public void OnPointerDown(PointerEventData eventData)
{
ButtonData button = this.transform.GetComponent <ButtonData>();
Debug.Log("button " + button.GetButtonName() + " pressed, message = " + button.GetButtonMessage());
byte[] message = StringToByteArray(button.GetButtonMessage());
//for (int i = 0; i < message.Length; i++)
// Debug.Log(message[i]);
BluetoothController.SetMessage(message);
isMoving = true;
oldPosition = transform.position;
clickOffset = Input.mousePosition - transform.position;
}