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Number of bytes waiting to be transferred. Reminder: In UNICODE, each character occupies two memory bytes.
Number of the relevant serial port: 1, 2, 3, ... 32 for COM1, COM2, COM3, ... COM32.Number of the relevant parallel port: -1, -2, -3 or -4 for LPT1, LPT2, LPT3 or LPT4.Number of the relevant infrared port: 1, 2, 3, ... 32 for IR1, IR2, IR3, ... IR32.Port number returned by sOpen (if this function was called with a port name).
Last update: 05/01/2020
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All you have to do is configure your product as follows: