ANT Forum

Hello,
I am trying to understand what type of response I need to return from a slave (USB ANT+ receiver) device in order to get a Kinetic Smart Trainer 2.0 (which DOES have ANT+ support) to send power meter data back. I am using some sample ANT+ code with Python and the Python ANT+ module. I can see messages of Page type 6 and 25 coming from the Smart Trainer device, but I'm not seeing any useful performance/power data in those messages (even when the trainer is spinning). I loosened up the rules on the messages I was seeing and started seeing an occassional 3-byte long Page Type 1 calibration request message come in, so I am assuming that I need to calibrate the device by sending back a properly formatted response.

If someone could describe conceptually what types of Ant+ message(s) I would need to return and how I configure the Slave receiver to do that it would be greatly appreciated. Sample Python/Ant+ code that actually shows something like this (i.e. a calibration request/response) would be super apprecaited!!!!

Cheers,
Wookiefurball      

Hi Wookiefurball,

Have you played around with SimulANT+? It'll give you an idea of if your channel parameters are configured incorrectly. Also take a look at the ANT Messages pane - it'll give you an idea of how ANT+ message payload is formatted.

Have you taken a look at the ANT+ Fitness Equipment profile, and the ANT Message Protocol document? The former document describes ANT+ Fitness Equipment payload, and the later describes general ANT packet structure.

You do not need to send any special messages to receive data from an ANT+ FE device. All you need to do is open a channel with the correct channel parameters (documented in the profile) configured.

Best,
BK      

Thanks for the response, BK. I have lookeda thte ANT message protocol and ANT FE(-C) documents. Appreciate the sanity check with the ANT+ FE device calibration question. I also have a Stages Gen 2 power meter I am testing with - I can see other pages worth of information around product version, battery power, etc. coming through SimulANT+ when setup as a power meter display. However, I am not seeing any real "power" data like RPM or watts. I think that's why I was confused about the calibration aspect. Seems silly, but I can get other ANT+ device types like speed and cadence sensors to give back some kind of meaningful data to test with just by rotating them or even just shaking them - do you think I really need to hook up the power meter to a bike at this point?