---
title: "readAttributeRmsVoltageSag(with:)"
framework: matter
role: symbol
role_heading: Instance Method
path: "matter/mtrclusterelectricalmeasurement/readattributermsvoltagesag(with:)"
---

# readAttributeRmsVoltageSag(with:)

## Declaration

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