---
title: suspend()
framework: matter
role: symbol
role_heading: Instance Method
path: matter/mtrdevicecontroller/suspend()
---

# suspend()

Suspend the controller.  This will attempt to stop all network traffic associated with the controller.  The controller will remain suspended until it is resumed.

## Declaration

```swift
func suspend()
```

## Discussion

Discussion Suspending an already-suspended controller has no effect.