ESC/POS (thermal, receipt) printing for Flutter & Dart

Flutterappworld

5 years ago

esc_pos_bluetooth

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

[pub.dev page] | [Documentation]

Tested Printers

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

Main Features

Android / iOS support
Simple text printing using text method
Tables printing using row method
Text styling:
- size, align, bold, reverse, underline, different fonts, turn 90°
Print images
Print barcodes
- UPC-A, UPC-E, JAN13 (EAN13), JAN8 (EAN8), CODE39, ITF (Interleaved 2 of 5), CODABAR (NW-7)
Paper cut (partial, full)
Beeping (with different duration)
Paper feed, reverse feed

Note: Your printer may not support some of the presented features (especially for underline styles, partial/full paper cutting, reverse feed, …).

Getting started (Generate a ticket)

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: PosTextAlign.left));
  ticket.text('Align center', styles: PosStyles(align: PosTextAlign.center));
  ticket.text('Align right',
      styles: PosStyles(align: PosTextAlign.right), linesAfter: 1);

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

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

Print a table row:

ticket.row([
    PosColumn(
      text: 'col3',
      width: 3,
      styles: PosStyles(align: PosTextAlign.center, underline: true),
    ),
    PosColumn(
      text: 'col6',
      width: 6,
      styles: PosStyles(align: PosTextAlign.center, underline: true),
    ),
    PosColumn(
      text: 'col3',
      width: 3,
      styles: PosStyles(align: PosTextAlign.center, underline: true),
    ),
  ]);

Print an image:

import 'dart:io';
import 'package:image/image.dart';

const String filename = './logo.png';
final Image image = decodeImage(File(filename).readAsBytesSync());
// Using (ESC *) command
ticket.image(image);
// Using an alternative obsolette (GS v 0) command
ticket.imageRaster(image);

Print a barcode:

final List<int> barData = [1, 2, 3, 4, 5, 6, 7, 8, 9, 0, 4];
ticket.barcode(Barcode.upcA(barData));

Getting Started (Bluetooth printer)

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 more details, check the demo project example/blue.

Test print

Download Source Code on GitHub

ESC/POS (thermal, receipt) printing for Flutter & Dart (Android/iOS)
https://github.com/andrey-ushakov/esc_pos_bluetooth
320 forks.
249 stars.
108 open issues.

Recent commits:

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