NAS Connect software for iOS 13 is a great tool for interfacing with NAS line of sensors / controllers / meters. Features include device setup and configuration, control and real-time readings. Only logged in owner of scanned NAS device has full access to the device. The rest will see just basic information. Authentication requires Internet connection. Currently supported devices: CM3021,  CM3030,  CM3040,  CM3061, CM3070,  CM3080