---
title: "readAttributeChannelPage0Mask(completionHandler:)"
framework: matter
role: symbol
role_heading: Instance Method
path: "matter/mtrbaseclusterthreadnetworkdiagnostics/readattributechannelpage0mask(completionhandler:)"
---

# readAttributeChannelPage0Mask(completionHandler:)

## Declaration

```swift
func readAttributeChannelPage0Mask(completionHandler: @escaping @Sendable (Data?, (any Error)?) -> Void)
```

```swift
func readAttributeChannelPage0Mask() async throws -> Data
```