---
title: "system.serial.write"
description: "Write a String to a serial port using the platforms default character encoding."
---

# system.serial.write

> Write a String to a serial port using the platforms default character encoding.

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

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

## Syntax
`system.serial.write(port, toWrite)`

### Parameters

|Type|Parameter|Description|
|--|--|--|
|String |`port` | The previously configured serial port to use.|
|String |`toWrite` | The String to write.|
### Returns
Nothing
### Scope
All

## Code Examples
```python title="Example #1"
system.serial.write("COM1", "my string")
```