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MODBUS_RTU_GET_RTS(3)	       libmodbus Manual		 MODBUS_RTU_GET_RTS(3)

NAME
       modbus_rtu_get_rts - get	the current RTS	mode in	RTU

SYNOPSIS
       int modbus_rtu_get_rts(modbus_t *ctx);

DESCRIPTION
       The modbus_rtu_get_rts()	function shall get the current Request To Send
       mode of the libmodbus context ctx. The possible returned	values are:

       •   MODBUS_RTU_RTS_NONE

       •   MODBUS_RTU_RTS_UP

       •   MODBUS_RTU_RTS_DOWN

       This function can only be used with a context using a RTU backend.

RETURN VALUE
       The function shall return the current RTS mode if successful. Otherwise
       it shall	return -1 and set errno.

ERRORS
       EINVAL
	   The libmodbus backend is not	RTU.

SEE ALSO
       modbus_rtu_set_rts(3)

AUTHORS
       The libmodbus documentation was written by Stphane Raimbault
       <stephane.raimbault@gmail.com>

libmodbus v3.1.7		  04/12/2025		 MODBUS_RTU_GET_RTS(3)

Want to link to this manual page? Use this URL:
<https://man.freebsd.org/cgi/man.cgi?query=modbus_rtu_get_rts&sektion=3&manpath=FreeBSD+Ports+14.3.quarterly>

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