Hi, unfortunately the Tacx Neo trainer does not support the FTMS bluetooth spec, and it’s like the last one standing that doesn’t do that in 2021, so this functionality is just not there.
But it has what is called FE-C over BLE, you will see it as a service with UUID: ‘6e40fec1-b5a3-f393-e0a9-e50e24dcca9e’. Now this is a bit more complicated because you will have to send an ANT+ formatted message over the BLE service. I can’t remember whether wheel circumference can be send over this but it might be possible. I’ll look in to it later.
If you wanna try yourself you will need 2 things:
- the FE-C over BLE is on github.
- and the ANT+ FE-C spec is kinda closed, you will need to register and become a member at thisisant to see the docs.
And because you asked:
- the opcodes for FTMS bluetooth are in the corresponding spec.
Cheers