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