The first parameter is the port name as a string, usually COM1: or COM2:, but in theory the name could be anything, so I have used a string rather than a number.
第一个参数是端口的名称作为一个字符串，通常称作COM 1：或COM 2：，但在理论上的名称可能是任意，所以我用一个字符串，而不是一个数字。
The first parameter is the port name as a string, usually COM1: or COM2:, but in theory the name could be anything, so I have used a string rather than a number.
第一个参数是端口的名称作为一个字符串，通常称作COM 1：或COM 2：，但在理论上的名称可能是任意，所以我用一个字符串，而不是一个数字。
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