void Start()
 {
     if (!PortControl.IsInpOutDriverOpen())
     {
         Debug.Log("Driver is not opened !!!");
         return;
     }
 }
 void Start()
 {
     if (!PortControl.IsInpOutDriverOpen())
     {
         Debug.Log("Driver is not opened !!!");
         return;
     }
     else
     {
         StartCoroutine(test());
     }
 }