# SERIAL_OPEN_NONBLOCK

`import { SERIAL_OPEN_NONBLOCK } from "destack:device/binding";`

Open the port in nonblocking mode.

```ds title="SERIAL_OPEN_NONBLOCK"
const SERIAL_OPEN_NONBLOCK: SerialOpenFlags
```

[language/library/src/device/binding/serial.ds:16](https://github.com/destack-sh/destack/blob/main/language/library/src/device/binding/serial.ds#L16)