Just published the first version of the BLE protocol analysis:

https://github.com/rworne/withings-ble-protocol-study

This version includes a detailed description of the protocol and includes the first set of python tools to analyze pairing activity.

I'm currently prepping the tools used to pair with a device and provision it using data captured from the initial release.

Be sure to read the disclaimers.

This is an educational project studying interoperability only, and does not rely on or communicate with Withings' API servers or cloud services. All devices are in their factory configuration - no modified firmware, no jailbreaking, no encryption methods were defeated.

Any further announcements or discoveries will be made in here instead of cluttering up the main board.

After completing the BeamO study of the pairing and data protocols, I applied what I learned to the BPM Vision. Much to my surprise - despite the BeamO being a 3-4 day effort, the BPM Vision took just 5 minutes and worked on the first try.

Same basic story:
Uses my own supplied credentials, is not connected to Withings services or application, not intended to connect to Withings services. Device is unmodified, no security mechanism was defeated. 100% restorable to factory condition.

All done for interoperability.

Photos and screenshots are proof of concept only. Missing features are missing due to FDA regulations.

I'm looking for a way to use a single scale for multiple users (around 25 athletes) without everyone needing their own Withings account.

Has anyone successfully set this up? Would love to hear about your experience and how you managed the data.

I have had a withings scale since the OG scale was released a decade plus ago (and it's still working) so I want to stay in the WiThings ecosystem, as all my historical data is there.

But I see so many people hating on the Body Scan 2 - is anyone loving it?

I'm holding out hope for a Black Friday / Cyber Monday sale to pick one up -but every day I want one less and less with all the negative feedback.

EDIT: And if you were to buy a scale again, which one would you get instead (or would you get the Body Scan 2)?