Is there any way to control raspberry pi 3 gpio when cayenne server is offline?
Currently Cayenne is a cloud-based product so if our servers are offline there isn't anything you can do with Cayenne to interact with your pi's GPIO. I'm sure you could interact with it locally with any number of other software or just python scripts running on the Pi.
that would be a good feature- to, perhaps, stop a pond from filling while losing connection (for whatever reason). Turn off GPIO during comm loss would prevent unintended events. It should be a toggle in the Cayenne GPIO setup.