Caching sensor readings

[palaslet]

Would it be possible to implement some sort of sensor reading cache in the wixel part of this system? I know there is a cache in the xDrip App, but it would be really nice to have a cache in the wixel as well. This would (at least for me) improve the reliability of the system, not to be dependent on having two devices attached to my 4 year old at all times.

I know such thing might increase the traffic on BT and thus decreasing battery life, but being a software engineer myself I know there are ways to make such cache pretty efficient.