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WiRun
The document describes WiRun, an app that uses WiFi signals to monitor a user's location and sitting duration in order to encourage breaks from prolonged sitting. It does this by vibrating the phone and tracking whether the user has left the room or building when a long sitting period is detected. The app design leverages dense WiFi environments to determine location changes. It includes components for location monitoring, break time monitoring, activity challenges and logging history. The implementation works by periodically scanning for WiFi access points and comparing the current list to previous ones to detect location changes without relying on GPS.
WiRun
- 1. WiRun: You’ll needa break! 20114262: Nam Giang KSE631@Kaist
- 2. Motivation Sitting toolong could present you a cancer for free. Sitting too long makes people obese How long is too long? What is limit for a day?
- 3. Motivation Changing yourbehavior: GET UP! But, it could be hard for lazier! WiRun can help
- 4. Algorithm Leverage densityWi-Fi environment at offices
- 5. Design Wi-Fi-based LocationMonitor Break time monitor Activities challenges Walk out of room Walk out of office Activities log
- 6. Design: Activities MainActivity Set upAlarm Manager Display sitting duration SettingsActivity Configure user’s preference HistoryActivity Display user’s historic places where long sitting takes action MapActivity Display a MapView for Historic places
- 7. Design: Application workflow Service: LocationMonitor Monitor location change by watching surrounding Aps list BroadcastReceiver: WifiReceiver +Receives Wi-Fi scan result +Updates Aps and History database +Monitor location change +Monitor break time duration BroadcastReceiver: AlarmReceiver Start/Stop LocationMonitor service BroadcastReceiver: BootReceiver Start monitoring at boot Runable: WifiScanner Scan Wi-Fi for every short scan periods Determine when to check for location SQLite Database +Aps list +Historic Places ContentProvider: WirunDbProvider Load database records to History activity
- 8. Design: Wi-Fi-based Location Monitor Short scan period: scan every 30s and accumulate the Aps to Aps lists to increase accuracy (deal with mobile’s Wi-Fi device’s instability) Long scan period: every 15- 30min, perform a short scan period After a long scan period reach, start checking location change by comparing old Aps list and new Aps list
- 9. Design: Wi-Fi-based Location Monitor If location has changed, reset the application and monitor again for long sitting period If location has not changed, check whether or not long sitting period is reached. If reached, start break time by vibrating the phone, monitoring strongest AP level to determine location change, therefore stop vibrating when user is out of room or building.
- 10. Design: Wi-Fi-based Location Monitor Whenlong sitting period is reached in a location, update historic database for such location. After break time period, reset the application and start monitoring again
- 11. Design: Break timemonitor Start Wi-Fi scan for every 10s to determine user location change Location change is monitored by monitoring last strongest AP level After some number of scans (called “fun number”, users do not tend to comeback to their seat, i.e., they’re already enjoy their break) increase Wi- Fi scan duration to 30s to save batery
- 12. Design: Activity challenge Walkout of Room: monitor the level of last strongest AP Walk out of building: check whether or not there is no AP in scan result list
- 13. Design: Historic places Everytime location not change is known, record date, place and sitting duration into history database
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- 17. Trivial The vibrator codeis Morse code with dot: short vibrate, dash: long vibrate, short gap between dot and dash, medium gap between letters, and long gap between words The translated Morse code is “get the hell out of there!”
- 18. Thank you fora great course! Do you have any comments or questions?