arabic is not supported

[Rabeeh96]

E/flutter (16225): [ERROR:flutter/lib/ui/ui_dart_state.cc(209)] Unhandled Exception: Invalid argument (string): Contains invalid characters.: "السلام عليكم ورحمة الله وبركاته"
E/flutter (16225): #0 _UnicodeSubsetEncoder.convert (dart:convert/ascii.dart:85:9)
E/flutter (16225): #1 Latin1Codec.encode (dart:convert/latin1.dart:40:46)
E/flutter (16225): #2 Generator._encode (package:esc_pos_utils_plus/src/generator.dart:78:21)
E/flutter (16225): #3 Generator.text (package:esc_pos_utils_plus/src/generator.dart:355:9)
E/flutter (16225): #4 ESCPrinterService.getBytes (package:bluetooth_test/MasterBluetooth/service.dart:68:24)
E/flutter (16225):
E/flutter (16225): #5 _InvoicePrintScreenState._startPrinter (package:bluetooth_test/MasterBluetooth/bluetoothPrint.dart:248:16)
E/flutter (16225):
E/flutter (16225):

[iyashiyas]

i have tried below codes ..
but still not get anyting.. printing wrong characters.. any one have solutions ?

List byte = [];
// String reversString = reverseString(string);
final Generator ticket = Generator(paper, profile);
// ticket.setGlobalCodeTable('TP806L');
Uint8List encSeller =
await CharsetConverter.encode('ISO-8859-6', string);

      byte += ticket.textEncoded(encSeller,
          styles: const PosStyles(
              height: PosTextSize.size1,
              width: PosTextSize.size1,
              align: PosAlign.center,
              codeTable: 'CP864'));

      printer.rawBytes(byte);

[arbile26]

I suggest to you writing everything to in HTML then converting the content to image bytes using webcontent_converter package then print the bytes.
I have done this, and it works perfectly with Arabic.