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72 lines
2.5 KiB
Markdown
72 lines
2.5 KiB
Markdown
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---
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# Copyright 2025 Google LLC
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#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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title: Smartstraps
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description: |
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Information on creating and talking to smartstraps.
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guide_group: smartstraps
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menu: false
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permalink: /guides/smartstraps/
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generate_toc: false
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hide_comments: true
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related_docs:
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- Smartstrap
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related_examples:
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- title: Smartstrap Button Counter
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url: https://github.com/pebble-examples/smartstrap-button-counter
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- title: Smartstrap Library Test
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url: https://github.com/pebble-examples/smartstrap-library-test
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---
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The smart accessory port on the back of Pebble Time, Pebble Time Steel, and
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Pebble Time Round makes it possible to create accessories with electronics
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built-in to improve the capabilities of the watch itself. Wrist-mounted pieces
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of hardware that interface with a Pebble watch are called smartstraps and can
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potentially host many electronic components from LEDs, to temperature sensors,
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or even external batteries to boost battery life.
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This section of the developer guides details everything a developer
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should need to produce a smartstrap for Pebble; from 3D CAD diagrams, to
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electrical characteristics, to software API and protocol specification details.
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## Contents
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{% include guides/contents-group.md group=page.group_data %}
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## Availablility
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The ``Smartstrap`` API is available on the following platforms and firmwares.
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| Platform | Model | Firmware |
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|----------|-------|----------|
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| Basalt | Pebble Time/Pebble Time Steel | 3.4+ |
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| Chalk | Pebble Time Round | 3.6+ |
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Apps that use smartstraps but run on incompatible platforms can use compile-time
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defines to provide alternative behavior in this case. Read
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{% guide_link best-practices/building-for-every-pebble %} for more information
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on supporting multiple platforms with differing capabilities.
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## Video Introduction
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Watch the video below for a detailed introduction to the Smartstrap API by Brian
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Gomberg (Firmware team), given at the
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[PebbleSF Meetup](http://www.meetup.com/PebbleSF/).
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[EMBED](//www.youtube.com/watch?v=uB9r2lw7Bt8)
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