---
title: "readAttributeSerialNumber(completion:)"
framework: matter
role: symbol
role_heading: Instance Method
path: "matter/mtrbaseclusterbasicinformation/readattributeserialnumber(completion:)"
---

# readAttributeSerialNumber(completion:)

## Declaration

```swift
func readAttributeSerialNumber(completion: @escaping @Sendable (String?, (any Error)?) -> Void)
```

```swift
func readAttributeSerialNumber() async throws -> String
```