WatAr: An Arduino-based Drinking Water Quality Monitoring System using Wireless Sensor Network and GSM Module

This paper presents an Arduino-based monitoring system that measures four physicochemical parameters of water: pH, temperature, turbidity, and electrical conductivity to identify possible water contamination. The system is designed with two nodes: the sensor node and the sink node. The sensor node performs the collection, pre-processing of data, relay of sensed data wirelessly, data storage systems, data display in an LCD and ThingSpeak channel, and SMS notifications. While the sink node performs data reception from the sensor node, data display in an LCD, and alert systems utilizing a buzzer whenever water is determined to be unsafe for drinking.