esc_pos_bluetooth 0.2.8

Flutter Android iOS

The library allows to print receipts using an ESC/POS thermal Bluetooth printer.

esc_pos_bluetooth #

Pub Version

The library allows to print receipts using a Bluetooth printer. For WiFi/Ethernet printers, use esc_pos_printer library.

TODO (PRs are welcomed!) #

  • Split byte data into chunks: issue
  • Print QR Codes using the GS ( k command (printing QR code from an image already supported)
  • PDF-417 Barcodes using the GS ( k command
  • Line spacing using the ESC 3 <n> command

How to Help #

  • Test your printer and add it in the table: Wifi/Network printer or Bluetooth printer
  • Test and report bugs
  • Share your ideas about what could be improved (code optimization, new features...)
  • PRs are welcomed!

Tested Printers #

Here are some printers tested with this library. Please add the models you have tested to maintain and improve this library and help others to choose the right printer.

Generate a Ticket #

Simple Ticket with Styles: #

Ticket testTicket() {
  final Ticket ticket = Ticket(PaperSize.mm80);

  ticket.text(
      'Regular: aA bB cC dD eE fF gG hH iI jJ kK lL mM nN oO pP qQ rR sS tT uU vV wW xX yY zZ');
  ticket.text('Special 1: àÀ èÈ éÉ ûÛ üÜ çÇ ôÔ',
      styles: PosStyles(codeTable: PosCodeTable.westEur));
  ticket.text('Special 2: blåbærgrød',
      styles: PosStyles(codeTable: PosCodeTable.westEur));

  ticket.text('Bold text', styles: PosStyles(bold: true));
  ticket.text('Reverse text', styles: PosStyles(reverse: true));
  ticket.text('Underlined text',
      styles: PosStyles(underline: true), linesAfter: 1);
  ticket.text('Align left', styles: PosStyles(align: PosAlign.left));
  ticket.text('Align center', styles: PosStyles(align: PosAlign.center));
  ticket.text('Align right',
      styles: PosStyles(align: PosAlign.right), linesAfter: 1);

  ticket.text('Text size 200%',
      styles: PosStyles(
        height: PosTextSize.size2,
        width: PosTextSize.size2,
      ));

  ticket.feed(2);
  ticket.cut();
  return ticket;
}

You can find more examples here: esc_pos_utils.

PrinterBluetoothManager printerManager = PrinterBluetoothManager();

printerManager.scanResults.listen((printers) async {
  // store found printers
});
printerManager.startScan(Duration(seconds: 4));

// ...

printerManager.selectPrinter(printer);
final PosPrintResult res = await printerManager.printTicket(testTicket());

print('Print result: ${res.msg}');

For a complete example, check the demo project example/blue.

Troubleshooting #

  • If your printer prints only 5%-10% of an image and then stops, or it can't print more than 1 image on the same ticket, or it can't print long tickets, try to ajust queueSleepTimeMs of the PrinterBluetoothManager.printTicket (try 50 or 100ms): printerManager.printTicket(await demoReceipt(paper), queueSleepTimeMs: 50);

Test Print #

test receipttest receipt
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likes
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pub points
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popularity

Publisher

tablemi.com

The library allows to print receipts using an ESC/POS thermal Bluetooth printer.

Repository (GitHub)
View/report issues

Documentation

API reference

License

BSD (LICENSE)

Dependencies

esc_pos_utils, flutter, flutter_bluetooth_basic, rxdart

More

Packages that depend on esc_pos_bluetooth