![]() This means that the special control characters Xon (DC1, 11hex, 17dec) and Xoff (DC3, 13hex, 19dec) are used for flow control in the data stream. This constant is used when the serial interface is to use software flow control. This means that RTS/CTS or RFR/CTS are used for flow control. This constant is used when the serial port is to use hardware flow control. This means that CRTSCTS plus XON/XOFF are used for flow control. This constant is used when the serial interface is to use both software and hardware flow control. This constant is used if the serial interface has 8 data bits. This constant is used if the serial interface has 7 data bits. This constant is used if the serial interface has 6 data bits. This constant is used if the serial interface has 5 data bits. This constant is used if the serial interface has 2 or 1.5 stop bits. This constant is used if the serial interface has 1 stop bit.
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