---
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](../../../ignition-modules/vision/vision-project-properties/vision-project-properties.md#vision-permissions-properties) 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".
Integer| `millis` | Approximate length of break signal, in milliseconds.

### Returns
Nothing
### Scope
Gateway, Vision Client, Perspective Session

## Code Examples
```python title="Code Snippet"

# This example will send a break signal to a port called "COM1" for 10000 milliseconds.
port = "COM1"
millis = 10000
 
system.serial.sendBreak(port,millis)
```