I have an idea for an app, do these APIs exist?

So one thing I really want to be able to do is sync my digital scale with Garmin Connect. It's an off-brand white labeled Chinese scale with a generic white-labeled phone app call VSyncFit. In order to get my weight into Garmin Connect, VSyncFit syncs to a Fitbit account (even though I don't own a Fitbit), which syncs to MyFitnessPal, which syncs to Garmin Connect, which is hilarious that that actually works.

The nice thing is, people have already decided the magic numbers used in the BLE communication between the white labeled VsyncFit app and the scale, and it's ASL Licensed.

Given my Garmin Venu has host BLE capabilities (AFAIK), I was thinking, how about an app for my watch that I flick on, then jump the scale, then have the scale talk straight to my watch. Examining the API, it does _not_ look like one can create arbitrary sensor types, so it'd have to be a watch app of some sort.

* So a couple of things, does the Venu have the capability to connect to arbitrary BLE devices like my scale?

* Assuming I have that working, does an SDK Exist where I can enter a weight value into Garmin Connect directly?

If you could point me to the documentation on the second, that's where I'm really struggling.

cheers,

-Jonathan

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0 jim_m_58 over 4 years ago

Starting with CIQ 3.1, some devices with CIQ 3.1 can have apps that talk BLE directltly to sensors, I do that with a few, and even a raspberry pi.

So, there's definitely a chance your watch can talk to your scale over BLE.

But then the question is, what do you do with it. With CIQ, you can't change the weight setting on either the watch or in Garmin Connect.

There's the Garmin Health API, but I've never looked at it. It might be able to update GC, which then updates the watch,

https://developer.garmin.com/health-api/overview/

0 9256409 over 4 years ago in reply to jim_m_58

An individual can't subscribe to the health API so that's a non starter I think. I have a withings scale and use a python script that someone wrote to read the data from the withings API and send to garmin connect by turning the weight, body fat, etc. measurements into a fit file format and uploading that. The repo is here: https://github.com/jaroslawhartman/withings-garmin-v2

I think it would be possible to reimplement that as a CIQ program to upload it after you've read the data over BLE.

0 jim_m_58 over 4 years ago in reply to 9256409

See this app. Looks like it creates a fit file.

https://apps.garmin.com/en-US/apps/b664a863-4bbc-4ae8-b068-56aa96014edc

0 9256409 over 4 years ago in reply to jim_m_58

it appears to create a csv file which you then have to convert to a fit file using the sdk. At least that's my impression reading through the forum link for the app

0 jim_m_58 over 4 years ago in reply to 9256409

Not sure, as in the change log I see a reference to fitcontrib.

0 Exabrial over 4 years ago in reply to jim_m_58

Is any of your raspberry pi stuff open source by chance? I think I have a handle on the Monkey-C language, but the framework itself is kinda quirky. Thanks!

0 Exabrial over 4 years ago

Thanks everyone for the replies. It looks like the way to go would be to try and create a FIT file then somehow sync that to your profile. I don't want to modify the User Profile directly, but add a measurement point. Somehow MFP manages to do this. I may play around with REST apis and see if I can get that working at the command line first to prove out that part of the concept.

If there are any open source MonkeyC BLE apps, please send them my way!

0 jim_m_58 over 4 years ago in reply to Exabrial

See https://forums.garmin.com/developer/connect-iq/b/news-announcements/posts/would-you-like-some-raspberry-pi-with-your-connect-iq

The code is there as well as a pdf of how things work, I use node.js on the pi.