---
title: "system.serial.openSerialPort"
description: "Opens a previously configured serial port for use."
---

# system.serial.openSerialPort

> Opens a previously configured serial port for use.

This function is used in **Python Scripting**.

## Description
Opens a previously configured serial port for use. Will throw an exception if the serial port cannot be opened.

## Client Permission Restrictions
This scripting function has no [Client Permission](projects\project-properties\project-properties.md#client---permissions) restrictions.

## Syntax
`system.serial.openSerialPort(port)`

### Parameters

|Type|Parameter|Description|
|--|--|--|
|String |`port` |The name of the serial port, e.g., "COM1" or "dev/ttyS0".|
### Returns
Nothing
### Scope
All

## Code Examples
```python title="Example #1"
# Assuming "COM1" has already been configured with system.serial.configureSerialPort, this would open the port
system.serial.openSerialPort("COM1")
```