The 232 to 485 protocol will change
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The interface of 232 and 485 is completely different and incompatible, so it is not simple to adjust the line order to convert to each other.
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Although 232 and 485 are three lines, 232 is one to one, and 485 is a pair of signals plus a shield, the so-called \"a pair of\"; Refers to the 485 of the two signal lines can not be used separately, not one for sending and one for receiving.
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To convert between 232 and 485, you must convert 232 back to the UART interface, and then convert the UART to 485 via the interface chip.