---
title: "readAttributeBitmap16(completionHandler:)"
framework: matter
role: symbol
role_heading: Instance Method
path: "matter/mtrbaseclustertestcluster/readattributebitmap16(completionhandler:)"
---

# readAttributeBitmap16(completionHandler:)

## Declaration

```swift
func readAttributeBitmap16(completionHandler: @escaping @Sendable (NSNumber?, (any Error)?) -> Void)
```

```swift
func readAttributeBitmap16() async throws -> NSNumber
```