readAttributeSerialNumber(completionHandler:)
Declaration
func readAttributeSerialNumber(completionHandler: @escaping @Sendable (String?, (any Error)?) -> Void)func readAttributeSerialNumber() async throws -> Stringfunc readAttributeSerialNumber(completionHandler: @escaping @Sendable (String?, (any Error)?) -> Void)func readAttributeSerialNumber() async throws -> String