[petard]

How did you figure out the Bluetooth protocol and commands? I have a Cannondale app for my bike, which is reading the Bluetooth wheel sensor to display speed and mileage. I'd like to build my own app for it but clueless on how to figure out the pairing and transmitted data.

[nsteel]

I found these articles helpful/educational:

* https://urish.medium.com/reverse-engineering-a-bluetooth-lig...

* http://travisgoodspeed.blogspot.com/2011/12/introduction-to-...

* https://github.com/dlenski/ttblue/blob/master/tt_bluetooth.m...

[mcky]

The ANT+ protocol is pretty standard in cycling tech, it might be worth seeing if you can reverse engineer anything using that, as it'll likely have more standard data than trying to reverse engineer BLE payloads

[tyingq]

He mentioned Denton Liu in a tweet, who made this: https://github.com/Denton-L/based-connect

[dannyaziz97]

Hopefully this helps? https://medium.com/propeller-health-tech-blog/bluetooth-le-p...

[halfdan]

You might enjoy this guy who figured out the Bluetooth protocol for good under desk bike: https://codaris.github.io/UnderDeskBike/