🔒 Reading data from Bluetooth smart watch

[idle gulch]

Would it be possible to read the data of my bluetooth smart watch with python? It has a heartbeat monitor and i want to collect data while sleeping 😉 Is that possible?

[normal parrot]

@idle gulch

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[silk swallow]

I think you'll need to look into the device manufacturer documentation. If they offer any API

this will be very device specific

[restive quarry]

@idle gulch look above 👆
it very much depends on which smart watch you have

[idle gulch]

They dont offer any documentation or api. Sooo reverse engineering is my only possibility

Or making my own heartbeat monitor

[restive quarry]

can you share which make and model it is?
because if you have the possibility to writing applications (might require another language then python) that run on the watch that can access the heartbeat monitor that could be an alternative solution

[idle gulch]

I tried to look into that but its pretty closed source. Its a Goji Watch

[restive quarry]

or use another product with a heartbeat monitor that do have some kind of api to use

[idle gulch]

Yeah i could do that. This is the watch https://www.elgiganten.dk/product/mobil-tablet-smartwatch/smartwatch/goji-smart-smartwatch-sort/47730

[crimson salmon]

this very interesting topic that i am very intereted in

[restive quarry]

yeah, seems to be hard finding technical documentation for it, they do have an APK for Android based phones that might be possible to reverse engineer, but that takes a particular set of skills and tools, and not the type of particular set of skills that Liam Nelson's character Bryan Mills are talking about having in the Taken series of movies 😁

so it will probably not be an easy route to go down, unless you already know how to do reverse engineering of android apps

or you might attempt to reverse engineer the BLE traffic itself, which probably isn't easy either

[cloud rose]

you may have some luck running the application within an android vm on your pc and capturing packets using wireshark, and figuring out what packets contain what data, I'm not sure if it'll work, just throwing it out there

[restive quarry]

yeah, or more specifically a android phone emulator in a developer environment such as for example Android Studio to do the above instead of just any android vm

[candid raptor]

idk how to do the mitm attack part and it's best to see the requests and the code too but i know a tool that can open apks into java

https://github.com/skylot/jadx not too bad

does it have any way to check through a site?
i'd say web scarping is generally easier

easiest way to get the apk is to hold down on phone
click share
and send the apk to yourself

than open with 7z and you see all the classes.dex files
you can read he dexes with the tool i sent

[candid raptor]

if you send me a link to the application ill may take a look at it

not like i know much but it's the second thing i see the decompiled code of (better than the first ig)

[restive quarry]

i'm guessing it's the Goji Active android app , if that one is applicable to OPs particular smartwatch

[normal parrot]

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