Issues adding nest protect wired to existing set up

[Guy972]

Hi, I have 3 nest protect g2 battery working well at my house. I added a wired version at small guesthouse located about 10 yards away and through 2 walls (wood). WiFi reception at the guesthouse is good and I can watch 4k streams well there, operate my smart lights etc. 

I cannot complete the last stage of setting up the wired protect where it connects it to an existing unit in my main house (tried 2 different units that are closest). 

any tips?

[Jeff]

Hi everyone,

In an effort to keep content fresh on the forums here and prioritize current issues, I'm going to go ahead and close up this thread. If you have any outstanding issues from this post or any other problems, please feel free to open up a new discussion.

Thanks,
Jeff