I have an AT&T router that covers really well the entire house, but the Rachio unit seems to be in a place where the connection is a bit sketchy. So I added a TP range extender dedicated to cover that area. It seems to be very strong and very stable when I connect to it with my iPhone at the same location where the Rachio is. Not sure if it’s 2.4 or 5 Ghz. What is the Rachio using?