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devsite/source/_changelogs/3.0-dp4.md

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+---
+# Copyright 2025 Google LLC
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+title: Pebble SDK 3.0-dp4 - Changelog
+date: 2015-03-19
+---
+
+This is the fourth Developer Preview release of Pebble SDK 3.0.
+
+## Detailed List of Changes:
+
+### Changes for Firmware:
+
+* Added basic timeline interface for testing and development purposes.
+  **This is not the finished timeline UI**.
+* Pressing the up/down button from the main emulator screen will now open the
+  timeline.
+* Made the generic, sports, weather and calendar layout available to timeline
+  pins (see the [timeline guides](/guides/pebble-timeline/) for more information).
+  
+### Changes to SDK:
+
+* Fixed ``property_animation_clone()`` compatibility macro (for Aplite binaries).
+* Added ``launch_get_args()`` for getting the `launchCode` attribute from an
+  [`openWatchApp`](/guides/timeline/pin-structure/#pin-actions) timeline pin
+  action.
+
+### Changes for SDK Tools:
+
+* Emulator now has the proper timezone set automatically (in firmware and in
+  JavaScript).
+* Added the `insert-pin` and `delete-pin` commands to the emulator to interact 
+  with the timeline locally.
+* Added the `pebble login` command to connect your emulator to your Pebble
+  account. *This is required for the timeline to work*.
+* Fix a bug where the build would fail if the project contains a space in 
+  the name.
+* The [`targetPlatforms` attribute is now supported on resources](/guides/app-resources/platform-specific/). 
+  You can use it to specify that a resource should only be available on one platform.
+
+#### Known Issues
+
+The timeline will not work if you have Python 2.7.8+. Please use Python 2.7.6 if
+you want to work with the new timeline APIs.
+
+### Changes for Examples:
+
+Examples have been removed from the SDK download, and our old examples
+repository has been deprecated.
+
+You can now find all our examples on
+[pebble-examples on GitHub]({{site.links.examples_org}}/).
+
+### Changes for Documentation:
+
+*No changes*