---
title: "Pebble SDK 2.0 BETA4 - Changelog"
canonical_url: https://developer.repebble.com/sdk/changelogs/2.0-BETA4/
last_updated: 2025-07-20
sdk_version: 4.33.1
---
# Pebble SDK 2.0 BETA4 - Changelog

Source: https://developer.repebble.com/sdk/changelogs/2.0-BETA4/

_Release Date: December 23 2013_

- Pebble SDK 2.0 is currently in BETA and intended for developers only.
- SDK 2.0 will be released early next year as an over-the-air update to all Pebble users.
- Applications written for Pebble 1.x are not compatible with SDK 2.0
- If a 2.0 version of an application exists, the Pebble mobile applications will automatically install it when when a user upgrades her/his Pebble.

**You can start uploading your application to the Pebble appstore TODAY - [Please do so](https://developer.repebble.com/dashboard)!**

## What has changed since BETA3

Overview:

- Fixed a problem where the iOS app would get killed after a few minutes in the background
- Lots of Data Logging fixes on the firmware and on Android
- Added timestamps on accelerometer samples
- Improved error handling for PebbleKit JS apps on iOS and Android

### Firmware

- Developers of apps can now register single and multi click handlers on the back button
- Holding down the back button for 1.5s will force quit an existing app
- Fixed bugs and optimize the filesystem: faster persist times, less problems with persistent storage, fix a bunch of rather complex problems where the recovery firmware could be damaged
- Fixed scroll offset bug when displaying notifications
- Dismiss missed call notfication after 180s
- Fixed a bug where unicode characters were not supported in appinfo.json
- Changed graphics\_text\_layout\_get\_max\_used\_size() to _not_ require a graphic context
- Fixed a few more bluetooth bugs
- Fixed a bug where Pebble could crash when you delete the last alarm
- Fixed memory read exception that can occur when using a malloc-ed appsync buffer
- Save notifications to storage during do not disturb
- Document AccelAxisType in API Documentation
- Fixed Music UI problems
- Automatically center on screen a selected cell in a SimpleMenuLayer
- Fixed bug where snprintf could crash the watch
- Display an error message if a 2.0 pebble is connected to a 1.x mobile app
- Fixed a bug where calling atoi() would crash an app
- Many DataLogging improvements and fixes based on new unit tests
- Display an alert on Pebble when we reset due to a system crash
- Ignore NULL pointer passed to text\_layer\_destroy()
- Limit the number of datalogging sessions to 20
- Fixed a race condition that occurs when you set the sampling rate immediately after subscribing to the accel service
- Keep persistent storage intact when upgrading an application
- Added timestamps on accelerometer samples and a flag indicating if the watch was vibrating at the time of the sample
- Fixed a bug where psleep could crash pebble
- Fixed a bug where text\_layer could add ellipsis to the wrong line

### iOS App

- Fixed a bug where the iOS app would get killed in the background after just a few minutes
- Show a local notification if a developer is connected but the app is about to get killed
- PebbleKit JS: Fixed a bug where apps could not access localStorage with the array syntax
- PebbleKit JS: Fixed a bug where a space in an URL opened with XmlHTTPRequest could crash the iOS app
- PebbleKit JS: Fixed a bug where sending a byte array with 0xff in it would send 0x00 instead

### Android App

- PebbleKit JS: Fixed a bug where a byte array would not be sent properly for named keys
- Use new Android KitKat (4.4) APIs to do pairing on 4.4
- PebbleKit JS: Do not send ack for ack/nack messages
- Fixed Android crashing with OutOfMemory error when using Data Logging
- Fixed Android Data Logging of byte array that was not working

### PebbleKit iOS

- Do not ack ACKs...

### PebbleKit Android

- No changes

### SDK Tools

- Added support to libpebble to trigger reboot to recovery firmware
- Added support for computers where python2 and python3 co-exist
- Fixed an exception when receiving APP\_LOG with extended characters
- Fixed a bug where unicode characters were not supported in characterRegex field of `appinfo.json`
- Fixed 30 second delay that can occur when building pebble apps on Ubuntu when there is no internet access
- Added Pillow python dependency: needed for the screenshot functionality
- Detect PIL/Pillow conflict and suggest a fix to the user

### Examples

- Added a License to the examples