---
title: "system.serial.sendBreak"
description: "Sends a break signal for approximately millis milliseconds."
---

# system.serial.sendBreak

> Sends a break signal for approximately millis milliseconds.

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.sendBreak(port, millis)`

### Parameters

|Type|Parameter|Description|
|--|--|--|
|String| `port` | The name of the serial port, e.g., "COM1" or "dev/ttyS0".|
|int| `millis`| Approximate length of break signal, in milliseconds.|
### Returns
Nothing
### Scope
All

## Code Examples
```python title="Example #1"
system.serial.sendBreak("COM1", 1000)
```