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111 lines
3.9 KiB
Markdown
111 lines
3.9 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: Announcing Pebble SDK 4.0
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author: jonb
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tags:
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- Freshly Baked
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---
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Today we have the pleasure of announcing the release of Pebble SDK 4.0. We have
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published an updated version of the Pebble Tool, the SDK itself, and we've
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deployed 4.0 onto [CloudPebble]({{ site.links.cloudpebble }}). It's time to get
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busy!
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## What's New
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Pebble OS 4.0 has been released and users with Pebble Time, Pebble Time Steel
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and Pebble Time Round will be receiving the update today.
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We covered the new features in detail
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[very recently](/blog/2016/08/19/prime-time-is-approaching-for-os-4.0/), but
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let's have a quick reminder of the new APIs and functionality that's included.
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### Rocky.js
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Javascript on the freakin' watch! Although still in beta,
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[Rocky.js](/docs/rockyjs/) lets you start developing watchfaces in JavaScript
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using standard Web APIs, which you can then run directly on your watch. It's an
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embedded JavaScript revolution!
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Read the updated
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[Rocky.js blog post](/blog/2016/08/15/introducing-rockyjs-watchfaces/)
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to get started.
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### Timeline Quick View
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Timeline Quick View displays upcoming information from your timeline on your
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watchface. We introduced the ``UnobstructedArea`` API to allow developers to
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detect if the screen is being obstructed by a system modal, such as Timeline
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Quick View. Developers can use this new API to adapt their watchface layout
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according to the available screen real estate.
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Read the {% guide_link user-interfaces/unobstructed-area "UnobstructedArea guide" %}
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to get started.
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### AppGlances
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With the new ``AppGlance`` API, developers can dynamically change the icon and
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subtitle of their watchapp within the system launcher, at runtime. This allows
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developers to provide meaningful feedback to users without the need for their
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application to be launched.
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Read the
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{% guide_link user-interfaces/appglance-c "AppGlance C guide" %} and the
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{% guide_link user-interfaces/appglance-pebblekit-js "AppGlance PebbleKit JS guide" %}
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to get started.
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### Diorite Platform
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The new Pebble 2 devices use apps built for the Diorite platform, so you'll need
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SDK 4.0 to develop applications which target those devices.
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Take a look at the
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{% guide_link tools-and-resources/hardware-information "Hardware Information guide" %}
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to find out about the capabilities of the Pebble 2.
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### One Click Action application
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The One Click Action application pattern promotes a type of watchapp which
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serves a single purpose. It launches, performs an action, and then terminates.
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This pattern utilizes the new ``AppGlance`` and ``AppExitReason`` APIs.
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Take a look at the
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{% guide_link design-and-interaction/one-click-actions "One Click Actions guide" %}
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to get started.
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## Dude, Where's my HRM API?
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We had planned on shipping the Heart Rate API with 4.0, but it's been pushed
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back into 4.1 so that we can add even more awesomeness. Pebble 2 devices will
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begin to appear on wrists after firmware 4.1 ships, so you'll still have time to
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begin implementing HRM data into your watchapps and watchfaces. We will announce
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details of the HRM API as soon as it's available.
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## What's Next
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Please remember that we will promote watchfaces and watchapps that make use of
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these new 4.0 APIs if you submit them to the appstore **from August 31st
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onwards**.
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Let us know on [Twitter]({{ site.links.twitter }}) if you build something
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cool using the new APIs! We'd love to hear about your experiences with the SDK.
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Happy Hacking!
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Team Pebble
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