Water quality monitoring is essential to ensure safe drinking water and to protect public health. This project presents an IoT-based cloud water quality monitoring system that continuously measures important water parameters and sends abnormal condition alerts through email. The system uses the ESP32 as the main controller to collect and process data from multiple sensors. The system includes a DS18B20 Temperature Sensor for temperature measurement, a pH sensor to detect acidity or alkalinity of water, a turbidity sensor to measure water clarity, and a TDS sensor to determine the total dissolved solids present in the water. All sensor data are read and processed by the ESP32 and displayed locally on an LCD display through an I2C communication interface. Using the built-in Wi-Fi capability of ESP32, the measured parameters are uploaded to the cloud platform ThingSpeak for real-time monitoring and data storage. The system continuously checks the sensor values against predefined threshold limits. Whenever any parameter exceeds the safe limit, the system automatically sends an abnormal alert notification through email to the concerned user. This IoT-based monitoring system helps in early detection of water contamination and enables remote monitoring through the cloud. The proposed system is low-cost, efficient, and suitable for applications such as drinking water monitoring, industrial water quality checking, and environmental water analysis.      

Objectives:

• To develop an IoT-based water quality monitoring system using ESP32.
• To measure water parameters such as temperature, pH, turbidity, and TDS.
• To display real-time sensor readings on an LCD.
• To upload water quality data to the ThingSpeak cloud platform.
• To detect unsafe water conditions using preset threshold values.
• To send email alerts when water quality exceeds safe limits.
• To provide a low-cost, reliable, and continuous water monitoring solution.

        The major building blocks of this project are:  

• Adapter Power supply.
• ESP32.
• PH sensor.
• Temperature sensor.
• Turbidity
• TDS sensor.
• LCD display.

      Software’s used:  

• Arduino IDE for compiling and dumping code into Microcontroller.
• Thingspeak Cloud.
• Express SCH for Circuit design.

      video: