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MODBUS_RTU_SET_SERIA(3)	       libmodbus Manual	       MODBUS_RTU_SET_SERIA(3)

NAME
       modbus_rtu_set_serial_mode - set	the serial mode

SYNOPSIS
       int modbus_rtu_set_serial_mode(modbus_t *ctx, int mode);

DESCRIPTION
       The modbus_rtu_set_serial_mode()	function shall set the selected	serial
       mode:

       MODBUS_RTU_RS232
	   the serial line is set for RS232 communication. RS-232 (Recommended
	   Standard 232) is the	traditional name for a series of standards for
	   serial binary single-ended data and control signals connecting
	   between a DTE (Data Terminal	Equipment) and a DCE (Data
	   Circuit-terminating Equipment). It is commonly used in computer
	   serial ports

       MODBUS_RTU_RS485
	   the serial line is set for RS485 communication. EIA-485, also known
	   as TIA/EIA-485 or RS-485, is	a standard defining the	electrical
	   characteristics of drivers and receivers for	use in balanced
	   digital multipoint systems. This standard is	widely used for
	   communications in industrial	automation because it can be used
	   effectively over long distances and in electrically noisy
	   environments.

       This function is	only supported on Linux	kernels	2.6.28 onwards.

RETURN VALUE
       The function shall return 0 if successful. Otherwise it shall return -1
       and set errno to	one of the values defined below.

ERRORS
       EINVAL
	   The current libmodbus backend is not	RTU.

       ENOTSUP
	   The function	is not supported on your platform.

       If the call to ioctl() fails, the error code of ioctl will be returned.

AUTHORS
       The libmodbus documentation was written by StA(C)phane Raimbault
       <stephane.raimbault@gmail.com>

libmodbus v3.1.6		  08/10/2020	       MODBUS_RTU_SET_SERIA(3)

NAME | SYNOPSIS | DESCRIPTION | RETURN VALUE | ERRORS | AUTHORS

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