Thanks so much - I got everything up and running yesterday. I have each of the white COM wires now going into separate C plugs on the left (1-8 zone) side. The Rain sensor wires are plugged into S1 and SC, though I don’t know which wire should go in which plug, so for now I guessed. I turned on the rain sensor in the app and went through the zone setups - all working great. Unfortunately a few of the rotor heads seem broken - i.e. water shooting out of the bottom, but that’s a separate issue that’ll be fixed by a service this weekend.
Does it matter which of the rain sensor wires go in S1 or SC? And sorry I don’t know the make/model. I’ll try to find it when I get home. It never seemed to work on my old system anyways, it would be sprinklers on during rain all the time - so I’m not too worried about it.