When it’s not practical or cost effective to provide continuous data back-haul for a remotely deployed network of mist® sensor tags, one of the mist® devices can be designated as a data concentrator to collect and store sensor data for the networked devices.Then periodically the data can be retrieved by a visiting mist® Courier tag on a drone or passing vehicle and brought back to a facility with a mist® mesh gateway to back-haul the data globally to the desired data server(s).