Solved! Nest Protect due to error P009 (0.80). Requires port 11095.

[Peterdeg]

This one was driving me insane.

I'd tried all the suggestions of creating a new home, using 2.4Ghz, making sure no other Nest products etc. etc.

Finally, I started monitoring my firewall and saw connection attempts on port 11095 from the Protect being blocked.

Added a rule to allow it and bingo! Added to the Nest app and got the verbal "Connected" message.

[EmersonB]

Hello Peterdeg,

Thanks for getting back to us and we're glad that it's resolved now. We appreciate you sharing here what you've done to resolve the issue. We’ll consider this one complete so let us know if you have other questions or concerns as I will be locking this after 24 hours. Feel free to start a new thread and we'll be happy to help.

Regards, 

Emerson