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 Stéphane Raimbault
       <stephane.raimbault@gmail.com>