A REVIEW OF SMART WATER LEVEL AND TEMPERATURE MONITORING SYSTEMS WITH TFT GRAPHICS

Abstract

This project presents the design and implementation of a Water Level and Temperature Monitoring System with TFT Graphics using ESP32. The system is developed to continuously monitor the water level and temperature in tanks or reservoirs and display the measured values in real time using a graphical TFT display. The main objective of the project is to provide an accurate, cost effective, and user-friendly solution for water resource monitoring while reducing manual inspection and preventing water wastage. The system uses an HC-SR04 ultrasonic sensor to measure the water level by calculating the distance between the sensor and the water surface. A DHT11 temperature sensor is used to measure the surrounding temperature. The ESP32 microcontroller collects data from both sensors, processes the readings, and displays the information on an TFT display in the form of graphical water level indicators, percentage values, and temperature readings. The graphical interface makes it easy for users to understand the current status of the water tank at a glance. To improve safety and monitoring efficiency, the system also includes LED indicators and a buzzer. The LEDs indicate different water level conditions such as low, medium, and full, while the buzzer provides an audible alert whenever the water level falls below the minimum threshold or reaches a critical condition. In addition, the project integrates the Blynk IoT platform, allowing users to monitor water level and temperature remotely through a smartphone over Wi-Fi. This enables real-time monitoring from any location with an internet connection. The developed system is designed with a modular architecture, making it simple to install, operate, and maintain. The ESP32 microcontroller enables efficient data processing and wireless communication, allowing seamless integration with IoT platforms for future expansion. The graphical TFT display provides a clear and interactive user interface, enabling users to monitor system parameters quickly without requiring technical expertise. By combining sensor technology, embedded systems, and IoT connectivity, the proposed solution offers a reliable approach to smart water resource management while supporting sustainable water conservation practices. The system can also be upgraded with additional features such as automatic motor control, cloud data storage, water quality monitoring, and predictive analytics to meet future smart water management requirements. The proposed system offers several advantages, including high measurement accuracy, real-time monitoring, low power consumption, reduced human effort, and easy installation. It helps prevent water overflow, avoids water shortages, and supports efficient water management. The prototype has been successfully tested under different water level conditions, demonstrating reliable performance, fast response, and stable operation. The system is suitable for applications such as residential water tanks, industrial water storage, agricultural irrigation systems, educational laboratories, and smart water management solutions.