Monitoring water quality using star topology wireless sensor networks

Abstract

The main purpose of this paper is how to implement wireless sensor networks (WSNs) using the star topology for water quality. This system using three devices. Two devices are the data transmitters and one device are the data receiver. Each device uses a NRF24L01 wireless module. There are two sensors that are temperature and Power of Hydrogen (pH) for each transmitter device. Each transmitter device can send temperature and pH data directly to the receiver. Receiver collects data from transmitter and sends it using serial communication to personal computer for monitoring. The result in the experiments is the data can be sent properly. The temperature sensor has an average error of 1.26 percent from 10 different data experiments. Data from the pH sensor test results explain that the pH sensor has an average error rate of 1.88 percent. The wireless module NRF24L01 can transmit data up to a distance of 30 meters. WSNs system using star topology has worked well and can be used in aquaculture ponds.