WQMS: water quality monitoring station for IoT

Abstract

Water pollution threatens public health with infectious and transmissible diseases. The traditional approach of water quality monitoring consists in collecting samples of water and transporting them to specialised laboratories, which is a waste of manpower. Nowadays, Internet of Things (IoT) devices are capable of monitoring the water quality and reporting the data to a cloud server without any human intervention. However, related work does not present a comprehensive solution that covers the main design aspects; thus, we designed and built a water quality monitoring station (WQMS) that includes power management, data measurement, data transmission, and IoT. We deployed theWQMS in a remote fishpond with tilapias and measured the water quality for seven days in a row. The results show that the pH and dissolved oxygen can be expressed in terms of temperature as a quadratic function; besides, our solar energy harvesting module is a sustainable source of energy as long as there are no failures in the system.