Build a local app to monitor system when offline
Build a downloadable local client app so local outback systems can be monitored When the Internet is down or my Internet connection is poor. My off-grid rural system is very vital, and to have to be on the Internet to monitor it is a very weak link. I can monitor the Mate3s, but its Interface is not near as good as the OpticsRE GUI, and when my system is off the Internet, I lose data during that time, which means I cant power down the router at night or when I am not using the Internet to save precious power.

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LbR commented
Connects with my idea for an Integration to Home Assistant:
https://opticsre.uservoice.com/forums/260691-general/suggestions/39048334-integration-for-home-assistant-hass-ioDoes a router really eat that much power? Anyways you could host Home Assistant elsewhere and connect to it when needed.