Data field for 735xt using bike cadence sensor; SDK doesn't allow it?

Hi,

My 735xt can read and log sensors on my bike for speed and for cadence. 

But...

735xt is on 2.4.0 and the BikeCadenceListener in the SDK is for 3.0.0 onwards...

Is there any way I can build a data field that can access bike cadence and bike speed through these sensors as the normal info.currentCadence remains null when cycling, so clearly _NEEDS_ to have AntPlus.BikeCadenceListener?

Thanks,

G