openUart method
Implementation
void openUart(String s) async{
Map<String, String> params = Map<String, String>();
params['path'] = s;
await _methodChannel.invokeMethod('openUart',params);
}
void openUart(String s) async{
Map<String, String> params = Map<String, String>();
params['path'] = s;
await _methodChannel.invokeMethod('openUart',params);
}