readAttributeAverageRmsVoltageMeasurementPeriodPhaseB(completionHandler:)

Declaration

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

func readAttributeAverageRmsVoltageMeasurementPeriodPhaseB() async throws -> NSNumber