Smart Water Monitoring and Billing System Using IoT and Mobile Technology

This research aims to develop a smart water usage monitoring and billing system that leverages the Internet of Things (IoT) and mobile applications to replace conventional manual methods, which are often costly, time-consuming, and less reliable. The proposed system integrates a flow sensor with a Node MCU Wi-Fi module to collect real-time water consumption data and transmit it automatically to the ThingSpeak cloud server. The server computes the amount of water consumed and the corresponding billing amount at fixed intervals, initially set to every 10 minutes. However, this duration can be adjusted according to user requirements. MATLAB® is employed to process and analyse the transmitted data, ensuring accuracy in both consumption tracking and cost estimation. The processed outputs are then delivered directly to a mobile application, providing users with convenient, continuous access to their daily water usage and associated charges. Results from the prototype demonstrate that the system can reduce manual labour, minimize operational costs, and improve transparency by allowing users to monitor and manage their water consumption proactively. Overall, this study highlights the potential of IoT-enabled mobile solutions to modernize utility services and serve as a foundation for future smart water management systems. Keywords: ThingSpeak cloud server, NodeMCU, Internet of Things