Towards an IoT based water management system for a campus

We discuss the design and preliminary results of an IoT based system for management of the water distribution system in a large campus. In particular, we focus on two specific components of the system: a low cost ultrasonic based water level sensor and a sub-GHz based campus scale wireless network to connect the sensors. We describe techniques to achieve a large sensing distance that makes them suitable for installation across overhead tanks (OHT) and ground level reservoirs (GLR). The wireless network, which uses sub-GHz radios, connects to a gateway that can upload the data online for visualisation and analytics.