Initial release.

Connectivity #

• Bluetooth Classic (Android) and BLE (iOS) discovery, pairing, and connect.
• USB host transport (Android only).
• TCP/IP transport (Wi-Fi / Ethernet).

Printing #

• Text rows (single line, with optional bold and alignment).
• Bold-label / plain-value information rows.
• Dotted-leader value rows (label .... value) with auto-fallback to two-line layout when content overflows.
• Fully bold rows (totals, section headers).
• Section dividers — paper-width solid line with breathing space.
• QR codes and barcodes (Code128, EAN13).
• Bitmap printing (raster, with widthDots).
• Paper feed and cut.

Cyrillic #

• encodeToCp866(String) — pure-Dart Cyrillic-to-CP866 encoder. Bypasses Android Charset API which silently returns ? on devices without the CP866 charset registered.

Image preparation #

• XprinterImageDither.binarise() — Floyd-Steinberg or hard threshold, auto-detects content type (logo vs photo).
• XprinterImageLoader.fromUrl() / .fromAsset() / .fromBytes() — download or load + resize + binarise in one call. Returns print-ready PNG bytes.

Receipt layout helpers #

• XprinterLayout.configure(paperSizeMm:) — adapts character count + dot width for 58 / 72 / 80 mm.
• Public layout API: printLine, printInfoRow, printValueRow, printPlainRow, printBoldRow, printDiscountRow, printSectionDivider, printAssetIcon, printIconTextRow.

Compatibility #

• Tested on XP-58IIT (58 mm), XP-C260M (80 mm).
• iOS 14+, Android 5+ (minSdkVersion 21).