> 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-close.md).

# Serial Close

Close the specified serial port.

Action available for the following operating systems:

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

### Parameters

* **Serial Port** *\<unquoted string> -* The name of the port that user wants to close. Tipically is a Com Port, and user could 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.