International Journal of Scientific Research and Engineering Development

Water scarcity in urban residential areas like Vasai-Virar has forced households to adopt unconventional water storage systems, leading to water overflow and wastage. This paper presents an IoT-enabled automatic water tank control system using NodeMCU (ESP8266). The system senses the tank level using two digital sensors and automatically controls two solenoid valves, irrespective of whether the inlets are at the top or bottom. It sends real-time tank status, fill level, and valve activity to a mobile phone using Wi-Fi, ensuring equitable water distribution and preventing overflow. A comparative analysis of different microcontrollers is presented to justify the selection of NodeMCU for this low-cost and scalable solution.