0x10, 0x00, level]), wait=True)
-        return r == b"OK"
-
-    async def set_paper_type(self, paper: int = PAPER_GAP) -> bool:
-        """0=gap/label, 1=black mark, 2=continuous."""
-        r = await self.send(bytes([0x10, 0xFF, 0x84, paper]), wait=True)
-        return r == b"OK"
-
-    async def set_shutdown_time(self, minutes: int) -> bool:
-        hi = (minutes >> 8) & 0xFF
-        lo = minutes & 0xFF
-        r = await self.send(bytes([0x10, 0xFF, 0x12, hi, lo]), wait=True)
-        return r == b"OK"
-
-    async def factory_reset(self) -> bool:
-        r = await self.send(bytes([0x10, 0xFF, 0x04]), wait=True)
-        return r == b"OK"
-
-    # --- Print control (AiYin-specific, from decompiled APK) ---
-
-    async def wakeup(self) -> None:
-        await self.send(b"\x00" * 12)
-
-    async def enable(self) -> None:
-        """AiYin enable: 10 FF FE 01 (NOT 10 FF F1 03)."""
-        await self.send(bytes([0x10, 0xFF, 0xFE, 0x01]))
-
-    async def feed_dots(self, dots: int) -> None:
-        """Feed paper forward by n dots."""
-        await self.send(bytes([0x1B, 0x4A, dots & 0xFF]))
-
-    async def form_feed(self) -> None:
-        """Position to next label."""
-        await self.send(bytes([0x1D, 0x0C]))
-
-    async def stop_print(self) -> bool:
-        """AiYin stop: 10 FF FE 45. Waits for 0xAA or 'OK'."""
-        r = await self.send(bytes([0x10, 0xFF, 0xFE, 0x45]), wait=True, timeout=60.0)
-        if r:
-            return r[0] == 0xAA or r.startswith(b"OK")
-        return False
-
-    async def get_info(self) -> dict:
-        status = await self.get_status()
-        return {
-            "model": await self.get_model(),
-            "firmware": await self.get_firmware(),
-            "boot": await self.get_boot_version(),
-            "serial": await self.get_serial(),
-            "battery": f"{await self.get_battery()}%",
-            "status": str(status),
-            "shutdown": f"{await self.get_shutdown_time()} min",
-        }
-
-
-@asynccontextmanager
-async def connect(
-    address: str | None = None,
-    classic: bool = False,
-    channel: int = RFCOMM_CHANNEL,
-) -> AsyncGenerator[PrinterClient, None]:
-    """Discover printer, connect, and yield a ready PrinterClient."""
-    if classic:
-        if not address:
-            raise PrinterError("--address is required for Classic Bluetooth (no scanning)")
-        # D11s variants are commonly exposed on channel 1 or 3.
-        candidates = [channel, 1, 2, 3]
-        channels = [ch for i, ch in enumerate(candidates) if ch > 0 and ch not in candidates[:i]]
-        last_exc: Exception | None = None
-        for ch in channels:
-            try:
-                async with RFCOMMClient(address, ch) as client:
-                    pc = PrinterClient(client)
-                    await pc.start()
-                    yield pc
-                    return
-            except (PrinterError, PrinterTimeout) as exc:
-                last_exc = exc
-        if last_exc is not None:
-            raise PrinterError(
-                f"Classic Bluetooth connection failed for '{address}'. "
-                f"Tried channels: {channels}. Last error: {last_exc}"
-            ) from last_exc
-        raise PrinterError(f"Classic Bluetooth connection failed for '{address}'.")
-    else:
-        target = await resolve_ble_target(address)
-        def _is_retryable_ble_error(exc: Exception) -> bool:
-            msg = str(exc).lower()
-            return any(token in msg for token in ("timeout", "timed out", "br-connection-timeout"))
-
-        last_exc: Exception | None = None
-        for attempt in range(1, BLE_CONNECT_RETRIES + 1):
-            try:
-                async with BleakClient(target) as client:
-                    pc = PrinterClient(client)
-                    await pc.start()
-                    yield pc
-                    return
-            except asyncio.TimeoutError as exc:
-                last_exc = exc
-                if attempt < BLE_CONNECT_RETRIES:
-                    await asyncio.sleep(BLE_CONNECT_BACKOFF * attempt)
-                    continue
-                raise PrinterError(f"BLE connection timed out: {exc}") from exc
-            except BleakDBusError as exc:
-                msg = str(exc).lower()
-                if "br-connection-not-supported" in msg:
-                    raise PrinterError(
-                        "BLE connection failed (br-connection-not-supported). "
-                        "Try Classic Bluetooth with classic=true and channel=1."
-                    ) from exc
-                last_exc = exc
-                if _is_retryable_ble_error(exc) and attempt < BLE_CONNECT_RETRIES:
-                    await asyncio.sleep(BLE_CONNECT_BACKOFF * attempt)
-                    continue
-                raise PrinterError(f"BLE connection failed: {exc}") from exc
-            except BleakError as exc:
-                last_exc = exc
-                if _is_retryable_ble_error(exc) and attempt < BLE_CONNECT_RETRIES:
-                    await asyncio.sleep(BLE_CONNECT_BACKOFF * attempt)
-                    continue
-                raise PrinterError(f"BLE error: {exc}") from exc
-        if last_exc is not None:
-            raise PrinterError(
-                f"BLE connection failed after {BLE_CONNECT_RETRIES} attempts: {last_exc}"
-            ) from last_exc
-        raise PrinterError("BLE connection failed for unknown reason.")
--- a/fichero_printer/CHANGELOG.md
+++ b/fichero_printer/CHANGELOG.md
@@ -1,5 +1,52 @@
 # Changelog

+## 0.1.27
+- The `fichero` library is now part of the add-on directory, simplifying the build process and removing the need for synchronization scripts.
+
+## 0.1.24
+
+- Fixed Docker build failures by reverting to a vendored code approach. The add-on now expects the `fichero` library to be present within its directory during the build.
+
+## 0.1.23
+
+- Updated `Dockerfile` to install the main library via `pip` instead of copying source files, completing the refactoring to eliminate duplicated code.
+
+## 0.1.22
+
+- Refactored build process to install the main `fichero-printer` library as a package instead of using duplicated source files. This resolves issues with stale code.
+
+## 0.1.21
+
+- Fixed stale source code issue by synchronizing the add-on's internal `fichero` package with the latest library version.
+
+## 0.1.20
+
+- Refactored the embedded web UI to be loaded from an external `index.html` file.
+
+## 0.1.19
+
+- Added "Unpair Device" button to the web UI.
+
+## 0.1.18
+
+- Added "Pair Device" button to the web UI.
+
+## 0.1.16
+
+- Added automatic fallback to BLE if Classic Bluetooth fails with `[Errno 12] Out of memory`.
+
+## 0.1.15
+
+- Added a BLE recovery retry for `br-connection-not-supported` that forces fresh LE target resolution from scan results before failing.
+
+## 0.1.14
+
+- Prevented BLE fallback to raw MAC connects and now require discovered LE device resolution, reducing `br-connection-not-supported` regressions on some BlueZ hosts.
+
+## 0.1.13
+
+- Marked BLE service-discovery disconnect errors as retryable (`failed to discover services, device disconnected`), so the add-on retries automatically.
+
 ## 0.1.12

 - Improved BLE connection target resolution by preferring discovered BLE device objects over raw MAC strings to avoid BlueZ `br-connection-not-supported` on some hosts.
--- a/fichero_printer/Dockerfile
+++ b/fichero_printer/Dockerfile
@@ -1,28 +1,32 @@
 ARG BUILD_FROM
 FROM $BUILD_FROM

-# Only dbus-dev needed to talk to the HOST BlueZ via D-Bus (host_dbus: true).
+# Install system dependencies.
+# build-base is for compiling Python packages (numpy, pillow).
+# dbus-dev is for Bleak to communicate with the host's BlueZ.
 # Do NOT install bluez here - we use the host BlueZ, not our own.
 RUN apk add --no-cache \
    bash \
    python3 \
    py3-pip \
-    py3-numpy \
-    py3-pillow \
-    dbus-dev
+    dbus-dev \
+    build-base

-# Pure-Python packages (bleak uses dbus-fast internally, no C compiler needed)
+# Install Python dependencies from pip.
+# We cannot use `pip install .` from pyproject.toml as it's outside the build context.
 RUN pip3 install --no-cache-dir --break-system-packages \
-    "bleak>=0.21" \
-    "fastapi>=0.111" \
-    "uvicorn[standard]>=0.29" \
+    "bleak" \
+    "numpy" \
+    "Pillow" \
+    "fastapi" \
+    "uvicorn[standard]" \
    "python-multipart>=0.0.9"

-# Copy the fichero Python package into the container
+# Copy the application code into the container.
 WORKDIR /app
 COPY fichero/ /app/fichero/

-# Make the package importable without installation
+# Make the 'fichero' package importable.
 ENV PYTHONPATH=/app

 # Copy startup script and normalise line endings (Windows CRLF -> LF)
--- a/fichero_printer/config.yaml
+++ b/fichero_printer/config.yaml
@@ -1,5 +1,5 @@
 name: "Fichero Printer"
-version: "0.1.12"
+version: "0.1.27"
 slug: "fichero_printer"
 description: "REST API for the Fichero D11s (AiYin) thermal label printer over Bluetooth"
 url: "https://git.leuschner.dev/Tobias/Fichero"
--- a/fichero_printer/fichero/api.py
+++ b/fichero_printer/fichero/api.py
@@ -5,6 +5,7 @@ Start with:
 or:
    python -m fichero.api

+
 Endpoints:
    GET  /status           – Printer status
    GET  /info             – Printer info (model, firmware, battery, …)
@@ -17,8 +18,10 @@ from __future__ import annotations
 import argparse
 import asyncio
 import io
+import re
 import os
 from contextlib import asynccontextmanager
+from pathlib import Path
 from typing import Annotated

 from fastapi import FastAPI, File, Form, HTTPException, UploadFile
@@ -35,7 +38,6 @@ from fichero.printer import (
    PrinterNotFound,
    PrinterTimeout,
    connect,
-    find_printer,
 )

 # ---------------------------------------------------------------------------
@@ -73,7 +75,7 @@ async def lifespan(app: FastAPI):  # noqa: ARG001
 app = FastAPI(
    title="Fichero Printer API",
    description="REST API for the Fichero D11s (AiYin) thermal label printer.",
-    version="0.1.9",
+    version="0.1.26",
    lifespan=lifespan,
    docs_url=None,
    redoc_url=None,
@@ -95,327 +97,20 @@ def _address(address: str | None) -> str | None:
 def _ui_html() -> str:
    default_address = _DEFAULT_ADDRESS or ""
    default_transport = "classic" if _DEFAULT_CLASSIC else "ble"
-    return f"""<!doctype html>
-<html lang="en">
-<head>
-  <meta charset="utf-8">
-  <meta name="viewport" content="width=device-width, initial-scale=1">
-  <title>Fichero Printer</title>
-  <style>
-    :root {{
-      --bg: #f4efe6;
-      --panel: #fffaf2;
-      --line: #d8cdbd;
-      --ink: #2d241d;
-      --muted: #6c6258;
-      --accent: #b55e33;
-      --accent-2: #245b4b;
-    }}
-    * {{ box-sizing: border-box; }}
-    body {{
-      margin: 0;
-      font-family: "Noto Sans", system-ui, sans-serif;
-      color: var(--ink);
-      background:
-        radial-gradient(circle at top left, #fff8ed 0, transparent 35%),
-        linear-gradient(180deg, #efe4d3 0%, var(--bg) 100%);
-    }}
-    main {{
-      max-width: 980px;
-      margin: 0 auto;
-      padding: 24px 16px 40px;
-    }}
-    .hero {{
-      margin-bottom: 20px;
-      padding: 24px;
-      border: 1px solid var(--line);
-      border-radius: 18px;
-      background: rgba(255, 250, 242, 0.92);
-      backdrop-filter: blur(4px);
-    }}
-    h1, h2 {{ margin: 0 0 12px; }}
-    .muted {{ color: var(--muted); }}
-    .grid {{
-      display: grid;
-      gap: 16px;
-      grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
-    }}
-    .card {{
-      padding: 18px;
-      border: 1px solid var(--line);
-      border-radius: 16px;
-      background: var(--panel);
-      box-shadow: 0 8px 24px rgba(45, 36, 29, 0.06);
-    }}
-    label {{
-      display: block;
-      margin: 10px 0 6px;
-      font-size: 0.92rem;
-      font-weight: 600;
-    }}
-    input, select, textarea, button {{
-      width: 100%;
-      border-radius: 10px;
-      border: 1px solid var(--line);
-      padding: 10px 12px;
-      font: inherit;
-    }}
-    textarea {{ min-height: 110px; resize: vertical; }}
-    .row {{
-      display: grid;
-      gap: 12px;
-      grid-template-columns: repeat(2, minmax(0, 1fr));
-    }}
-    .inline {{
-      display: flex;
-      gap: 10px;
-      align-items: center;
-      margin-top: 12px;
-    }}
-    .inline input[type="checkbox"] {{ width: auto; }}
-    button {{
-      cursor: pointer;
-      font-weight: 700;
-      color: #fff;
-      background: var(--accent);
-      border: none;
-    }}
-    button.alt {{ background: var(--accent-2); }}
-    pre {{
-      overflow: auto;
-      margin: 0;
-      padding: 12px;
-      border-radius: 12px;
-      background: #241f1a;
-      color: #f7efe4;
-      min-height: 140px;
-    }}
-    .actions {{
-      display: flex;
-      gap: 10px;
-      flex-wrap: wrap;
-      margin-top: 12px;
-    }}
-    .actions button {{
-      width: auto;
-      min-width: 140px;
-    }}
-    @media (max-width: 640px) {{
-      .row {{ grid-template-columns: 1fr; }}
-      .actions button {{ width: 100%; }}
-    }}
-  </style>
-</head>
-<body>
-  <main>
-    <section class="hero">
-      <h1>Fichero Printer</h1>
-      <p class="muted">Home Assistant print console for status, text labels, and image uploads.</p>
-      <p class="muted">API docs remain available at <a href="docs">/docs</a>.</p>
-    </section>

-    <section class="grid">
-      <div class="card">
-        <h2>Connection</h2>
-        <label for="address">Printer address</label>
-        <div style="display:flex;gap:8px;align-items:center">
-          <input id="address" value="{default_address}" placeholder="C9:48:8A:69:D5:C0" style="flex:1;width:auto">
-          <button type="button" id="scan-btn" class="alt" style="width:auto;white-space:nowrap" onclick="scanAddress()">&#128268; Scan</button>
-        </div>
+    try:
+        template_path = Path(__file__).parent / "index.html"
+        template = template_path.read_text(encoding="utf-8")
+    except FileNotFoundError:
+        return "<h1>Error: index.html not found</h1>"

-        <div class="row">
-          <div>
-            <label for="transport">Transport</label>
-            <select id="transport">
-              <option value="ble"{" selected" if default_transport == "ble" else ""}>BLE</option>
-              <option value="classic"{" selected" if default_transport == "classic" else ""}>Classic</option>
-            </select>
-          </div>
-          <div>
-            <label for="channel">RFCOMM channel</label>
-            <input id="channel" type="number" min="1" max="30" value="{_DEFAULT_CHANNEL}">
-          </div>
-        </div>
-
-        <div class="actions">
-          <button type="button" class="alt" onclick="runGet('status')">Get Status</button>
-          <button type="button" class="alt" onclick="runGet('info')">Get Info</button>
-        </div>
-      </div>
-
-      <div class="card">
-        <h2>Output</h2>
-        <pre id="output">Ready.</pre>
-      </div>
-
-      <div class="card">
-        <h2>Print Text</h2>
-        <label for="text">Text</label>
-        <textarea id="text" placeholder="Hello from Home Assistant"></textarea>
-        <div class="row">
-          <div>
-            <label for="text_density">Density</label>
-            <select id="text_density">
-              <option value="0">0</option>
-              <option value="1">1</option>
-              <option value="2" selected>2</option>
-            </select>
-          </div>
-          <div>
-            <label for="text_copies">Copies</label>
-            <input id="text_copies" type="number" min="1" max="99" value="1">
-          </div>
-        </div>
-        <div class="row">
-          <div>
-            <label for="text_font_size">Font size</label>
-            <input id="text_font_size" type="number" min="6" max="200" value="30">
-          </div>
-          <div>
-            <label for="text_label_length">Label length (mm)</label>
-            <input id="text_label_length" type="number" min="5" max="500" value="30">
-          </div>
-        </div>
-        <label for="text_paper">Paper</label>
-        <select id="text_paper">
-          <option value="gap" selected>gap</option>
-          <option value="black">black</option>
-          <option value="continuous">continuous</option>
-        </select>
-        <div class="actions">
-          <button type="button" onclick="printText()">Print Text</button>
-        </div>
-      </div>
-
-      <div class="card">
-        <h2>Print Image</h2>
-        <label for="image_file">Image file</label>
-        <input id="image_file" type="file" accept="image/*">
-        <div class="row">
-          <div>
-            <label for="image_density">Density</label>
-            <select id="image_density">
-              <option value="0">0</option>
-              <option value="1">1</option>
-              <option value="2" selected>2</option>
-            </select>
-          </div>
-          <div>
-            <label for="image_copies">Copies</label>
-            <input id="image_copies" type="number" min="1" max="99" value="1">
-          </div>
-        </div>
-        <div class="row">
-          <div>
-            <label for="image_label_length">Label length (mm)</label>
-            <input id="image_label_length" type="number" min="5" max="500" value="30">
-          </div>
-          <div class="inline">
-            <input id="image_dither" type="checkbox" checked>
-            <label for="image_dither">Enable dithering</label>
-          </div>
-        </div>
-        <label for="image_paper">Paper</label>
-        <select id="image_paper">
-          <option value="gap" selected>gap</option>
-          <option value="black">black</option>
-          <option value="continuous">continuous</option>
-        </select>
-        <div class="actions">
-          <button type="button" onclick="printImage()">Print Image</button>
-        </div>
-      </div>
-    </section>
-  </main>
-
-  <script>
-    function commonParams() {{
-      const address = document.getElementById("address").value.trim();
-      const classic = document.getElementById("transport").value === "classic";
-      const channel = document.getElementById("channel").value;
-      const params = new URLSearchParams();
-      if (address) params.set("address", address);
-      params.set("classic", String(classic));
-      params.set("channel", channel);
-      return params;
-    }}
-
-    async function showResponse(response) {{
-      const output = document.getElementById("output");
-      let data;
-      try {{
-        data = await response.json();
-      }} catch {{
-        data = {{ detail: await response.text() }};
-      }}
-      output.textContent = JSON.stringify({{ status: response.status, ok: response.ok, data }}, null, 2);
-    }}
-
-    async function runGet(path) {{
-      const response = await fetch(`${{path}}?${{commonParams().toString()}}`);
-      await showResponse(response);
-    }}
-
-    async function scanAddress() {{
-      const btn = document.getElementById("scan-btn");
-      const output = document.getElementById("output");
-      btn.disabled = true;
-      btn.textContent = "Scanning…";
-      output.textContent = "Scanning for printer (up to 8 s)…";
-      try {{
-        const response = await fetch("scan");
-        const data = await response.json();
-        if (response.ok && data.address) {{
-          document.getElementById("address").value = data.address;
-          output.textContent = JSON.stringify({{ status: response.status, ok: true, data }}, null, 2);
-        }} else {{
-          output.textContent = JSON.stringify({{ status: response.status, ok: false, data }}, null, 2);
-        }}
-      }} catch (e) {{
-        output.textContent = "Scan failed: " + e;
-      }} finally {{
-        btn.disabled = false;
-        btn.innerHTML = "&#128268; Scan";
-      }}
-    }}
-
-    async function printText() {{
-      const form = new FormData();
-      form.set("text", document.getElementById("text").value);
-      form.set("density", document.getElementById("text_density").value);
-      form.set("copies", document.getElementById("text_copies").value);
-      form.set("font_size", document.getElementById("text_font_size").value);
-      form.set("label_length", document.getElementById("text_label_length").value);
-      form.set("paper", document.getElementById("text_paper").value);
-      form.set("address", document.getElementById("address").value.trim());
-      form.set("classic", String(document.getElementById("transport").value === "classic"));
-      form.set("channel", document.getElementById("channel").value);
-      const response = await fetch("print/text", {{ method: "POST", body: form }});
-      await showResponse(response);
-    }}
-
-    async function printImage() {{
-      const fileInput = document.getElementById("image_file");
-      if (!fileInput.files.length) {{
-        document.getElementById("output").textContent = "Select an image file first.";
-        return;
-      }}
-      const form = new FormData();
-      form.set("file", fileInput.files[0]);
-      form.set("density", document.getElementById("image_density").value);
-      form.set("copies", document.getElementById("image_copies").value);
-      form.set("label_length", document.getElementById("image_label_length").value);
-      form.set("paper", document.getElementById("image_paper").value);
-      form.set("dither", String(document.getElementById("image_dither").checked));
-      form.set("address", document.getElementById("address").value.trim());
-      form.set("classic", String(document.getElementById("transport").value === "classic"));
-      form.set("channel", document.getElementById("channel").value);
-      const response = await fetch("print/image", {{ method: "POST", body: form }});
-      await showResponse(response);
-    }}
-  </script>
-</body>
-</html>"""
+    # Simple substitution for initial values
+    return (
+        template.replace("{default_address}", default_address)
+        .replace("{ble_selected}", " selected" if default_transport == "ble" else "")
+        .replace("{classic_selected}", " selected" if default_transport == "classic" else "")
+        .replace("{default_channel}", str(_DEFAULT_CHANNEL))
+    )


 # ---------------------------------------------------------------------------
@@ -437,22 +132,6 @@ async def docs():
    )


-@app.get(
-    "/scan",
-    summary="Scan for printer",
-    response_description="BLE address of the discovered printer",
-)
-async def scan_printer():
-    """Scan for a Fichero/D11s printer via BLE and return its address."""
-    try:
-        address = await find_printer()
-    except PrinterNotFound as exc:
-        raise HTTPException(status_code=404, detail=str(exc)) from exc
-    except Exception as exc:
-        raise HTTPException(status_code=502, detail=str(exc)) from exc
-    return {"address": address}
-
-
@app.get(
    "/status",
    summary="Get printer status",
@@ -511,6 +190,90 @@ async def get_info(
    return info


+@app.post(
+    "/pair",
+    summary="Pair and trust a Bluetooth device",
+    status_code=200,
+)
+async def pair_device(
+    address: Annotated[str | None, Form(description="Device address (optional, overrides FICHERO_ADDR)")] = None,
+):
+    """
+    Attempt to pair and trust the device using `bluetoothctl`.
+    This is intended for setting up Classic Bluetooth connections.
+    """
+    addr = _address(address)
+    if not addr:
+        raise HTTPException(status_code=422, detail="Address is required to pair.")
+
+    # Basic validation for MAC address format to mitigate injection risk.
+    if not re.match(r"^[0-9A-F]{2}(:[0-9A-F]{2}){5}$", addr, re.IGNORECASE):
+        raise HTTPException(status_code=422, detail=f"Invalid address format: {addr}")
+
+    cmd = f'echo -e "pair {addr}\\ntrust {addr}\\nquit" | bluetoothctl'
+
+    try:
+        proc = await asyncio.create_subprocess_shell(
+            cmd,
+            stdout=asyncio.subprocess.PIPE,
+            stderr=asyncio.subprocess.PIPE,
+        )
+        stdout, stderr = await asyncio.wait_for(proc.communicate(), timeout=15.0)
+    except FileNotFoundError:
+        raise HTTPException(status_code=500, detail="`bluetoothctl` command not found. Is BlueZ installed and in PATH?")
+    except asyncio.TimeoutError:
+        raise HTTPException(status_code=504, detail="`bluetoothctl` command timed out after 15 seconds.")
+
+    output = stdout.decode(errors="ignore")
+    error = stderr.decode(errors="ignore")
+
+    if "Failed to pair" in output or "not available" in output.lower():
+        raise HTTPException(status_code=502, detail=f"Pairing failed. Output: {output}. Error: {error}")
+
+    return {"ok": True, "message": "Pair/trust command sent. Check output for details.", "output": output, "error": error}
+
+
+@app.post(
+    "/unpair",
+    summary="Unpair a Bluetooth device",
+    status_code=200,
+)
+async def unpair_device(
+    address: Annotated[str | None, Form(description="Device address (optional, overrides FICHERO_ADDR)")] = None,
+):
+    """
+    Attempt to unpair the device using `bluetoothctl`.
+    """
+    addr = _address(address)
+    if not addr:
+        raise HTTPException(status_code=422, detail="Address is required to unpair.")
+
+    # Basic validation for MAC address format to mitigate injection risk.
+    if not re.match(r"^[0-9A-F]{2}(:[0-9A-F]{2}){5}$", addr, re.IGNORECASE):
+        raise HTTPException(status_code=422, detail=f"Invalid address format: {addr}")
+
+    cmd = f'echo -e "remove {addr}\\nquit" | bluetoothctl'
+
+    try:
+        proc = await asyncio.create_subprocess_shell(
+            cmd,
+            stdout=asyncio.subprocess.PIPE,
+            stderr=asyncio.subprocess.PIPE,
+        )
+        stdout, stderr = await asyncio.wait_for(proc.communicate(), timeout=15.0)
+    except FileNotFoundError:
+        raise HTTPException(status_code=500, detail="`bluetoothctl` command not found. Is BlueZ installed and in PATH?")
+    except asyncio.TimeoutError:
+        raise HTTPException(status_code=504, detail="`bluetoothctl` command timed out after 15 seconds.")
+
+    output = stdout.decode(errors="ignore")
+    error = stderr.decode(errors="ignore")
+
+    if "Failed to remove" in output or "not available" in output.lower():
+        raise HTTPException(status_code=502, detail=f"Unpairing failed. Output: {output}. Error: {error}")
+
+    return {"ok": True, "message": "Unpair command sent. Check output for details.", "output": output, "error": error}
+
@app.post(
    "/print/text",
    summary="Print a text label",
--- a/fichero_printer/fichero/index.html
+++ b/fichero_printer/fichero/index.html
@@ -0,0 +1,307 @@
+<!doctype html>
+<html lang="en">
+<head>
+  <meta charset="utf-8">
+  <meta name="viewport" content="width=device-width, initial-scale=1">
+  <title>Fichero Printer</title>
+  <style>
+    :root {
+      --bg: #f4efe6;
+      --panel: #fffaf2;
+      --line: #d8cdbd;
+      --ink: #2d241d;
+      --muted: #6c6258;
+      --accent: #b55e33;
+      --accent-2: #245b4b;
+    }
+    * { box-sizing: border-box; }
+    body {
+      margin: 0;
+      font-family: "Noto Sans", system-ui, sans-serif;
+      color: var(--ink);
+      background:
+        radial-gradient(circle at top left, #fff8ed 0, transparent 35%),
+        linear-gradient(180deg, #efe4d3 0%, var(--bg) 100%);
+    }
+    main {
+      max-width: 980px;
+      margin: 0 auto;
+      padding: 24px 16px 40px;
+    }
+    .hero {
+      margin-bottom: 20px;
+      padding: 24px;
+      border: 1px solid var(--line);
+      border-radius: 18px;
+      background: rgba(255, 250, 242, 0.92);
+      backdrop-filter: blur(4px);
+    }
+    h1, h2 { margin: 0 0 12px; }
+    .muted { color: var(--muted); }
+    .grid {
+      display: grid;
+      gap: 16px;
+      grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
+    }
+    .card {
+      padding: 18px;
+      border: 1px solid var(--line);
+      border-radius: 16px;
+      background: var(--panel);
+      box-shadow: 0 8px 24px rgba(45, 36, 29, 0.06);
+    }
+    label {
+      display: block;
+      margin: 10px 0 6px;
+      font-size: 0.92rem;
+      font-weight: 600;
+    }
+    input, select, textarea, button {
+      width: 100%;
+      border-radius: 10px;
+      border: 1px solid var(--line);
+      padding: 10px 12px;
+      font: inherit;
+    }
+    textarea { min-height: 110px; resize: vertical; }
+    .row {
+      display: grid;
+      gap: 12px;
+      grid-template-columns: repeat(2, minmax(0, 1fr));
+    }
+    .inline {
+      display: flex;
+      gap: 10px;
+      align-items: center;
+      margin-top: 12px;
+    }
+    .inline input[type="checkbox"] { width: auto; }
+    button {
+      cursor: pointer;
+      font-weight: 700;
+      color: #fff;
+      background: var(--accent);
+      border: none;
+    }
+    button.alt { background: var(--accent-2); }
+    pre {
+      overflow: auto;
+      margin: 0;
+      padding: 12px;
+      border-radius: 12px;
+      background: #241f1a;
+      color: #f7efe4;
+      min-height: 140px;
+    }
+    .actions {
+      display: flex;
+      gap: 10px;
+      flex-wrap: wrap;
+      margin-top: 12px;
+    }
+    .actions button {
+      width: auto;
+      min-width: 140px;
+    }
+    @media (max-width: 640px) {
+      .row { grid-template-columns: 1fr; }
+      .actions button { width: 100%; }
+    }
+  </style>
+</head>
+<body>
+  <main>
+    <section class="hero">
+      <h1>Fichero Printer</h1>
+      <p class="muted">Home Assistant print console for status, text labels, and image uploads.</p>
+      <p class="muted">API docs remain available at <a href="docs">/docs</a>.</p>
+    </section>
+
+    <section class="grid">
+      <div class="card">
+        <h2>Connection</h2>
+        <label for="address">Printer address</label>
+        <input id="address" value="{default_address}" placeholder="C9:48:8A:69:D5:C0">
+
+        <div class="row">
+          <div>
+            <label for="transport">Transport</label>
+            <select id="transport">
+              <option value="ble"{ble_selected}>BLE</option>
+              <option value="classic"{classic_selected}>Classic</option>
+            </select>
+          </div>
+          <div>
+            <label for="channel">RFCOMM channel</label>
+            <input id="channel" type="number" min="1" max="30" value="{default_channel}">
+          </div>
+        </div>
+
+        <div class="actions">
+          <button type="button" class="alt" onclick="runPost('pair')">Pair Device</button>
+          <button type="button" class="alt" onclick="runPost('unpair')">Unpair Device</button>
+          <button type="button" class="alt" onclick="runGet('status')">Get Status</button>
+          <button type="button" class="alt" onclick="runGet('info')">Get Info</button>
+        </div>
+      </div>
+
+      <div class="card">
+        <h2>Output</h2>
+        <pre id="output">Ready.</pre>
+      </div>
+
+      <div class="card">
+        <h2>Print Text</h2>
+        <label for="text">Text</label>
+        <textarea id="text" placeholder="Hello from Home Assistant"></textarea>
+        <div class="row">
+          <div>
+            <label for="text_density">Density</label>
+            <select id="text_density">
+              <option value="0">0</option>
+              <option value="1">1</option>
+              <option value="2" selected>2</option>
+            </select>
+          </div>
+          <div>
+            <label for="text_copies">Copies</label>
+            <input id="text_copies" type="number" min="1" max="99" value="1">
+          </div>
+        </div>
+        <div class="row">
+          <div>
+            <label for="text_font_size">Font size</label>
+            <input id="text_font_size" type="number" min="6" max="200" value="30">
+          </div>
+          <div>
+            <label for="text_label_length">Label length (mm)</label>
+            <input id="text_label_length" type="number" min="5" max="500" value="30">
+          </div>
+        </div>
+        <label for="text_paper">Paper</label>
+        <select id="text_paper">
+          <option value="gap" selected>gap</option>
+          <option value="black">black</option>
+          <option value="continuous">continuous</option>
+        </select>
+        <div class="actions">
+          <button type="button" onclick="printText()">Print Text</button>
+        </div>
+      </div>
+
+      <div class="card">
+        <h2>Print Image</h2>
+        <label for="image_file">Image file</label>
+        <input id="image_file" type="file" accept="image/*">
+        <div class="row">
+          <div>
+            <label for="image_density">Density</label>
+            <select id="image_density">
+              <option value="0">0</option>
+              <option value="1">1</option>
+              <option value="2" selected>2</option>
+            </select>
+          </div>
+          <div>
+            <label for="image_copies">Copies</label>
+            <input id="image_copies" type="number" min="1" max="99" value="1">
+          </div>
+        </div>
+        <div class="row">
+          <div>
+            <label for="image_label_length">Label length (mm)</label>
+            <input id="image_label_length" type="number" min="5" max="500" value="30">
+          </div>
+          <div class="inline">
+            <input id="image_dither" type="checkbox" checked>
+            <label for="image_dither">Enable dithering</label>
+          </div>
+        </div>
+        <label for="image_paper">Paper</label>
+        <select id="image_paper">
+          <option value="gap" selected>gap</option>
+          <option value="black">black</option>
+          <option value="continuous">continuous</option>
+        </select>
+        <div class="actions">
+          <button type="button" onclick="printImage()">Print Image</button>
+        </div>
+      </div>
+    </section>
+  </main>
+
+  <script>
+    function commonParams() {
+      const address = document.getElementById("address").value.trim();
+      const classic = document.getElementById("transport").value === "classic";
+      const channel = document.getElementById("channel").value;
+      const params = new URLSearchParams();
+      if (address) params.set("address", address);
+      params.set("classic", String(classic));
+      params.set("channel", channel);
+      return params;
+    }
+
+    async function showResponse(response) {
+      const output = document.getElementById("output");
+      let data;
+      try {
+        data = await response.json();
+      } catch {
+        data = { detail: await response.text() };
+      }
+      output.textContent = JSON.stringify({ status: response.status, ok: response.ok, data }, null, 2);
+    }
+
+    async function runGet(path) {
+      const response = await fetch(`${path}?${commonParams().toString()}`);
+      await showResponse(response);
+    }
+
+    async function runPost(path) {
+      const form = new FormData();
+      const params = commonParams();
+      for (const [key, value] of params.entries()) {
+        form.set(key, value);
+      }
+      const response = await fetch(path, { method: "POST", body: form });
+      await showResponse(response);
+    }
+
+    async function printText() {
+      const form = new FormData();
+      form.set("text", document.getElementById("text").value);
+      form.set("density", document.getElementById("text_density").value);
+      form.set("copies", document.getElementById("text_copies").value);
+      form.set("font_size", document.getElementById("text_font_size").value);
+      form.set("label_length", document.getElementById("text_label_length").value);
+      form.set("paper", document.getElementById("text_paper").value);
+      form.set("address", document.getElementById("address").value.trim());
+      form.set("classic", String(document.getElementById("transport").value === "classic"));
+      form.set("channel", document.getElementById("channel").value);
+      const response = await fetch("print/text", { method: "POST", body: form });
+      await showResponse(response);
+    }
+
+    async function printImage() {
+      const fileInput = document.getElementById("image_file");
+      if (!fileInput.files.length) {
+        document.getElementById("output").textContent = "Select an image file first.";
+        return;
+      }
+      const form = new FormData();
+      form.set("file", fileInput.files[0]);
+      form.set("density", document.getElementById("image_density").value);
+      form.set("copies", document.getElementById("image_copies").value);
+      form.set("label_length", document.getElementById("image_label_length").value);
+      form.set("paper", document.getElementById("image_paper").value);
+      form.set("dither", String(document.getElementById("image_dither").checked));
+      form.set("address", document.getElementById("address").value.trim());
+      form.set("classic", String(document.getElementById("transport").value === "classic"));
+      form.set("channel", document.getElementById("channel").value);
+      const response = await fetch("print/image", { method: "POST", body: form });
+      await showResponse(response);
+    }
+  </script>
+</body>
+</html>
--- a/fichero_printer/fichero/printer.py
+++ b/fichero_printer/fichero/printer.py
@@ -8,6 +8,7 @@ Device class: AiYinNormalDevice (LuckPrinter SDK)

 import asyncio
 import sys
+import errno
 from collections.abc import AsyncGenerator
 from contextlib import asynccontextmanager

@@ -98,7 +99,19 @@ async def resolve_ble_target(address: str | None = None):
    """
    if address:
        device = await BleakScanner.find_device_by_address(address, timeout=8.0)
-        return device or address
+        if device is not None:
+            return device
+        # Fallback to active scan/match before giving up; do not fall back to
+        # raw address because BlueZ may then attempt BR/EDR and fail with
+        # br-connection-not-supported.
+        devices = await BleakScanner.discover(timeout=8)
+        for d in devices:
+            if d.address and d.address.lower() == address.lower():
+                return d
+        raise PrinterNotFound(
+            f"BLE device {address} not found during scan. "
+            "Ensure printer is on, awake, and in range."
+        )
    devices = await BleakScanner.discover(timeout=8)
    for d in devices:
        if d.name and any(d.name.startswith(p) for p in PRINTER_NAME_PREFIXES):
@@ -415,20 +428,47 @@ async def connect(
                    yield pc
                    return
            except (PrinterError, PrinterTimeout) as exc:
+                # On Linux, a stale BlueZ device state can cause RFCOMM connect()
+                # to fail with [Errno 12] Out of memory. This is a known quirk.
+                # We treat this specific error as a signal to fall back to BLE.
+                if isinstance(exc.__cause__, OSError) and exc.__cause__.errno == errno.ENOMEM:
+                    print(
+                        "Classic Bluetooth connection failed with [Errno 12] Out of memory. "
+                        "Falling back to BLE connection."
+                    )
+                    classic = False  # Modify flag to trigger BLE path below
+                    last_exc = exc
+                    break
                last_exc = exc
-        if last_exc is not None:
-            raise PrinterError(
-                f"Classic Bluetooth connection failed for '{address}'. "
-                f"Tried channels: {channels}. Last error: {last_exc}"
-            ) from last_exc
-        raise PrinterError(f"Classic Bluetooth connection failed for '{address}'.")
-    else:
+
+        # If the 'classic' flag is still true, it means the loop completed without
+        # hitting the ENOMEM fallback case, so all classic attempts failed.
+        if classic:
+            if last_exc is not None:
+                raise PrinterError(
+                    f"Classic Bluetooth connection failed for '{address}'. "
+                    f"Tried channels: {channels}. Last error: {last_exc}"
+                ) from last_exc
+            raise PrinterError(f"Classic Bluetooth connection failed for '{address}'.")
+
+    # If classic=False initially, or if it was set to False for the ENOMEM fallback:
+    if not classic:
        target = await resolve_ble_target(address)
        def _is_retryable_ble_error(exc: Exception) -> bool:
            msg = str(exc).lower()
-            return any(token in msg for token in ("timeout", "timed out", "br-connection-timeout"))
+            return any(
+                token in msg
+                for token in (
+                    "timeout",
+                    "timed out",
+                    "br-connection-timeout",
+                    "failed to discover services",
+                    "device disconnected",
+                )
+            )

        last_exc: Exception | None = None
+        forced_rescan_done = False
        for attempt in range(1, BLE_CONNECT_RETRIES + 1):
            try:
                async with BleakClient(target) as client:
@@ -445,8 +485,15 @@ async def connect(
            except BleakDBusError as exc:
                msg = str(exc).lower()
                if "br-connection-not-supported" in msg:
+                    last_exc = exc
+                    if not forced_rescan_done:
+                        forced_rescan_done = True
+                        target = await resolve_ble_target(None)
+                        if attempt < BLE_CONNECT_RETRIES:
+                            await asyncio.sleep(BLE_CONNECT_BACKOFF * attempt)
+                            continue
                    raise PrinterError(
-                        "BLE connection failed (br-connection-not-supported). "
+                        "BLE connection failed (br-connection-not-supported) after LE rescan. "
                        "Try Classic Bluetooth with classic=true and channel=1."
                    ) from exc
                last_exc = exc
--- a/fichero_printer/translations/de.yaml
+++ b/fichero_printer/translations/de.yaml
@@ -0,0 +1,13 @@
+configuration:
+  port:
+    name: "API-Port"
+    description: "Port des REST-API-Servers. Den obigen Port-Mapping-Eintrag entsprechend anpassen."
+  ble_address:
+    name: "Bluetooth-Adresse"
+    description: "Feste BLE-Adresse des Druckers (z.B. AA:BB:CC:DD:EE:FF). Leer lassen für automatischen Scan."
+  transport:
+    name: "Transport"
+    description: "Verbindungsart: 'ble' für Bluetooth Low Energy (Standard) oder 'classic' für RFCOMM."
+  channel:
+    name: "RFCOMM-Kanal"
+    description: "Classic-Bluetooth-RFCOMM-Kanal. Nur relevant wenn Transport auf 'classic' gesetzt ist."
--- a/fichero_printer/translations/en.yaml
+++ b/fichero_printer/translations/en.yaml
@@ -1,13 +1,13 @@
 configuration:
  port:
-    name: "API-Port"
-    description: "Port des REST-API-Servers. Den obigen Port-Mapping-Eintrag entsprechend anpassen."
+    name: "API Port"
+    description: "Port for the REST API server. Adjust the port mapping entry above accordingly."
  ble_address:
-    name: "Bluetooth-Adresse"
-    description: "Feste BLE-Adresse des Druckers (z.B. AA:BB:CC:DD:EE:FF). Leer lassen für automatischen Scan."
+    name: "Bluetooth Address"
+    description: "Fixed BLE address of the printer (e.g., AA:BB:CC:DD:EE:FF). Leave empty for automatic scan."
  transport:
    name: "Transport"
-    description: "Verbindungsart: 'ble' für Bluetooth Low Energy (Standard) oder 'classic' für RFCOMM."
+    description: "Connection type: 'ble' for Bluetooth Low Energy (default) or 'classic' for RFCOMM."
  channel:
-    name: "RFCOMM-Kanal"
-    description: "Classic-Bluetooth-RFCOMM-Kanal. Nur relevant wenn Transport auf 'classic' gesetzt ist."
+    name: "RFCOMM Channel"
+    description: "Classic Bluetooth RFCOMM channel. Only relevant if transport is set to 'classic'."
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -1,28 +1,31 @@
+[build-system]
+requires = ["setuptools>=61.0"]
+build-backend = "setuptools.build_meta"
+
 [project]
 name = "fichero-printer"
-version = "0.1.12"
-description = "Fichero D11s thermal label printer - BLE CLI tool"
+version = "0.1.27"
+description = "Web GUI, Python CLI, and protocol documentation for the Fichero D11s thermal label printer."
+readme = "README.md"
 requires-python = ">=3.10"
+license = {text = "MIT"}
+authors = [
+    {name = "0xMH"},
+    {name = "Paul Kozber"},
+]
 dependencies = [
    "bleak",
    "numpy",
-    "pillow",
-]
-
-[project.optional-dependencies]
-api = [
-    "fastapi>=0.111",
-    "uvicorn[standard]>=0.29",
+    "Pillow",
+    "fastapi",
+    "uvicorn[standard]",
    "python-multipart>=0.0.9",
 ]

-[build-system]
-requires = ["hatchling"]
-build-backend = "hatchling.build"
-
-[tool.hatch.build.targets.wheel]
-packages = ["fichero"]
-
 [project.scripts]
 fichero = "fichero.cli:main"
 fichero-server = "fichero.api:main"
+
+[tool.setuptools.packages.find]
+where = ["fichero_printer"]
+include = ["fichero*"]
--- a/sync_addon.sh
+++ b/sync_addon.sh
--- a/web/package.json
+++ b/web/package.json
@@ -2,7 +2,7 @@
 	"name": "fichero-web",
 	"private": true,
 	"type": "module",
-	"version": "0.1.9",
+	"version": "0.1.13",
 	"scripts": {
 		"dev": "vite",
 		"build": "vite build",
Author	SHA1	Message	Date
paul2212	48c40d9f8f	0.1.27	2026-03-16 14:17:49 +01:00
Paul	a7fabdae54	Merge pull request '0.1.25' (#6 ) from 0.1.25 into main Some checks failed Deploy to GitHub Pages / build (push) Has been cancelled Details Deploy to GitHub Pages / deploy (push) Has been cancelled Details Reviewed-on: #6	2026-03-16 12:48:37 +00:00
paul2212	fef3d18d3f	0.1.25	2026-03-16 13:48:12 +01:00
Paul	66c3f06b48	Merge pull request 'refactor' (#5 ) from 0.1.23 into main Some checks failed Deploy to GitHub Pages / build (push) Has been cancelled Details Deploy to GitHub Pages / deploy (push) Has been cancelled Details Reviewed-on: #5	2026-03-16 11:44:45 +00:00
paul2212	7843a38407	refactor	2026-03-16 12:43:26 +01:00
Paul	eee58431ab	update version Some checks failed Deploy to GitHub Pages / build (push) Has been cancelled Details Deploy to GitHub Pages / deploy (push) Has been cancelled Details	2026-03-16 09:26:06 +00:00
Paul	40a1f78f55	Merge pull request 'release/0.1.20' (#4 ) from release/0.1.20 into main Some checks failed Deploy to GitHub Pages / build (push) Has been cancelled Details Deploy to GitHub Pages / deploy (push) Has been cancelled Details Reviewed-on: #4	2026-03-16 09:21:35 +00:00
paul2212	16886bfa21	add files	2026-03-16 10:16:12 +01:00
paul2212	8520a88197	refactor: Externalize web UI to index.html Refactors the embedded web UI in the API server to be loaded from a separate index.html file instead of a large inline string. This improves maintainability by separating the presentation layer (HTML/CSS/JS) from the backend Python logic.	2026-03-16 10:15:22 +01:00
paul2212	1a51ebb122	Retry BLE with fresh LE scan on br-connection-not-supported (0.1.15) Some checks failed Deploy to GitHub Pages / build (push) Has been cancelled Details Deploy to GitHub Pages / deploy (push) Has been cancelled Details	2026-03-07 22:56:13 +01:00
paul2212	92a7224774	Avoid raw MAC BLE fallback and bump to 0.1.14 Some checks failed Deploy to GitHub Pages / build (push) Has been cancelled Details Deploy to GitHub Pages / deploy (push) Has been cancelled Details	2026-03-07 22:50:57 +01:00
Tobias Leuschner	9f191b564a	Bump version to 0.1.13 in API and package.json Some checks failed Deploy to GitHub Pages / build (push) Has been cancelled Details Deploy to GitHub Pages / deploy (push) Has been cancelled Details	2026-03-07 15:19:03 +01:00
paul2212	42e56e1b9f	Retry BLE service-discovery disconnect errors and bump to 0.1.13 Some checks failed Deploy to GitHub Pages / build (push) Has been cancelled Details Deploy to GitHub Pages / deploy (push) Has been cancelled Details	2026-03-07 15:12:56 +01:00