Hi,
mySerialPort.print("v // Reset the display
mySerialPort.print("z // Brightness
mySerialPort.write(0x40); // 3/4 Intensity
mySerialPort.print("w // Decimal Point Control
You might have some problems here for a start.
Where are the ) for each of the mySerialPort statements?
You need to do an Auto Format.
In the IDE press CTRL-T.
You will then see any mismatched brackets and missing ;.
Tom.. 