This document provides an overview and introduction to overlays and libraries for the Pebble smartwatch platform. It discusses the benefits of sharing code through libraries, how overlays allow combining multiple components, and examples of existing and upcoming projects that utilize overlays and libraries. The presenters provide contact information and links to GitHub repositories for following up on implementation details and working examples.

1. Overlay (& Libraries )
Ron Ravid & Grégoire Sage
October 2nd 2014

2. Presented by:
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3. Today & Tomorrow
 Today: General Overview
 Tomorrow: Details on implementation
 Farther information:
- GitHub – ron064 – PPOSDemo
- GitHub – gregoiresage – pebble-demos

4. Existing examples
Current
 Finally
 Display Generator
 PPOSDemo
(GitHub: Ron064)
 Pebble Demos
(GitHub: gregoiresage)
Near Future
 Earth (map)
 Timely
 Pebble Bike

5. Display Generator:
Composing various watchfaces by user selection

6. Libraries (1/3) - code
It is not complicated to build a Library.

7. Libraries (2/3) - Advantage
 Sharing libraries : Advantage to pebble over
other platforms.
 Focus on your strength
 A company may pay developer for his library
in commercial usage.

8. Libraries (3/3) - usage
 A watchface built as a library, can be used
by different developers.
 Application can include several libraries from
different developers
 Examples
- Activity tracker
- Gesture recognition
- Several remote control systems together
- Components like battery/communication.

9. Overlay
 What is it?
 Overlay allows putting more things together

10. Overlay memory map example

11. Basic concept of overlay
 Loading code or code+data before usage,
 Attention to init/deinit
 Care for memory usage. (overlay size)
 Several adjustments are needed

12. Overlay – build script
 Overlay requires special build script.
 Currently automatic triple compilation

13. Overlay – Future ToDo
 Add debug option,
 Improve build process

14. Next
 Information is available online
- GitHub – ron064 – PPOSDemo
- GitHub – gregoiresage – pebble-demos
 Workshop Tomorrow
 Open source projects that will be converted
- Timely
- Pebble Bike