downloadPcx method
Downloads a PCX file to the printer.
Implementation
Future<bool> downloadPcx(String filePath) async {
var params = {
"printerId": _printerId,
"printInfo": _printerInfo.toMap(),
"filePath": filePath,
"brotherFileName": ITbCommand.pathToBrotherFileName(filePath)
};
final bool success =
await _channel.invokeMethod("typeB-downloadPcx", params);
return success;
}