kechankrisna/pos_printer_manager

pos_printer_manager

This plugin allow developer to print to esc printer both wireless or bluetooth (currently support only on android). This has method to list down those printers easily.

Example

• Bluetooth Printer

  _scan() async {
    print("scan");
    setState(() {
      _isLoading = true;
      _printers = [];
    });
    var printers = await BluetoothPrinterManager.discover();
    print(printers);
    setState(() {
      _isLoading = false;
      _printers = printers;
    });
  }

  _connect(BluetoothPrinter printer) async {
    var paperSize = PaperSize.mm80;
    var profile = await CapabilityProfile.load();
    var manager = BluetoothPrinterManager(printer, paperSize, profile);
    await manager.connect();
    print(" -==== connected =====- ");
    setState(() {
      _manager = manager;
      printer.connected = true;
    });
  }

  _startPrinter() async {
    final content = Demo.getShortReceiptContent();
    var bytes = await WebcontentConverter.contentToImage(content: content);
    var service = ESCPrinterService(bytes);
    var data = await service.getBytes(paperSize: PaperSize.mm58);
    if (_manager != null) {
      print("isConnected ${_manager.isConnected}");
      _manager.writeBytes(data, isDisconnect: false);
    }
  }

• Network Printer

  _scan() async {
    setState(() {
      _isLoading = true;
      _printers = [];
    });
    var printers = await NetworkPrinterManager.discover();
    setState(() {
      _isLoading = false;
      _printers = printers;
    });
  }

  _connect(NetWorkPrinter printer) async {
    var paperSize = PaperSize.mm80;
    var profile = await CapabilityProfile.load();
    var manager = NetworkPrinterManager(printer, paperSize, profile);
    await manager.connect();
    setState(() {
      _manager = manager;
      printer.connected = true;
    });
  }

  _startPrinter() async {
    if (_data.isEmpty) {
      final content = Demo.getShortReceiptContent();
      var bytes = await WebcontentConverter.contentToImage(
        content: content,
        executablePath: WebViewHelper.executablePath(),
      );
      var service = ESCPrinterService(bytes);
      var data = await service.getBytes();
      if (mounted) setState(() => _data = data);
    }

    if (_manager != null) {
      print("isConnected ${_manager.isConnected}");
      _manager.writeBytes(_data, isDisconnect: false);
    }
  }

• USB Printer

_scan() async {
    setState(() {
      _isLoading = true;
      _printers = [];
    });
    var printers = await USBPrinterManager.discover();
    setState(() {
      _isLoading = false;
      _printers = printers;
    });
  }

  _connect(USBPrinter printer) async {
    var paperSize = PaperSize.mm80;
    var profile = await CapabilityProfile.load();
    var manager = USBPrinterManager(printer, paperSize, profile);
    await manager.connect();
    setState(() {
      _manager = manager;
      printer.connected = true;
    });
  }

  _startPrinter() async {
    if (_data.isEmpty) {
      final content = Demo.getShortReceiptContent();
      var bytes = await WebcontentConverter.contentToImage(
        content: content,
        executablePath: WebViewHelper.executablePath(),
      );
      var service = ESCPrinterService(bytes);
      var data = await service.getBytes();
      if (mounted) setState(() => _data = data);
    }

    if (_manager != null) {
      print("isConnected ${_manager.isConnected}");
      _manager.writeBytes(_data, isDisconnect: false);
    }
  }

Supports

Device	Network	Bluetooth	USB
Android	✓	✓	✓
IOS	✓	✓	✗
Macos	✓	✗	✗
Windows	✓	✗	✓
Linux	✓	✗	✗

*** USB: will be the set to the next plan of update

Getting Started

  flutter pub add pos_printer_manager

Thank to :

• blue_thermal_printer
• esc_pos_utils
• ping_discover_network
• network_info_plus
• printing