dWatch: a Personal Wrist Watch for Smart Environments


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Presentation given at the 3rd International Conference on Ambient Systems, Networks and Technologies
August 27-29, 2012, Niagara Falls, Ontario, Canada.
The paper is available on the PORTO open access repository: http://porto.polito.it/2496719/

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dWatch: a Personal Wrist Watch for Smart Environments

  1. 1. The 3rd International Conference onAmbient Systems, Networks and TechnologiesAugust 27-29, 2012, Niagara Falls, Ontario, Canada dWatch: a Personal Wrist Watch for Smart Environments Dario Bonino, Fulvio Corno, Luigi De Russis Politecnico di Torino, e-Lite Research Group http://elite.polito.it
  2. 2. Outline Motivations and goals Requirements Architecture Implementation Experimental results Conclusions ANT’2012, Niagara Falls, Canada 2
  3. 3. Motivations Human-Home Interaction ◦ traditional (buttons, switches, etc.) ◦ computer-based (apps, UIs, etc.) Needs to find a suitable trade-off ◦ unobstrusive ◦ instantly viewed or operated ◦ feature-rich and personalizable ◦ portable Wearable computing could be a solution ANT’2012, Niagara Falls, Canada 3
  4. 4. Our goals Present a reference architecture ◦ based on features and constraints sparsely defined in the literature Provide an implemented system ◦ based on open-source and off-the-shelf solutions ◦ cost-effective Use a wirst-watch as interaction means ANT’2012, Niagara Falls, Canada 4
  5. 5. Why a wrist-watch? a large fraction of population is already accustomed to wearing watches watches are less likely to be misplaced with respect to phones, tablets or other mobile platforms watches are more accessible than other devices one may carry the wrist is ideally located for body sensors and wearable displays ANT’2012, Niagara Falls, Canada 5
  6. 6. RequirementsContext sensors on board RequiredBody sensors on board OptionalSound emitter and haptics OptionalLocalization OptionalWireless communication RequiredLong-lasting battery life RequiredDisplay RequiredTouch-access (button) RequiredTouch-access (touch screen) OptionalAspect customization Optional, but typically wantedFunction customization Optional ANT’2012, Niagara Falls, Canada 6
  7. 7. Reference (logical) architecture Wrist watch Environment Visual Display (alert / messages Sound emitter Haptics Natural + (alert / messages) (alert / feedback) / feedback) Interaction Users (ubiquitous) Body Sensors Context sensors Communication Power (health (gesture recognition, system system monitoring) external conditions, ….) Bi-directional Wireless communication AmI system Communication system AmI interfaces (IHDs, etc.) Sensors (temperature, light, presence, water, etc.) Home Intelligence (learning, user profiling, reasoning, prediction, Actuators etc.) Natural (temperature, light, Interaction presence, water, etc.) (in-place) ANT’2012, Niagara Falls, Canada 7
  8. 8. Implemented architecture Wrist-worn device ◦ programmable and cost-effective wrist-watch by Texas Instruments (eZ430-Chronos) AmI system ◦ Domotic OSGi Gateway (Dog 2.3) ANT’2012, Niagara Falls, Canada 8
  9. 9. eZ430-Chronos capabilitiesContext sensors on board Required 3-axis accelerometer, pressure and temperatureBody sensors on board Optional It supports external heart rate monitorsSound emitter and haptics Optional BuzzerLocalization Optional NoWireless communication Required It supports the SimpliciTI and the BlueRobin protocolsLong-lasting battery life Required Multiple days, depending on the usageDisplay Required 96-Segment LCD displayTouch-access (button) Required 4 buttonsTouch-access (touch screen) Optional NoAspect customization Optional, but typically No wantedFunction customization Optional Yes ANT’2012, Niagara Falls, Canada 9
  10. 10. Wrist-watch implementation (I) A new firmware, in the C language, has been developed ◦ http://elite.polito.it/files/releases/dWatch_RFB SL.txt Client-server paradigm ◦ due to battery saving concerns, interactions take place either on a sporadic basis (every 30, 60 or 180 seconds) or manually ANT’2012, Niagara Falls, Canada 10
  11. 11. Wrist-watch implementation (II) New functionalities added ◦ message handling ◦ quick access command ◦ gestures (still under development!) Two main menus available to users Qac ANT’2012, Niagara Falls, Canada 11
  12. 12. Dog 2.3 A software-based home gateway with ◦ high-level semantic device modeling ◦ driver architecture that allows to support different technologies Open-source OSGi-compliant Website: ◦ http://domoticdog.sourceforge.net/ ANT’2012, Niagara Falls, Canada 12
  13. 13. TI Driver for Dog 2.3 Added a driver for the eZ430-Chronos watch ◦ to support the watch features (original and implemented) ◦ to implement the server-side of the wireless communication ◦ included in the online version of Dog ANT’2012, Niagara Falls, Canada 13
  14. 14. Experimental results (I) Goal: evaluate the watch functions and the possible adoption scenarios 4 participants ◦ 2 females and 2 males (aged between 35-46) ◦ only one works in the computer science field ◦ all of them habitually wear a wrist watch During the evaluation, Dog sent to the watch two different messages: ◦ a request to turn off a lamp ◦ a warning message ANT’2012, Niagara Falls, Canada 14
  15. 15. Experimental results (II) Grade given to the watch: 3.5 (out of 5) Participants ◦ would use such a system both in their homes and workplaces ◦ found the watch menus easy to navigate and to use, but only after an initial explanation ◦ were interested in controlling their home appliances with the watch ◦ would spend 20-40 euros to buy a watch with such features ANT’2012, Niagara Falls, Canada 15
  16. 16. Conclusions Presented requirements for a wrist-worn human- home interface Proposed an initial, low-cost implementation based on an off-the-shelf watch, and on open source components Preliminary user test confirms the functionality of the system and the viability of the approach Interesting aspects emerging from user testing involve both the device price, and the wish to adopt the watch both in the home and in the work environment This last observation confirms the unobtrusiveness of the approach and fosters future investigation about the possible uses of such a device ANT’2012, Niagara Falls, Canada 16
  17. 17. Thank you for your attention! Luigi De Russis luigi.derussis@polito.it ANT’2012, Niagara Falls, Canada 17