Unless you have Access and your hub and your modem/router powered from a UPS, I would suggest considering which of your sensors produce data that is most valuable to you, and put those on Access, taking advantage of its backup and restore function. Sensors with less critical data can then be handled by the old hub.
I can answer one for sure. The 5n1 and any other Accurite sensors you have will be seen by both the older SmarHUB and the new Access (hub).
Beyond that, well, I'm not sure but I have some thoughts.
- Any sensor should only 'associated' with one 'hub'. Both can see a sensor but only one should forward the data.
- Move your most 'critical' sensors, the 5n1, etc, to the Access to utilize it's battery backup up features.
- Not sure how WU will handle hours of data from the Access in a few minutes after a blackout but Accurite says they will.