https://archive.is/mrfc9

As we informed you early this year, Google was open-sourcing the code for Pebble watches, making about 95% of the software available to the community. The last 5%—the mobile app—remained closed. That’s now changed with the announcement of Eric Migicovsky, the founder of Pebble and the person leading its 2025 relaunch under his new company, Core Devices.

As of this week, the entire software stack behind modern Pebble watches, including PebbleOS, the mobile companion app, developer tools, and the Pebble Appstore backend, is now fully open source.

The new open-source mobile app is central to that change. When the original company shut down, Pebble users faced a significant problem: without a companion app, the watches were effectively unusable.

Pebble, the e-ink smartwatch with a tumultuous history, is making a move sure to please the DIY enthusiasts that make up the bulk of its fans: Its entire software stack is now fully open source, and key hardware design files are available too.

Pebble creator Eric Migicovsky announced the move on Monday in a blog post and video detailing the changes his reborn Pebble watchmaking firm has undertaken, and they're considerable.

Yesterday i charged my pebble c2d for the second time. Got the watch at 80% charged it to 100% then drained to 30% over 12 days, then charged it up to 62%.

What's weird is after charging, my reported battery kept going up even when not on the charger. It was at 74% 8 hours later. I restarted the watch and it showed 88% immediately and then has since dropped to 87%. Anyone have any idea what happened here?

Edit: Guess I can answer my own questions with some research. Love having access to the source. Older watches use a linear voltage table with some debounce logic. These new nrf based devices use Nordic's fuel gauge library with coulomb counting. So, it's an adaprive algorithm that learns over time. Only issue is calibration takes discharge cycles, but with a watch that discharges over weeks, not days, that can take a while as I'm on only my second discharge cycle, and even then not a 100% cycle. Oh pebble problems ;)

I'm guessing if i had waited for a full charge that also would have helped.

Source: src/fw/services/common/battery/nrf_fuel_guage/battery_state.c

• https://www.reddit.com/r/pebble/comments/1p0huk5/pebble_rebble_and_a_path_forward/
• https://news.ycombinator.com/item?id=45969250

• Yesterday, Pebble watch software was ~95% open source. Today, it’s 100% open source. You can download, compile and run all the software you need to use your Pebble. We just published the source code for the new Pebble mobile app!
• Pebble Appstore now has a publicly available backup and supports multiple feeds, providing long term reliability through decentralization. We’ve launched our own feed and Developer Dashboard.
• Pebble Time 2 schedule update (aiming to begin shipping in January, with most arriving on wrists in March/April)
• New Tick Talk episode #4 is up, with Pebble Time 2 demos!

• https://www.reddit.com/r/pebble/comments/1p5ojht/blogpost_pebble_watch_software_is_now_100_open/
• https://news.ycombinator.com/item?id=46037626

I really want Pebble back but it's not Eric's it's ours it's open source. If Eric wants to make devices that are compatible and extend the platform I'm in support. But it can't be his because he sold it 9 years ago.

I hope he can see that the best way forward is to treat the os like Linux and then build is devices to work with that OS and platform.

Update: https://ericmigi.com/blog/pebble-rebble-and-a-path-forward

Eric made a blog post that has some great responses but also uses some divisive language that unfortunately wont help the situation. Its clear that both sides mean well, there are just some personality conflicts that need to be sorted out because its not their platform. Its ours.

• Android: Fix a bug which prevented new pairing to a Pebble/Pebble Time watch
• Handle PBW cache being cleared while running
• Prevent headers overlapping content on settings screen
• Android: Handle disconnection event while waiting to pair (previously would hang for 60 seconds)
• Improve firmware update check error message when not logged into Rebble on legacy devices

So far everything is working and I will update if that changes!

It's so exciting having a bit of technology this old still working still getting support. More tech needs to be this well done.

Haven’t seen this mentioned here yet, so good news for all iPhone users who are still wearing their Pebble. Enjoy the first and greatest of all smart watches, in full glory even in 2025!

TL:DR

• Production Updates
• (re)Introducing the Pebble Appstore
• Partnered with Rebble
• New and improved
• (re)Start building apps/faces
• Mobile app sneak peek

I feel so naked and my tan line are showing!

It's only been back operational a little while and it's already an extension of me that I notice when gone.

I managed to use ADB to sideload the pebble app. When I go to configure the calendar application it says enable all, but the rest of the screen is blank.

When I look a my timeline on the watch I get the no events sloth :(

Anyone run into issues like this?

I ordered a replacement battery of eBay and followed along with the ifixit guide and somehow did not kill my probably l Pebble!

https://www.ebay.com/itm/266822720719

https://www.ifixit.com/Guide/Pebble+Steel+Battery+Replacement/53227

I followed the advice in the comments and did not desolder the old ribbon first but cut it and then soldered the new leeds to the PCB.

I have at best adequate skill so as long as you take your time and go slow with the adhesive it's something that can be done.

Still works to this day, the battery is shot so its at best 2days, but man what other smart watch still works and still is connected to my phone 8 years after I got it.

Most people with Apple watches have had to replace them since their first or second gen dont get updates.

Eric just released a new video and blog post reveling the updated design and its more like the old Pebble Time Steel, and less like the Kickstarter Pebble design.

I for one LOVE it, and put down my $$$ for a pre-order.