NetworkPrinter disconnect after first print on WIN

[A7mdlbanna]

When I print using NetworkPrinter it prints only the first time and then it doesn't appear in .discover()

Reproduce:
connect ESC mm80 printer over WIFI to your computer.

Then use this snippet

      final profile = await CapabilityProfile.load();
      final printers = await NetworkPrinterManager.discover();
      print(printers.length); // at least one printer discovered
      NetworkPrinter printer = printers[0]; 
      var manager = NetworkPrinterManager(printer, PaperSize.mm80, profile);
      if(!printer.connected) {
        final res = await manager.connect()
        print(res.msg); // gives Success for the first time and then timeout
      }
      ConnectionResponse res = await manager.writeBytes(data, isDisconnect: false);
      print(res.msg,); // Success every time

      printers = await pos.NetworkPrinterManager.discover();
      print(printers.length); // 0

[A7mdlbanna]

@kechankrisna any updates on what could be making this happen?

[grit-ameen]

any update on this

[grit-ameen]

call the connect method only once in initialization, don't call the connect method on every print, this works for me

[A7mdlbanna]

i work with multiple printeres so i need to connect multiple times for one printer

Ex:

• connects to Printer1

• prints

• disconnects from Printer1

• connects to Printer2

• prints

• disconnects from printer2

and smoetimes i loop over the saved printers and prints like small reciepts if it's a restaurant containing a printer for each kitchen

[grit-ameen]

I have the same feature to do, let me work on these and I'll update if i encounter these issue,

[grit-ameen]

Hi @A7mdlbanna i have done this feature as print 2 network local IP printers create 2 NetworkPrinterManager and connect them at a time for handling multiple printers

eg:
_connect() async {
debugPrint('Connecting to printer');
var paperSize = PaperSize.mm80;
var profile = await CapabilityProfile.load();
NetWorkPrinter printerData1 = NetWorkPrinter(address: "192.168.100.105");
NetWorkPrinter printerData2 = NetWorkPrinter(address: "192.168.100.103");
var manager1 = NetworkPrinterManager(printerData1, paperSize, profile);
var manager2 = NetworkPrinterManager(printerData2, paperSize, profile);
await manager1.connect();
await manager2.connect();