# Serial Close Close the specified serial port. Action available for the following operating systems: ![](/files/-MGNsZjeYMKt8-HvBB5n) ### Parameters * **Serial Port** *\ -* 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. --- # Agent Instructions: Querying This Documentation If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question. Perform an HTTP GET request on the current page URL with the `ask` query parameter: ``` GET https://doc.sysdevmobile.com/kalipso5/developing/form/actions/actions-description/group-communications/serial-close.md?ask= ``` The question should be specific, self-contained, and written in natural language. The response will contain a direct answer to the question and relevant excerpts and sources from the documentation. Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.