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Post on 20-Feb-2017
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Mobile Sensor Node for Real Time Monitoring of pH Level in Domestic Water Resources
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INTRODUCTION
With present environmental pollution, access to clean water is being limited all over the world
Typical, laboratory experiments and official water quality tests take considerable amount of time
Demand for real time water quality monitoring is ever increasing
This project proposes a mobile framework to real time monitoring of pH value in domestic water resources
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INTRODUCTION
pH stands for Potential Hydrogen
Measures the acid/alkaline level in our water.
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INTRODUCTION
Source: simplifylifeinvizag.blogspot.com/
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INTRODUCTION
Drinking acidic beverages (soda) decreases pH value.
The body begins to extract alkaline minerals such as Calcium, Magnesium, and Potassium from bones, teeth, and eyes to restore the balance needed to stay alive.
After years of pulling minerals from different sources : leads to osteoporosis, bad vision, bad teeth and other illnesses.
The body retains water to dilute the acidity and will store cholesterol in the arteries to maintain blood pH. No matter how much you exercise, your body will continue to keep a tight hold on the fats to protect itself.
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INTRODUCTION
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OBJECTIVES
• To design and develop a sensor device to measure pH level in water.
• To design and develop a communication module to transmit pH values to a mobile phone using WiFi
• To develop a mobile application to display pH levels in water in real time in numeric and graphical form
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METHODOLOGY
Concepts of wireless sensor networks and ad-hoc networking
Two nodes, one sensor node and one sink node (base station)
Sensor node is located where measurements are takenResponsible for sending data to the sink node
Sink node is the mobile deviceCollect sensed data Serve data to user
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METHODOLOGY
System Overview
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METHODOLOGY DEVELOPMENT OF THE SENSOR NODE
The sensor node
Wi-Fi module (Hi Link HLK-RM04) Microcontroller board (Arduino Uno Board)
pH probe pH circuit
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METHODOLOGY DEVELOPMENT OF THE SENSOR NODE
1- Atlas Scientific pH circuit, 2- Atlas Scientific pH probe, 3- BNC connector, 4- HLK-RM04 Wi-Fi module, 5- Arduino Uno board with 32-bit Atmel ARM Microprocessor, 6- Analog pins, 7- Digital TX and RX pins, 8- 9.0v battery
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METHODOLOGY DEVELOPMENT OF THE SENSOR NODE
Obtaining Measurements
Readings are taken at every 15 secondsOutput of the pH circuit was ASCII characters
representing the pH value
Command “R” was used to instruct the pH Circuit to return a single pH reading
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METHODOLOGY DEVELOPMENT OF THE SENSOR NODE
A Wireless network, created by the mobile device using Wi-Fi technology
“http GET” request is used to transmit pH values via WiFi
Mobile device displays pH value in real time
GUI is dynamically updated upon receiving data continuously
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METHODOLOGY DEVELOPMENT OF THE SENSOR NODE
Connecting to the network Configuring Wi-Fi Module
Net mode (Wi Fi Client) SSID (AccessPoint) Encrypt type (OPEN) IP type (DHCP) Baud rate (38400) Network mode (Client) Network protocol (TCP)
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METHODOLOGY DEVELOPMENT OF THE SENSOR NODE
Sending the request “In Wi-Fi client mode, it sends data arriving at the serial
port over the network”The prepared request is transmitted to the serial port of
the Wi-Fi module
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METHODOLOGY DEVELOPMENT OF MOBILE APPLICATION
Creating the networkandroid.net.wifi which provides classes to manage a
device’s Wi-Fi functionality
Activate device’s Wi-Fi hot spot mode
To configure network settings android.net.wifi.WifiConfiguration
Need user permission to access Wi-Fi functionality
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RESULTS DEVELOPMENT OF MOBILE APPLICATION
Graphical User Interfaces and Database four main GUIs
pH monitor pH history network settings
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RESULTS
The mobile application is tested on a Samsung Galaxy S Duos 2 mobile phone Android version 4.2.2 Wi-Fi 802.11 b/g/n Hotspot OPEN,WPA
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RESULTS
HLK-RM04 module is very easy to use and cost effective
Configuration through a web page Access point / Wi-Fi client Connection to Ethernet DHCP and static IP type Client / Server TCP/UDP
Cos of wireless communication modules
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CONCLUSION Real time pH monitor
User friendly graphical interfaces Log system to store previous records and analyze them
through an auto generated graph. Track sudden changes in pH value and identify its
patterns over time (eg. dumping waste into a water stream results in sudden changes in pH) to generate alarm
Minimize future risks
Practical solution to the issue of real time water quality monitoring
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FUTURE DEVELOPMENTS
The sensor device can be designed as a complete water quality measuring device by adding multiple sensors (eg. Bio sensors to detect Arsenic in water)
Handle multiple access of users
Security issues and the range of the network
Power saving strategy
Use of calibration-free pH probes
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THANK YOU
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