One use of datalogger's is for gathering physiological conditional data about a person. A person can carry a datalogger and any associated sensors whilst they are in motion. The data recorded by the datalogger can then be uploaded to a third party system for analysis. Datalogger's that record physiological information have a variety of uses. For example, they can be used for medical purposes to monitor a patient's response to a course of treatment, or to monitor background factors about a person's lifestyle that may allow a doctor to advise on healthy living, and for sports purposes, to monitor an athlete's performance. Energy consumption is a significant issue in the design of datalogger's. It is desirable for a datalogger to be small and light, with a self-contained energy source such as a battery, but also to operate for as long as possible. This document describes means to prolong the life of the battery attached to both sensory devices and datalogger's alike. Also detailed are scalable bandwidth mechanisms to present the time series data in a manner such that the system may maintain a level of control, which may be predetermined and controlled by the system administrator, of brief or verbose data transfer dependant upon the functionality required. A level of sensory device category criticality is also included in to the system such that graceful degradation of the system might be achieved whilst supporting a level of criticality of the data prescribed by the system designer.
