---
title: "readAttributeMeasuredPhase1stHarmonicCurrent(completionHandler:)"
framework: matter
role: symbol
role_heading: Instance Method
path: "matter/mtrbaseclusterelectricalmeasurement/readattributemeasuredphase1stharmoniccurrent(completionhandler:)"
---

# readAttributeMeasuredPhase1stHarmonicCurrent(completionHandler:)

## Declaration

```swift
func readAttributeMeasuredPhase1stHarmonicCurrent(completionHandler: @escaping @Sendable (NSNumber?, (any Error)?) -> Void)
```

```swift
func readAttributeMeasuredPhase1stHarmonicCurrent() async throws -> NSNumber
```