OpenFit: Open source Gear Fit application - Samsung Gear Fit

Hello XDA, I am updating this post to now reflect that this thread is a development thread versus a general thread.
What is OpenFit?
OpenFit is aimed to be an open source alternative to the Gear Fit Manager (which cannot be run natively on non-samsung devices), with hopes that it will provide most/all of the features provided by the Gear Fit Manager app and possibly even more. That being said, this application is in early development and lacks a lot of features.
What can it do?
Connect to the Gear Fit
Auto Connect
Sync time with the Gear Fit
Toggle 12-Hour/24-Hour clock
Media Controller
Alarm notifications (stock android clock app, cannot dismiss alarm from Gear Fit)
SMS notifications
MMS notifications (does not show mms content)
Weather notifications (currently only english support)
Weather clock style
Phone calls notifications
Reject phone calls (quick reply doesnt work yet)
Find device
Email notifications (does not grab the contents of email, that data is protected)
3rd party apps notifications
Pedometer data
Google Fit Sync
This app was developed using firmware: R350XXU0BOA2
Download from Google Play: Open Fit
How to install:
Download from google play
Run OpenFit application
How to upgrade/downgrade firmware:
Tutorial provided by user: @LilLowEK
Tutorial here
How to debug:
Install and Open CatLog app (Free on google play)
Press Menu key on you phone to bring up the record button
Press record and when prompted for file name, add filter with text 'OpenFit'
Press okay, it will begin to record logs for OpenFit.
Perform the action you are trying to debug (try doing it a few times, this helps me figure out the cause of bug)
When completed, stop the recording by tapping on the CatLog notification.
Email or pm me the logs so I can try fixing the bug
Github: https://github.com/jareddlc/OpenFit
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How did I make OpenFit
The first thing i decided to do, was to try to research on how the phone and watch communicated. For this I enabled Bluetooth HCI snoop log in the developer options in the CM rom. This would log all traffic from bluetooth. I factory reset my watch and then connected it with the Gear Fit Manager app. I sent/received a test messages, using custom apps and text messages. I then stopped logging bluetooth traffic, and began inspecting the logs using wireshark. For each new connection after a factory reset of the watch, the Gear Fit Manager checks to see if a Firmware update is available and then sends most of the data to the watch; updated texts, images, predefined text etc. Then shortly after I began seeing the logs for the text messages and custom messages. For text messages, nothing was needed, but for custom messages, the app will send to the watch the image of the app along with some metadata, such that the watch can now receive the custom type message (think facebook messenger). So now that I had a nice data set to work with I tried connecting to the watch using androids BLE connections, but I could not connect successfully with it, and so I tried using the BT RFcomm and that worked (I can try to revisit BLE, now that I have more knowledge). Now that I can connect, I tried sending messages (messages from the BT snoop log), however I didnt have any success with this. I realized on each connection, the watch will require a message as a handshake and to my surprise the message was "ODIN" (Samsung's software to flash firmware). After I sent the "ODIN" message, that watch now acknowledge OpenFit and would accept incoming messages. Shortly after I was able to figure out the protocol for sending messages to the watch specifically, setting time and sending a general message. For each type of message, the packet that is sent is different, which is why it time consuming to figure out how to send a particular message. This is where I currently am in the development, I was only able to get this far by using the BT snoop log in conjunction with a decompiled Gear Fit Manager app which I used as a reference. If you have any specific questions feel free to ask.

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Hi!
The idea is good, but with this thread:
http://forum.xda-developers.com/gear-fit/general/diy-gear-fit-samsung-devices-lollipop-t3004234
I've been able to make it work on my Nexus 5 on Lollipop.
Maybe the real need is a open community that work on official gear fit manager and patch it, or develop a script to auto patch the last release of the apk!

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I think that a open source project is a good idea. The original gear fit manager has too many problems and limitations (with non Samsung device).

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garsim said:
I think that a open source project is a good idea. The original gear fit manager has too many problems and limitations (with non Samsung device).
Click to expand...
Click to collapse
yes ! i think like this .... make a new app for managing and make connection to non samsung devices please .... think this is a good way ....
hope for the release soon
will follow the thread !!!

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This is not a development thread yet, so it's good to keep it here to get some attention.
Once you start to develop something, you should post it in the development section, otherwise it'll be overrun by "general" posts and threads.
Good initiative though!

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I would use it, especially if alarms could work. I bought it knowing its limitations with non samsung devices, but nothing has happened so I'm not using the thing as much as I could

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Thanks, @NeoS I'll only post in Dev if I can get a connection with the gear working.

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Get fitness sensors data from GF
It would be great to have data extracted from the device. For example it would be a good idea to import data into Google Fit application or just store it to an Excel file.
So I vote "yes" for this reverse engineering project. :good:

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MagXDA said:
It would be great to have data extracted from the device. For example it would be a good idea to import data into Google Fit application or just store it to an Excel file.
So I vote "yes" for this reverse engineering project. :good:
Click to expand...
Click to collapse
:good:It would be definitely good for the non-samsung users like me. Hope we can get GT to work with other fitness app as well.

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i would to try this app but i need an apk to install it on my device

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would love an open source app!!!

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Very good idea, I would like to test your .APK in the future.

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I would love to see this happen, getting this to do more and open it up and getting more out of it that samsung never planned would be awesome!!:good:

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Sorry guys, I'll try to resume working on this.
Hey guys, thanks for all the positive feedback. sorry I havent worked on the app for a long time, I stopped at when trying to learn how to connect to the device, and then got very busy as I am working on multiple projects and work. I'll try to figure out how to connect to the device via this app. I'll also try to update to the latest firmware to see if anything has changed or become easier. I would be more than willing to accept anyone who would like to help out. :good:
I am also using strava app alot, and google fit, and would love to see if i can get metrics from the device and use it to sync with google fit

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Galaxy Tab tester
This is a great idea!
I would love to sync my Gear Fit with my Galaxy Tab 4 using an app that works. Gear Fit pairs with the Tab, but the data won't sync, even though Samsung apparently included the Tab as a compatible device...
I've had limited success with the EndoMondo app, but EndoMondo doesn't seem to pull any data from Gear Fit's native software. I also saw a Youtube video that mentioned the 'Lose It' app worked with Gear Fit, but I did not have any success there either...
Looking forward to seeing where this goes.
Cheers,

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jareddlc said:
Hey guys, thanks for all the positive feedback. sorry I havent worked on the app for a long time, I stopped at when trying to learn how to connect to the device, and then got very busy as I am working on multiple projects and work. I'll try to figure out how to connect to the device via this app. I'll also try to update to the latest firmware to see if anything has changed or become easier. I would be more than willing to accept anyone who would like to help out. :good:
I am also using strava app alot, and google fit, and would love to see if i can get metrics from the device and use it to sync with google fit
Click to expand...
Click to collapse
I'd like to help in anyway I can. I use a Nexus 5 and a Gear Fit. and have access to a Stock Galaxy S3. Unfortunately I don't know Java, but I do know some C++, and QML. Are you only planning on re-implementing the Gear Fit Manager? Or are you thinking about maybe working on more the fitness features side? Or both? PM me if you want to work together on this, I'm generally pretty good at figuring things out. I remember I looked into the Fitness with Gear side more than the Gear Fit Manager Side, rather than the Gear Fit Manager side. It might be interesting to look at libpebble, since Hexxeh basically did what we need to do except for a different device. I think it'd be nice to try to write an app in such a way it's easily portable to other platforms. (I personally really like sailfish...)
Unfortunately I also work, and am generally pretty tired by the end of the day.
Thanks, Core2idiot

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thanks @Core2idiot, I left off on actually trying to make a connection with the device. Like you said, Its hard getting started once you've gotten stuck. But i'll try my best to get back on it

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Sorry
jareddlc said:
thanks @Core2idiot, I left off on actually trying to make a connection with the device. Like you said, Its hard getting started once you've gotten stuck. But i'll try my best to get back on it
Click to expand...
Click to collapse
Sorry I'm new... but just to be sure... is possible use Aerlink: Wear Connect for iOS on Gear Fit with any pc program. Or use Ble Utility for connect it on iPhone? Because when I try the App always disconnects.

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@becket As far as my testings, you cannot connect to the Gear Fit, using any of the tools on the market such as BLE testers. I think I am "near" getting the connection paired. When you first connect your device, is shows your a security pin, both on phone and on watch. I am what I think close to figuring out how to do that. I have a bunch of decompiled files Im looking trough so its not fun. But hopefully I can figure it out.

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I think I successfully connected(paired) with the device. I was trying to do it with Bluetooth low energy, but turns out, The first time needs to be done with the old Bluetooth protocol! I have yet to still find out how to convince the gear fit that i am gear fit manager so it can begin operating.