S14: Android based home monitoring system
Contents
Grading Criteria
- How well is Software & Hardware Design described?
- How well can this report be used to reproduce this project?
- Code Quality
- Overall Report Quality:
- Software Block Diagrams
- Hardware Block Diagrams
- Schematic Quality
- Quality of technical challenges and solutions adopted.
Android based home monitoring system
Abstract
The home monitoring system is designed to monitor light and temperature of different rooms. The monitoring system will monitor light and temperature of different rooms and report the status to the user via an android application.
Features
- Light and temperature monitoring of multiple rooms
- Android application to view status of sensors
Team Members
- Om Narasimhan
- Software design and Android App development
- Aysha Malik
- Hardware interface design and integration
- Sri Latha Ayyannagari
- FreeRTOS driver design and development
Schedule
| Sl. No | Start Date | End Date | Task | Actual |
|---|---|---|---|---|
| 1 | 2/28 | 2/28 | Order Components and Make a schedule | Completed) |
| 2 | 3/1 | 3/10 | Components Procurement. | Completed (03/06/2014) |
| 3 | 3/6 | 3/6 | Identify tasks assign work | Completed (03/06/2014) |
| 4 | 3/6 | 3/13 | Study about bluetooth module and its interfacing | Completed |
| 5 | 3/6 | 3/13 | Learn application development using Android, Complete hardware interfaces | Completed |
| 6 | 3/13 | 3/18 | Finish software design and conduct reviews | Completed |
| 7 | 3/18 | 4/8 | Develop App to establish communication b/w bluetooth device android device, Add component in app to discover available devices,Develop SPP emulator for android app | Completed |
| 8 | 4/8 | 4/18 | working on developing data transfer protocol and communicating with multiple devices at the same time | In progress |
| 9 | 4/18 | 4/25 | Integrate code and start testing | Not yet started |
| 10 | 4/25 | 4/30 | Resolve issues if any | Not yet started |
| 10 | 4/30 | 5/3 | Final Testing | Not yet started |
Parts List & Cost
| Qty | Description | Manufacturer | Part Number | Total Cost |
|---|---|---|---|---|
| 3 | SJOne Board | SJSU | - | $240.00 |
| 3 | 2013 Bluetooth Master UART Board Communication Module- 4 Needle Blue | $22.50 | ||
| 1 | Samsung Galaxy S4 | Samsung | - | |
| Total Cost | ! |
Design & Implementation
The design section can go over your hardware and software design. Organize this section using sub-sections that go over your design and implementation.
Hardware Design
Discuss your hardware design here. Show detailed schematics, and the interface here.
Hardware Interface
In this section, you can describe how your hardware communicates, such as which BUSes used. You can discuss your driver implementation here, such that the Software Design section is isolated to talk about high level workings rather than inner working of your project.
Software Design
Parameters are monitored by devices placed in each room. The monitoring device communicates to android application using Bluetooth. The application records incoming data from different devices and continuously analyses it. Interpretation of the data can either be done in real time or at fixed intervals and logical decisions are taken (e.g, no motion sensor update for X minutes, so switch off lights, or based on the historical data, switch on lights at a particular time ..etc)
- Application GUI
We implemented the Application GUI in three parts
● The first screen for application is for home station selection
○ <insert screenshot here>
● As you can see in the screen shot, there are three buttons to select among three home stations. Upon selecting a weather station (denoted by “roomX”, X => 1, 2, and 3), the application establishes a connection to the Bluetooth agent in the weather station. ● Once connection is established, the status is shown to the user as “connection established” or “connection failed”
● There are 4 different buttons viz,
Current temperature Read the current temperature
Current luminosity Read the current luminosity
Historical temperature Historical temperature data and graphs
Historical luminosity Historical luminosity data and graphs
○ <Insert screen shots for all these four here>
● Graphing method
○ Our graphics are primarily based on the library “androidplot” downloadable from (www.androidplot.com)
○ AndroidPlot is a very powerful package to plot graphs. The input for graphing method are two arrays of type Number. To plot an XY graph, these numbers are converted to XY-Series data type and use a LineandPointFormatter class. Once X-axis plane is fully plotted, another series will be used to plot Y- axis plane.
- Application configuration
<TODO>
- Data Analysis
<TODO>
- Data structures
Every board gathers temperature and Luminosity samples at fixed intervals. The interval is configurable and default is set at 5sec. Initially, our first choice was to use a FIFO for storing these readings. But then, it became very difficult to discard older entries. Although we planned to have a timeout mechanism associated with every entry, later we figured out that a FIFO implementation based on a circular buffer would be easier to implement and maintain.
Here is a graphical representation of our FIFO based on a circular buffer.
<insert pic here>
- Communication protocol
<TODO>
Implementation
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Testing & Technical Challenges
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Include sub-sections that list out a problem and solution, such as:
My Issue #1
Discuss the issue and resolution.
Conclusion
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Project Video
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Project Source Code
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References
Acknowledgement
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References Used
Appendix
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