Hi @BenAtSense and other interested parties,
I've had a completely reliable Sense connection since mid-Jan, without any dropouts or issues. Then suddenly in the past two days I've had my Sense go offline twice without any brownout or power outage. What happened ??
I'm fortunate to have some monitoring of devices on my intranet and spotted something suspicious. The IP address of my Sense changed twice in the the past two days after being the same for 159 days in a row ! Why ? Because my son was tweaking our home router to enable port forwarding of a couple of games, then for some reason, the router was not able to allocate the same IP address for the Sense when it reset. It looks like the Sense and data servers can't maintain the app session or initiate another app session once the private intranet IP address has changed.
A reboot of the Sense hardware via the circuit breaker eventually fixed things each time and very little data was actually lost. But this is clearly one mode of connection failure.