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This document proposes a mobile framework for real-time monitoring of pH levels in domestic water resources. A sensor device measures pH readings every 15 seconds using a pH probe and circuit. A WiFi module transmits the pH values to a mobile application over a wireless network created by the mobile device. The mobile app displays the pH levels in real-time numerically and graphically to track changes in pH over time. The system aims to provide low-cost, practical water quality monitoring.
Presentation opa
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- 2. 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 2
- 3. 3 pH stands for Potential Hydrogen Measures the acid/alkaline level in our water.
- 5. 5 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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- 7. 7 • 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
- 8. 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 taken Responsible for sending data to the sink node Sink node is the mobile device Collect sensed data Serve data to user 8
- 10. The sensor node Wi-Fi module (Hi Link HLK-RM04) Microcontroller board (Arduino Uno Board) 10 pH probe pH circuit
- 11. 11 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
- 12. Obtaining Measurements Readings are taken at every 15 seconds Output 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 12
- 13. 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 13
- 14. 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) 14
- 15. 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 15
- 16. Creating the network android.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 16
- 17. Graphical User Interfaces and Database four main GUIs 17 pH monitor pH history network settings
- 18. 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 18
- 19. 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 19 Cos of wireless communication modules
- 20. 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 20
- 21. 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 21
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