> For the complete documentation index, see [llms.txt](https://doc.sysdevmobile.com/kalipso5/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://doc.sysdevmobile.com/kalipso5/developing/form/actions/actions-description/group-communications/serial-flush.md).

# Serial Flush

Flushes the buffers of a specified serial port and causes all buffered data to be sent.

Action available for the following operating systems:

![](/files/-MGNsZjeYMKt8-HvBB5n)

### Parameters

* **Serial Port** *\<unquoted string> -* The number of the port to flush. Typically is a Com Port. You can choose from pre-defined Com Ports from Com0 to Com13. It's also possible defined a port dynamically by choosing option *dynamic* for this parameter.