esc_pos_printer 2.1.0

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

esc_pos_printer

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

[pub.dev page] | [Documentation]

WiFi printing can be used in Flutter or pure Dart projects. For Flutter projects, both Android and iOS are supported.

Bluetooth printing can be used only for iOS. Android support will be added soon (I hope).

To discover existing printers in your subnet, consider using ping_discover_network package. Note that most of the ESC/POS printers by default listen on port 9100.

Main Features

• Connect to Wi-Fi / Bluetooth printers
• 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 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 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 barcode:

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

Getting Started (WiFi printer)

import 'package:esc_pos_printer/esc_pos_printer.dart';

final PrinterNetworkManager printerManager = PrinterNetworkManager();
printerManager.selectPrinter('192.168.0.123', port: 9100);
final PosPrintResult res = await printerManager.printTicket(testTicket());

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

For more details, check example/example.dart and example/discover_printers.

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 demo project example/blue.

TODO

• Bluetooth printers: add Android support
• Print QR codes
• USB printers support

Test print