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