---
title: "contentAppMessage(with:completion:)"
framework: matter
role: symbol
role_heading: Instance Method
path: "matter/mtrbaseclustercontentappobserver/contentappmessage(with:completion:)"
---

# contentAppMessage(with:completion:)

Command ContentAppMessage

## Declaration

```swift
func contentAppMessage(with params: MTRContentAppObserverClusterContentAppMessageParams, completion: @escaping @Sendable (MTRContentAppObserverClusterContentAppMessageResponseParams?, (any Error)?) -> Void)
```

```swift
func contentAppMessage(with params: MTRContentAppObserverClusterContentAppMessageParams) async throws -> MTRContentAppObserverClusterContentAppMessageResponseParams
```

## Discussion

Discussion Upon receipt, the data field MAY be parsed and interpreted.