Originally Posted by
jitteringjr
This confuses me. In order to get power and cadence on either to the 520 you still need a power meter device and you still need a cadence sensor to pair to the 520. The fitness trackers (at least the Fenix and vivoactive) can pair to power and cadence sensors too. So why can't you get this data on the watches? Seems to me the only difference that a 520 or bike unit will give you is information on when you are on an active segment which I can't see with my Vivoactive HR.
Your device's programming has to be written to handle those sensors. They don't put the same software on every different device. There are marketing considerations too. Not all of us want to pay for features we don't use.
But every time I re-read your statement, I'm not sure what you are asking or trying to convey. Are we talking about two specific models or generalities?
I don't think a VivoactiveHR can use power sensors. Or am I wrong about that?