---
title: "readAttributeCOState(with:)"
framework: matter
role: symbol
role_heading: Instance Method
path: "matter/mtrclustersmokecoalarm/readattributecostate(with:)"
---

# readAttributeCOState(with:)

## Declaration

```swift
func readAttributeCOState(with params: MTRReadParams?) -> [String : Any]?
```