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MODBUS_RTU_SET_CUSTO(3)	       libmodbus Manual	       MODBUS_RTU_SET_CUSTO(3)

NAME
       modbus_rtu_set_custom_rts - set a function to be	used for custom	RTS
       implementation

SYNOPSIS
       int modbus_rtu_set_custom_rts(modbus_t *ctx, void (set_rts) (modbus_t
       ctx, int	on))

DESCRIPTION
       The modbus_rtu_set_custom_rts() function	shall set a custom function to
       be called when the RTS pin is to	be set before and after	a
       transmission. By	default	this is	set to an internal function that
       toggles the RTS pin using an ioctl call.

       Note that this function adheres to the RTS mode,	the values
       MODBUS_RTU_RTS_UP or MODBUS_RTU_RTS_DOWN	must be	used for the function
       to be called.

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

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

ERRORS
       EINVAL
	   The libmodbus backend is not	RTU.

AUTHORS
       Jimmy BergstrA<paragraph>m <jimmy@ekontroll.com>

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

libmodbus v3.1.6		  03/01/2021	       MODBUS_RTU_SET_CUSTO(3)

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

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