This Android application connects via Bluetooth to the an Arduino device that broadcasts pm2.5 concentration measurements.

Overview of Features

Bluetooth

* I added new features to the bluetooth functionality. The connection and
listening actions have been moved to a separate thread. This prevents
interruptions to the user. Once the user pairs a device, the device is
automatically added to the list of options. Selecting a device opens a live
data display. if connection is lost, the app returns to device selection.

Structural Features

* I implemented swipe navigation for the app. Three pages exist:
a pm2.5 sensor page, data history page, and an about page. I added buttons
to the swipe navigation feature to allow easier control depending on the
device that is used. The pm2.5 sensor page now has a moving graph that shows
the data updating live. A circle around the pm2.5 value changes color as
the value changes. A TextView provides a qualitative description of the value.
The bluetooth animation at the bluetooth connection screen was also created by me.

Data Storage Features

* I began implementing data storage, but this feature is only
partially complete. The data history page shows some data on a graph.
Although not complete, a lot of code now exists that allows read/write
to local storage.

EasyAir Application Organization

jake.laney.easyair

MainActivity.java - Top level activity

-> adapters

    BluetoothDevicesAdapter.java - ListView needs to display available devices
    
    SwipePageAdapter.java - Helps manage swipe navigation between fragments
    
-> fragments

    PMSensorFragment.java - Provides views for connecting/reading from the sensor
    
    PMHistoryFragment.java - Displays graphs of stored pm2.5 readings
    
    AboutFragment.java - displays an HTML page describing the app's features
    
-> pmbt (PM Bluetooth)

    PMBTConnectThread.java - thread for connecting/reading from the sensor
    
    PMBTDataModel.java - model for local storage of pm2.5 data
    
    PMBTFileService.java - provides read/write for local storage
    
    PMBTHandler.java - Handler for communication between UI and Bluetooth threads
    
    PMBTService.java - Provides a bluetooth connection service to the UI
    
    -> interfaces
    
        IPMBTDeviceManager.java - interface handling bluetooth events
        
        EnumPMBTDates.java - Dates used by the file system
        
        IPMBTConstants.java - constants used for thread messages
        
-> views

    CircleView.java - changes color with pm2.5 value
    
    LiveLineChart.java - updates as new data pm2.5 arrives
    
    HistoryLineChart.java - displays data from local storage
    
    StatusTextView.java - updates with pm2.5 to display quality of air

Sources

Charts/Graphing - https://github.com/PhilJay/MPAndroidChart

Bluetooth - https://developer.android.com/guide/topics/connectivity/bluetooth.html

Threading - https://developer.android.com/guide/components/processes-and-threads.html

Swipe Navigation - https://developer.android.com/training/implementing-navigation/lateral.html

PM2.5 Ranges - http://aqicn.org/faq/2013-09-09/revised-pm25-aqi-breakpoints/

Notes

The file storage infrastructure is only partially complete. It can open and read/write to the local data file. However, proper display with the PMHistoryFragment is not yet complete.