i-ZEN an Intelligent Zero ENergy Flow Meter

In this paper we present a fully energy autonomous water flow meter exploiting a low power controller and communications module in order to integrate the resulting device into an intelligent zero (externally provided) energy (i-ZEN) flow meter for the Internet of Things. We describe the optimized for power consumption hardware design, the application to exploit the collected data and we present measurements from the evaluation of the prototype in operation that show that the device can operate practically for unlimited time.