Dear drewaz and WeatherCat users on the go, . . .
is it possible to have weathercatRCP connect to WeatherCat over cellular if my phone isn't connected to my home wifi?
WeatherCatRCP is an IP-based application. When it connects to your home network, it uses the Apple protocol Bonjour to find your computer and communicate with WeatherCat. Outside of your home network, you need to provide some sort of a known IP address that WeatherCatRCP can use to find your computer. There are instructions on the WeatherCat Wiki on how to make this work. The main page is here:
https://wiki.trixology.com/index.php?title=WeatherCat_ClientsThe key idea using Dny.com is described here:
https://wiki.trixology.com/index.php?title=Server_SetupLet us know if that is sufficient to at least understand the idea and if you proceed if you successfully make WeatherCatRCP work with your home WeatherCat installation.
Edouard
P.S. I just saw that Grand already answered this question, but I'll leave my reply since is provides a few additional details.