我有我Flutter应用程序，使用cpcl命令与斑马zq220打印机通信。它工作正常，但不打印€欧元符号
这里我函数创建cpcl命令

List<String>lst=[];
lst.add("TEXT 4 2 0 80 € 12.9");
//HERE WITH OTHER COMMANDS AND FINALLY
String ss="";
for(int i=0;i<lst.length;++i)
{
ss+="${lst[i]}\r\n"
}
await sendByte(ss);

字符串
这是我的函数，要发送到我的斑马打印机

Future<void> sendByte(String scmd) async {
  
    List<BluetoothService> services = await connectDevice!.discoverServices();
    for (BluetoothService service in services) {
     
      var characteristics = service.characteristics;
     
      for (BluetoothCharacteristic c in characteristics) {
        
//here are three encode type that work fine all with zebra printer, but they don't print euro symbol
           c.write(gbk.encode(scmd));
           //c.write(utf8.encode(scmd));
          //c.write(gbk_bytes.encode(scmd));
       
      }
    }
  }

型
所以有人能帮我找到解决方案，如何打印欧元符号与此？？提前感谢最好的问候