ok, good, that is the same one I use. the W-zero is cheap and does the job.
ok, the second file is optional. you can add it when you setup the Rpi or you can do in the "logging" tab of the web server <ip>:1880/ui/ (where<ip> is your local ip address for the tiltpi server)
You can see mine here if you like. Just don't change anything
http://remote.minbarisplace.com:8887/ui
when you get a new tilt, just go to the logging tab and select the new color tilt and you have to setup where that one is going to log to. weather it is to a google sheets page or brewers friend (I log to brew father) each on has to be setup individually, even if they log to the same place.
you logging interval is setup in the logging tab as well. I think the defualt is 15 min.
just let me stress, once you have it setup, you dont have to set it up again. other than if you want to change the name of the beer on the color tilt you are using. when you drop a tilt in the fermentor, it will start broadcasting and the tiltpi server will hear it and it will show up automatically