Alex CubeandClaude Opus 5.5
9e06f3ebd0
- printer.py: protocol with flow control (pause / resend / done) - lxd02.py: print text or pictures from the command line - windows/: POS-58 driver + local ESC/POS server = a regular Windows printer, Explorer menu for pictures - custom_components/lxd02: Home Assistant integration with a persistent queue Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
73 lines
2.6 KiB
Python
73 lines
2.6 KiB
Python
"""Print on the LX-D02 thermal printer from the PC.
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Usage: python lxd02.py "text" [more lines...]
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python lxd02.py picture.jpg [more pictures...] (stretched to the tape width)
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Set LXD02_MAC=AA:BB:CC:DD:EE:FF to skip the Bluetooth search.
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"""
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import asyncio
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import os
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import sys
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from pathlib import Path
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from bleak import BleakClient, BleakScanner
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from PIL import Image, ImageOps
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sys.path.insert(0, str(Path(__file__).resolve().parent / "custom_components" / "lxd02"))
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from printer import WIDTH, print_payloads, render, to_payloads # noqa: E402
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PICTURES = {".jpg", ".jpeg", ".png", ".bmp", ".gif", ".webp", ".tif", ".tiff"}
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def picture(path):
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"""Any picture -> 1-bit image WIDTH wide. Landscape ones are turned to run
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along the tape, so they come out bigger."""
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img = ImageOps.exif_transpose(Image.open(path)).convert("RGBA")
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white = Image.new("RGBA", img.size, "white")
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img = Image.alpha_composite(white, img).convert("L") # transparent -> white, not black
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if img.width > img.height:
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img = img.rotate(90, expand=True)
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img = img.resize((WIDTH, max(2, round(img.height * WIDTH / img.width))), Image.LANCZOS)
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return ImageOps.autocontrast(img, cutoff=1).convert("1") # dithering for halftones
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async def send(img, mac=None):
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mac = mac or os.environ.get("LXD02_MAC")
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if not mac:
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device = await BleakScanner.find_device_by_name("LX-D02", timeout=20)
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if device is None:
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raise RuntimeError("LX-D02 not found: is it on and not connected to a phone?")
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mac = device.address
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for attempt in range(3): # Windows often fails the first connect to a sleeping printer
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try:
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client = BleakClient(mac, timeout=20)
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await client.connect()
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break
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except Exception:
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if attempt == 2:
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raise
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await asyncio.sleep(2)
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try:
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await print_payloads(client, mac, to_payloads(img))
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finally:
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await client.disconnect()
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def main(args):
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if args and all(Path(a).suffix.lower() in PICTURES and Path(a).is_file() for a in args):
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for a in args:
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print("printing", a)
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asyncio.run(send(picture(a)))
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else:
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asyncio.run(send(render("\n".join(args) or "Hello, LX-D02!\nПривет с ПК")))
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print("ok")
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if __name__ == "__main__":
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try:
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main(sys.argv[1:])
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except Exception as err: # started from "Send to": keep the window open to show why
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print("ERROR:", err)
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if sys.stdin and sys.stdin.isatty():
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input("Press Enter to close")
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sys.exit(1)
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