Acrosser AES-HM76Z1FL - Manual (Page 67)

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8.2.5. Serial Mode
1. Syntax:
get_comport_mode(int com)
Description: Get the Com port mode.
Parameters: 0:Com3, 1:Com4
Return Value: 0:RS485, 1:RS422
2. Syntax:
set_comport_mode(int com, int mode)
Description: Set the Com port mode.
Parameters: 0:Com3, 1:Com4.
0:RS485, 1:RS422
Return Value: None.