Difference between revisions of "S14: Android based home monitoring system"

Revision as of 16:43, 22 May 2014

Grading Criteria

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

1. Light and temperature monitoring of multiple rooms
2. Android application to view status of sensors

Team Members

1. Om Narasimhan
   • Software design and Android App development
2. Aysha Malik
   • Hardware interface design and integration
3. Sri Latha Ayyannagari
   • FreeRTOS driver design and development

Schedule

Parts List & 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.

• Communication protocol

<TODO>

Implementation

This section includes implementation, but again, not the details, just the high level. For example, you can list the steps it takes to communicate over a sensor, or the steps needed to write a page of memory onto SPI Flash. You can include sub-sections for each of your component implementation.

Testing & Technical Challenges

Describe the challenges of your project. What advise would you give yourself or someone else if your project can be started from scratch again? Make a smooth transition to testing section and described what it took to test your project.

Include sub-sections that list out a problem and solution, such as:

My Issue #1

Discuss the issue and resolution.

Conclusion

Conclude your project here. You can recap your testing and problems. You should address the "so what" part here to indicate what you ultimately learnt from this project. How has this project increased your knowledge?

Project Video

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Project Source Code

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References

Acknowledgement

Any acknowledgement that you may wish to provide can be included here.

References Used

Appendix

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