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| modbus_rtu_get_rts() | modbus_rtu_get_rts() |
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⟩
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