open_serial Command to initialize the serial port which is connected to Arduino res=open_serial(nHandle, nPort,baudrate) nHandle : Board number, reserved for future use. For this version, any number would do nPort : Com port in which the Arduino is connected to baudrate : baudrate for the serial comminication res : 0 if the connection is successful, else the connection fail To connect to the Arduino board. To check the port number, do to the device manager or check it from the Arduino software close_serial Bruno JOFRET