Add QIN LabelPrinter / LW650XL PRO (2e3c:5757) to known TSPL ids - #6
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Confirmed TSPL by direct write to /dev/usb/lp0; ieee1284_id reports CMD:XPP,XL with no TSPL string, same pattern as the XP-420B already noted in this file.
The udev rules and the README supported-printers table are hand-kept mirrors of KNOWN_IDS, so an id that lands only in the backend leaves the LW650XL PRO without its /dev/usb/tspl-label symlink and off the list that tells owners it is supported. Both mirrors now carry 2e3c:5757, the README names it under Confirmed working, and its ieee1284 string joins the XP-420B as the second example of a TSPL printer that never says TSPL. 2e3c is not registered to a printer vendor: it is Artery's AT32 MCU vendor id, the default in their USB device SDK, and absent from usb.ids. The LW650XL PRO is an Aimo/Quyin OEM unit and that family enumerates under its chipset's ids, so other rebadges may share the pair. The comment says so and keeps the entry pinned to :5757 rather than wildcarded the way the Poskey vendor ids are. A stub bus with only this printer sends the token through is_known(); it is the first exact-match entry after the wildcards, so a typo there or a dropped entry now fails the suite instead of merging green.
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Summary
2e3c:5757(QIN LabelPrinter, model LW650XL PRO) toKNOWN_IDSinbackend/tsplsotspl://autopicks it up.ieee1284_idreportsCMD:XPP,XLwith no literal "TSPL" string — confirmed TSPL support by direct write to/dev/usb/lp0and a successful physical test print.Test plan
idVendor=2e3c idProduct=5757)tspl://2e3c-5757and printed a test TSPL label — printed correctlytspl://autoshould now match it directly without pinning by vid-pid