readAttributeDcVoltage(completionHandler:)
Declaration
func readAttributeDcVoltage(completionHandler: @escaping @Sendable (NSNumber?, (any Error)?) -> Void)func readAttributeDcVoltage() async throws -> NSNumberfunc readAttributeDcVoltage(completionHandler: @escaping @Sendable (NSNumber?, (any Error)?) -> Void)func readAttributeDcVoltage() async throws -> NSNumber